Graylog Search Regular Expression

RegE xr Created by gskinner, this is one of the best online regular expression tool we’ve seen so far. These are encoded in the pattern by the use of special characters, which do not stand for themselves but instead are interpreted in some special way. If you can express your statements in order, then the work has already been done for you. The updated CSS menu will look similar to the below example image and text outputs. Snippet Name: Regular Expressions - REGEXP_LIKE. A query string such as the following would force Elasticsearch to visit every term in the index:. Regular expressions are a concise and flexible tool for describing patterns in strings. Comparison Operators. Graylog2 Optimization for High-Log Environments based on the matching or not matching of a regular expression. Regular expressions don't have to include regex metacharacters. We introduce a method and a tool called Rex, for symbolically expressing and analyzing regular expression constraints. Just tick the "use Regular expressions" checkbox and we're off to the races. Graylog configuration. Regular expressions (abbreviated as regex or regexp, with plural forms regexes, regexps, or regexen) are written in a formal language that can be interpreted by a regular expression processor, a program that either serves as a parser generator or examines text and identifies parts that match the provided specification. A regular expression is specified using two types of characters: Metacharacters--operators that specify algorithms for performing the search. Start a Syslog UDP input and remember the port you let it listen on. When you search for data in a text, you can use this search pattern to describe what you are searching for. Net developers avoid to learn regular expressions as long as possible, while using only classic string manipulation when work with textual data. Ask Question Asked 4 years, 1 month ago. zil files, allowing for easy importing into Excel. You can also insert sequential numbers to text strings where no numbers exist originally. This regular expression matches both 'abd' and 'acd'. These technique have a range of applications and R's base installation has powerful regex tools (not to mention add-on packages for string manipulation such as stringr). Regex split with multiple lines. For a list of operators supported by the regexp query, see Regular expression syntax. You normally use a regular expression to search text for a group of words that matches the pattern, for example, while parsing program input or while processing a block of text. If you aren't familiar with regular expressions, the short Regex course on Cybrary is a demo heavy introduction (lots of examples, not a lot of lecture - I got a lot out of it) and regexr is a fantastic sandbox to practice in. Description Just a simple US State regex. POSIX Regex Functions. As previously mentioned, several characters have a particular meaning inside regular expressions. Regular expression is used to : (1) test a string whether it matches a pattern, such as a email address. You can think of regexps as a specialized pattern language. This section discusses the operators available for regular expression matching and illustrates, with examples, some of the special characters and constructs that can be used for regular expression operations. It's a handy way to test regular expressions as you write them. ) As with most things, the 80/20 rule applies. The Search and Replace Regular Expression Wizard is an application we made to help you create, understand, and debug Regular Expressions used by our Search and Replace, Replace Studio Pro, and Replace Studio Business Edition windows grep utilities. A performant way to work with them is through the use of Regular expressions, also known as Regex. You can use regular expressions with the rex and regex commands. For example, if you want to search any two-word variation of "search TERM", you can use the wildcard operator. Graylog provides a saved search functionality to accomplish exactly that. Search Mode Modifiers. Due to Scintilla's limitations, I'd do this in two steps. We're the creators of the Elastic (ELK) Stack -- Elasticsearch, Kibana, Beats, and Logstash. A regular expression is not language specific but they differ slightly for each language. " Now they have two problems. Easily Use Regular Expressions in Your Perl Scripts. Following all are examples of pattern: ^w1 w1|w2 [^ ] grep Regular Expressions Examples Search for 'vivek' in /etc/passswd grep vivek /etc/passwd Sample outputs:. By mkyong | July 23, A simple Java example to validate a domain name with above regular expressions pattern. To take full advantage of the search and replace facilities in Sublime Text, you should at least learn the basics of regular expressions. Describes the theory behind regular expressions (RE) as well as the practical usage. when we wanted to search for "violence" and "violent" above, we used one regular expression "violen. Sometimes when retrieving documents in a collection, you may not know exactly what the exact Field value to search for. Use it to make a field match a internet address such as 192. Unleashing the Full Power of Regular Expressions in Microsoft Office Documents we can perform a Regular Expression search on the text and see if there are any. {x,y} Matches x to y number of occurrences of a regular expression. When I set the condition to match the exact value of the field - alert is triggered. Description. Graylog Extractors can extract data using regular expressions, Grok patterns, substrings, or even by splitting the message into tokens by separator characters. grepl returns TRUE if a string contains the pattern, otherwise FALSE; if the parameter is a