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• Determining whether values can potentially match a regular expression, given more input

  - by Andreas Grech

  I am currently writing an application in JavaScript where I'm matching input to regular expressions, but I also need to find a way how to match strings to parts of the regular expressions. For example: var invalid = "x", potentially = "g", valid = "ggg", gReg = /^ggg$/; gReg.test(invalid); //returns false (correct) gReg.test(valid);…

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• What is the regular expression for valdating a 'price' in a jtextfield

  - by wniroshan

  I want to validate a jtextfield as user inputs a price of some item. I have a perfectly working code which beeps and discard if user inputs some character that doesnt match the regular expression.(for regular expression "[0-9]+" it accepts any number of digits and beeps if a letter is given as input) But the problem is I want to validate an input…

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• ASP.NET, JQuery - Sharing regular expressions

  - by Steve

  If you have a fair number of regular expressions used by both client (javascript) and server side code (C#, vb.net) and want to store them in one place to avoid duplication, where do you store them? I could use registerscript and write out the regex as strings, but just wondering if there is something more elegant.

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• Convert regular expression to CFG

  - by user242581

  How can I convert some regular language to its equivalent Context Free Grammar(CFG)? Whether the DFA corresponding to that regular expression is required to be constructed or is there some rule for the above conversion? For example, considering the following regular expression 01+10(11)* How can I describe the grammar corresponding to the above…

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• Concat E4X expressions in ActionScript 3

  - by loto

  Is there any way to concatenate E4X expressions? If I store "half" a path in a variable, can I concatenate the way I do with Strings?

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• Using Regular Expressions for Verilog Port Mapping

  - by Adam

  So I have a really long port map where I want to replace a bunch of SignalName[i], with .SignalName(SignalName