string vector, returns a logical vector (match or not for each element of the vector). yum search already does a fuzzy search, so using wildcards is pretty useless. Most DOIs found in the wild are presented within some visual design program. We will show some examples of how to use regular expression to extract and/or replace a portion of a string variable using these three functions. If change the rule processing form 'both' to 'either', I see all bro_dns messages arrive in the stream. A typical use for regular expressions is in finding text in a Writer document; for instance to locate all occurrences of man or woman in your document, you could search using a regular expression which would find both words. A quick reference guide for regular expressions (regex), including symbols, ranges, grouping, assertions and some sample patterns to get you started. A regular expression (abbreviated regexp or regex) is a way to describe sets of characters using syntactic rules. introduction to the basics of programming regular expressions as well as provide an introduction to how. regex_match(target_string, regex_obj) The regex_search function returns true if the target string contains any substring that matches the pattern stored in regex_obj. A good example of this is the search function in text editors. RegEx) appear almost as a separate language inside. " Now they have two problems. Parts of regular expressions that are not supported by Microsoft Word wildcards are: Nested tagged expressions. Regular expression operations look sequentially for matches between the characters of the pattern and the characters in the target sequence: In principle, each character in the pattern is matched against the corresponding character in the target sequence, one by one. In JavaScript, regular expressions are also objects. This tutorial will give an insight to regular expressions without going into particularities of any language. A ‘regular expression’ is a pattern that describes a set of strings. Rex is implemented using the SMT solver Z3, and we provide experimental evaluation of Rex. It defines regex as “a pattern describing a certain amount of text,” and goes into the basics at a nice high level. Regular expressions are very common in some areas of computing, and are often known as regex or regexp. The sticky property reflects whether or not the search is sticky (searches in strings only from the index indicated by the lastIndex property of this regular expression). Regular Expression in Java is most similar to Perl. Regular expressions are a way to search for substrings ("matches") in strings. This thread collects some useful regular expressions. REMARK : Due to the structure of regular expressions, the different matches, of your regex, may be quite weird, while searching in an upwards direction ! Just consider, below :. This regular expression is a solution to our problem, but it does not answer every instance of the problem of adding commas to numbers. The supported regular expression syntax is explained in Regular expression syntax. Thanks to them, you can utilize the power of regular expressions. Creating extractors is possible via either Graylog REST API calls or from the web interface using a wizard. lb_recognition_period_seconds = 3 # Every message is matched against the configured streams and it can happen that a stream contains rules which # take an unusual amount of time to run, for example if its using regular expressions that perform excessive backtracking. Regular expressions are pattern matching utilities found in most of the programming languages. We highly recommend that you learn and use this type of regular expression syntax, as it is far more powerful (and in some cases even simpler) than the regular expression types covered in this power tip. To the delight of most Graylog users, geolocation is automatically built into the platform via the "GeoIP Resolver" plugin. com site towards bottom right has QUICK REFERENCE with common regex expressions and their meaning. We deliver a better user experience by making analysis ridiculously fast, efficient, cost-effective, and flexible. The abbreviation for regular expression is regex. Regular expressions allow us to not just match text but also to extract information for further processing. The regex ([\w-]+$) works when i test in online regexr. 2017/02/08 [graylog2] Graylog 2. Of course, the search target for this topic search engine is reduced to source code only. Multiple regular expressions can be added to a Content Examination definition, used to search for matching text within scanned mail. The search pattern is described in terms of regular expressions. With RegEx you can use pattern matching to search for particular strings of characters rather than constructing multiple, literal search queries. Redirect Regular Expressions A regular expression (or regex) is a group of characters used to find a pattern within a piece of text. Regexps are quite useful and can greatly reduce time it takes to do some tedious text editing. In this article I want to show two examples on how regular expressions can be used for transforming SQL queries in SSMS. How to use regular expressions Problem: How to use regular expressions. no graphics or fancy formating). We're the creators of the Elastic (ELK) Stack -- Elasticsearch, Kibana, Beats, and Logstash. Regular Expression Searching For more information contact: [email protected] Today we would like to introduce you to the new MongoDB Full Text Search and compare its capabilities and performance with simple regular expressions, which are currently state of the art for. Google Code Search supports regular expressions. In this tutorial, we will practice using these expressions (referred to as regular expressions in the context only of T-SQL) for filtering price phrases involving alphabetic, numeric, and special characters. Regular expressions can do a lot of stuff. In memoQ, this “something useful” may mean segmentation, “auto-translation”, conversion to a tag, or including/excluding text from translation. Regexes are regular expressions, a set of characters, metacharacters, and operators that define a string or group of strings in a search pattern. grepl returns TRUE if a string contains the pattern, otherwise FALSE; if the parameter is a string vector, returns a logical vector (match or not for each element of the vector). lb_recognition_period_seconds = 3 # Every message is matched against the configured streams and it can happen that a stream contains rules which # take an unusual amount of time to run, for example if its using regular expressions that perform excessive backtracking. " (be dated) pasar de moda loc verb locución verbal: Unidad léxica estable formada de dos o más palabras que funciona como verbo ("sacar fuerzas de flaqueza", "acusar recibo"). The PowerShell script (Search-TextLog. The search( ) or match ( ) function of regular expression object which produced the MatchObject instance. The regular expression parser in the editor seems to be only a subset of regular expressions. Problem description. Regular expressions have their own syntax and often you’ll need to consult a regular expression reference if you’re doing something complex. Regex aren’t unique to Python — it began in 1956, when Stephen Cole Kleene created regex as a notation to describe the McCulloch and Pitts model of the human nervous system. Using regular expressions for search-and-replace operations is simple. For example, you can create a segment for all data from India with the following filter definition: Country matches regex India Regular expressions are greedy by nature: if you don't tell them not to, they match what you specify plus any adjacent characters. It's a handy way to test regular expressions as you write them. I want to filter messages with Event ID's in Windows and I have created a rule as given below. 6p1 [graylog2] FeedBacks from users. Searches for a regular expression pattern and replaces it with a replacement string. Click the button, and your search criteria will be interpreted as a regular expression. I'd first replace the text with special text that isn't found elsewhere in the document. REGULAR SEASON. Example: "^$" matches the empty string. To change the settings used by the action: On the action’s title click the down arrow to activate a drop-down. The output must match this regular expression for the test to pass. Use parantheses to group the boolean expressions to create complex match expressions. edu Sridhar Rajagopalan IBM Almaden Research [email protected] CREATE ASSEMBLY script which I’ve included. Practicing Regular Expressions with Search and Replace If you’re just starting out with regular expressions (regex), the syntax can seem a bit puzzling at first (I would recommend Jason. A regular expression in a FIND, CHANGE, or EXCLUDE command allows you to search for a string matching a regular expression. Use parantheses to group the boolean expressions to create complex match expressions. And you can even do it with Regular Expressions in T-SQL. subname) with the regular expression:. An RDAP service implementation will receive regular expressions search patterns that are base64url encoded. Regular expressions (Regex) are specially encoded text strings, which are used as patterns for matching sets of strings. The collector can read local log files and also Windows Events natively, it then can forward the log messages over the network using the GELF format. We introduce a method and a tool called Rex, for symbolically expressing and analyzing regular expression constraints. That only affects searches and not the stream rules engine. It indicates, "Click to perform a search". Online regular expression tester (regex calculator) allows to perform various regular expression actions on the given text: Highlight regexp - highlights parts of the text that matches the regular expression. This searches for matches of a regular expression to a nucleic acid sequence. One way that a phone number can come is, 516-111-1111 Another way that a phone number can come is, (516)111-111 These are standard ways to represent phone numbers in the United States and probably elsewhere as well. It indicates, "Click to perform a search". If at the beginning of a regular expression, it specifies the multiline mode for the special characters ^ and $. In short form Regular Expression is known as RegEx. The first approach may seem obvious, but if you think about it regular expressions are logical "and" by default. gov; this expression will return all of the senatorial email addresses found in this page. The enhanced regex engine includes an additional flag to allow Java syntax to be used in JavaScript regular expressions. You can use regular expressions with the rex and regex commands. when we wanted to search for "violence" and "violent" above, we used one regular expression "violen. Patent Application, filed 10/28/2016. You can use both Dissect and Grok for a hybrid use case when a section of the line is reliably repeated, but the entire line is not. , and then use replace with regex extractor or match with the regex I gave earlier in a pipeline. A Simple Regular Expression We already said in the previous section that we can see the variable "sub" as a very simple regular expression. "find and replace"-like operations. When creating constants with regular expressions you can use the MustCompile variation of Compile. Left-clicking the pearl, mouse-over Insert Action and then the Categories to reveal the actions, click the required action from the list. Look out for the wildcard, which is a dot - if you wanted to match a dot (for example in a domain name), you will need to escape it with the backslash. Use the compile method when you know the regular expression will remain constant (after getting its pattern) and will be used. When you want to search and replace specific patterns of text, use regular expressions. Trying regex pattern on greylog search. Their syntax looks cryptic for beginners thus many ASP. unfortunately this doesn't work either. Graylog is a leading centralized log management solution built to open standards for capturing, storing, and enabling real-time analysis of terabytes of machine data. graylog-generic-syslog. Writing Grok is as easy as writing down your text in plain text and replacing desired selection with a variable, see below example:. When something unusual is suspected, send a message to the related person via Slack. You can also apply a multiline filter first. Step 1: After downloading Regular Expressions. Regular expressions have three optional flags that allow for global and case insensitive searching. local , as a simple test When I run a search using this I see the expected results, but no messages arrive in the stream using exactly the same conditions. See link to the lower left. com Abstract In this paper, we describe the design, architecture, and the lessons learned from the implementation of a fast reg-ular expression indexing engine FREE. Pulling back on free expression wasn’t the answer and, in fact. Welcome to the Graylog documentation¶. For the individual elements of regular expression syntax, please refer to Oracle's documentation, however the syntax largely follows the familiar regular expression languages in widespread use today and will be familiar to most. @andrewdore, do read @jeffland's comment as well. Flags for Search and Replace; Pattern atom; Pattern Qualifiers; Character Classes; Multiple and Saving Patterns; Word Boundary; Search Pattern modifiers; Changing Case using Search and Replace; Delimiters in Search and Replace; Further Reading; Flags for Search and Replace. Welcome to the Graylog documentation¶. 0/Graylog 1. Pulling back on free expression wasn’t the answer and, in fact. When we are validating email addresses, IP-Addresses and any other special string, we should use a regular expression for perfect pattern matching. Introduction to String Matching and Modification in R Using Regular Expressions Svetlana Eden March 6, 2007 1 Do We Really Need Them ? Working with statistical data in R involves a great deal of text data or character strings processing, including adjusting exported variable names to the R variable name format,. This is only a very basic example,. )+local Which should match all queries for something. Similar to the LIKE operator, but performs regular expression matching instead of simple pattern matching. Example: If ^(h*o^) ^(f*s^) matches "hello folks", ^2 ^1 would replace it with "folks hello". Regular expression is a vast topic. when we wanted to search for "violence" and "violent" above, we used one regular expression "violen. The thing is, in the Pipeline rule, I use the set_field() function to assign the value of the matching group from the regex. As the code in Listing 1 shows, you first create an instance of the RegExp object. NET regular expressions to find and replace text. Regular Expressions in SciTE Purpose. Variations If you want to search for email addresses in larger bodies of text instead of checking whether the input as a whole is an email address, you cannot use. With PowerGREP, you can search through files and folders on your computer or network, edit and redact files with search and replace operations, and collect information from files, all using regular expressions. The User Interface. 5 Regular Expression Search. Non-capture groups. The similarity metrics allow developers to find regular expressions that are similar to a buggy regular expression, as well as explain how the behavior differs among them. Regular expressions are patterns used to match character combinations in strings. Regular Expression Syntax Reference. Domain name regular expression example. Some characters have special meanings in regular expressions. “find and replace”-like operations. Regular expressions are used when you want to search for specify lines of text containing a particular pattern. The postal code can be represented in regular expressions format as [0-9]{5}. The mongo DB non-relational database works in conjugation with the web interface to store the user data and data of the streams and information about the regex and regular expressions applied for creating the streams. The basic idea of regular expressions is we define a pattern (the “regular expression” or “regex”) that we want to match in a text string and then search in the string to return matches. "\d{2,3}" matches at least 2 but no more than 3 digits. "\s{2,}" matches at least 2 space characters. Some characters have special meanings in regular expressions. Regex search in fields do not. One way that a phone number can come is, 516-111-1111 Another way that a phone number can come is, (516)111-111 These are standard ways to represent phone numbers in the United States and probably elsewhere as well. Examples of regular expression syntax are given later in this chapter. For details about specifying a phone number normalization rule, how to use. Background: Recently a customer was dealing with a virus/spam issue that was interesting. Graylog Extractors can extract data using regular expressions, Grok patterns, substrings, or even by splitting the message into tokens by separator characters. Two types of regular expressions are used in R, extended regular expressions (the default) and Perl-like regular expressions used by perl = TRUE. Unleashing the Full Power of Regular Expressions in Microsoft Office Documents we can perform a Regular Expression search on the text and see if there are any. The abbreviation for regular expression is regex. ? Match zero or one occurrences. A regular expression—or “regexp”—is a text string of special characters that specifies a set of patterns to match. Some people, when confronted with a problem, think "I know, I'll use regular expressions. For example, the pattern "im) abc" would search for abc with the case-insensitive and multiline options (the parenthesis may be omitted when there are no options). Typically, you will download web-pages written in HTML that were designed for a web-browser to render (draw on-screen) for a human to read. So, i just wanna add the regular expression to my search so that READ and WRITE values of a particular field of a user will be popping up. RegE xr Created by gskinner, this is one of the best online regular expression tool we’ve seen so far. After that you choose the elements you want to match by just clicking on them; this action generates a regular expression together with the associated code around it. + Match 1 or more chars. A Comprehensive Introduction to Command Line for R Users Getting Started with the Command Line. [graylog2] Re: quickfilter and streams search for field not containing something [graylog2] QuickFilter Case Sensitive? [graylog2] Seeing logged in users [graylog2] Kibana and graylog, duplicated efforts? [graylog2] Date search in quickfilter with expression does not work [graylog2] fulltextsearch in graylog2 0. Related course: Complete Python Programming Course. They allow you to search for patterns in a string—either simple or complex—in such a way that you can find variations of. Redirect Regular Expressions A regular expression (or regex) is a group of characters used to find a pattern within a piece of text. Create Squid Logs Extractors on Graylog Server. Since SAS already has such a powerful set of string functions, you may wonder why you need regular expressions. I prefer to call it "counting" though. A regular expression is a special text or string which is describing a different search pattern. if I go to ES directly and search with regexp I'm getting nice results. In the example above, a date field is validated using Regular Expressions. Have a look at Regular Expressions In Various Tools for examples of regular expression usage. ~ matches a regular expression that is case sensitive. Long regular expressions with lots of groups and backreferences may be hard to read. To match a string exactly six digits long, you'll have to specify the start(^) and end($) indicators on the expression: [code]/^[0-9]{6}$/[/code] However, {N} is possible only with extended regular expressions. Configuring Graylog. Most DOIs found in the wild are presented within some visual design program. (computing theory) A concise description of a regular formal language with notations for concatenation, alternation, and iteration of subexpressions. Message regex: A regular expression to extract a portion of the message. We're the creators of the Elastic (ELK) Stack -- Elasticsearch, Kibana, Beats, and Logstash. Regular expressions use a language of their own, specifically designed for string processing, with some of the most popular listed below:. But normal regex seems not to be working for graylog. Regex Scraper Chrome Extension Regex Scraper, will scrape the page and compile results for copy and pas. Example: "[^0-9]" matches any non digit. Net Community by providing forums (question-answer) site where people can help each other. )+local Which should match all queries for something. txt to find all text files in a file manager. The power of regular expressions comes from the ability to include alternatives and repetitions in the pattern. For a list of operators supported by the regexp query, see Regular expression syntax. It also includes using regular expression tools to perform searches through a filesystem or file content. The syntax of regular expressions is explained in the next section. A regular expression can be a single character, or a more complicated pattern. Regular Expression can be used to search, edit or manipulate text. All finds are saved so you can review them and undo individually. Epsilon searches the buffer for an occurrence of one of the strings contained in the set. NOTE: There are multiple options for reading this documentation. yum search already does a fuzzy search, so using wildcards is pretty useless. It can be helpful for using the result of a function like select_jsonpath or regex in the currently processed message especially when the key names are the result of a regular expression. Graylog regex search with numbers in text. SSH_login_username (Regular expression) SSH_login_username_publickey (Regular expression). You basically have to "count" quotes to determine whether a space is within quotes or not. Regular Expressions Tutorial Learn How to Use and Get The Most out of Regular Expressions. Searches would be more powerful if we could also do regexp. Click to expand or collapse. You also use regular expressions when you define custom field extractions, filter events, route data, and correlate searches. For a tutorial about Regular Expressions, read our JavaScript RegExp Tutorial. The Search and Replace Regular Expression Wizard is an application we made to help you create, understand, and debug Regular Expressions used by our Search and Replace, Replace Studio Pro, and Replace Studio Business Edition windows grep utilities. Splunk regular expressions are PCRE (Perl Compatible Regular Expressions). Click on the Replace All button. Regular expressions are used for pattern matching, which is basically for findings strings within documents. Many Unix utilities operate on plain text files line by line, such as grep, sed, and awk. A regular expression is a way to match patterns in data using placeholder characters, called operators. I will call the two Types of regular expressions Posix and Perl. We will show some examples of how to use regular expression to extract and/or replace a portion of a string variable using these three functions. The problem is that, in order to maintain the structure of the output list,. Character Classes. Simple word matching. You can match “Post Code” and “PostCode” in one regular expression search. GExperts implements a subset of the Perl regular expression syntax, as described below. $0$ will extract the entire expression. : Copy input, Grok pattern, Json, Regular expression, repleace with regular expression, Split & Index, Substring, Lookup Table …what is the most suitable method with graylog to normalize the logs ddbnl over 1 year ago. For instance, if you search for the regular expression "foo" in the string "John plays football," you get a match because "foo" occurs in that string. Monitor Squid Access Logs with Graylog Server. Regular Expressions, introduced in c++11, may optionally support a return array of matched strings or another textual syntax defining how to replace matched patterns in strings operated upon. Problem description Whe you want to match the beginning of a syslog message that starts with a blank space against a "match regular expression" stream rule, you must not include the leading blank space in your regular expression if you w. 6p1 [graylog2] FeedBacks from users. Regular expression to search for Gadaffi. Fill out the Registration Form to receive a free registration code, which is necessary after a 60 day trial. These are encoded in the pattern by the use of special characters, which do not stand for themselves but instead are interpreted in some special way. " to find both. In the string: This is a string to search for a regular expression like regular expression or regular-expression or regular:expression or regular&expression. A Regular Expression is basically a special text string for describing the search pattern. Tailored hand crafted suits, sport coats, blazers, trousers and overcoats created in our family-owned Brooklyn factory using the same high quality techniques for over 100 years. Sometimes this isn't desirable, imagine for example we wanted to match the word "success" in a log file. Well, from reading on the intented use case for yum search, combining it with regular expressions/wildcards is double-redundant. I'm using Graylog's sidecar functionality with Filebeat to pickup a number of different log files off my server, including Syslog, Nginx and Java App. com However, when i used in graylog search it failed. When matching against text, the regexp returns a match that begins as early as possible in the input (leftmost), and among those it chooses the one that a backtracking search would have found first. search: String or regular expression (use the latter, set /g!) replacement : String (with $1 , etc. First, the library is solid and useful. NET regular expressions was slow and covered with ads, I decided to write a simple AJAX regular expression tester. I would like to know the exact format for creating the rules for Streams and Blacklist. I will list out some scenarios to help you understand. How do I use the grep command with regular expressions on a Linux and Unix-like operating systems? How do I use grep and regular expressions to search for text/ words in Linux? Linux comes with GNU grep, which supports extended regular expressions. This article is part of a series of articles on Python Regular Expressions. This tutorial teaches you all you need to know to be able to craft powerful time-saving regular expressions. " (be dated) pasar de moda loc verb locución verbal: Unidad léxica estable formada de dos o más palabras que funciona como verbo ("sacar fuerzas de flaqueza", "acusar recibo"). Regular expressions are used when you want to search for specify lines of text containing a particular pattern. Examine what you are composing in the Preview pane and if it doesn't match what you intend, keep revising until it does before pressing Submit. If you aren’t familiar with regular expressions, the short Regex course on Cybrary is a demo heavy introduction (lots of examples, not a lot of lecture – I got a lot out of it) and regexr is a fantastic sandbox to practice in. (3 replies) Hi All, My query might be very basic to everyone. One comment about 5. The regex ([\w-]+$) works when i test in online regexr. Regular expression replace in Visual Studio 2010 September 5, 2012 February 8, 2016 mattfrear Code visual studio 2010 I can never remember how to do replaces in Visual Studio using regular expressions, so here’s a quick example. The pattern defined by the regex may. - Possibility of visual debugging of regular expressions while working them out. Regular expressions are patterns used to match character combinations in strings. The greedy property of regular expressions is used to ensure the longest match. A regular expression defines a search pattern for strings. Two regular expressions can be alternated or concatenated to form a new regular expression: if e 1 matches s and e 2 matches t, then e 1 |e 2 matches s or t, and e 1 e 2 matches st. Welcome to Python Regular Expressions Course! In just a couple of hours, you will master regular expression language and learn internals of the regular expression engine. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: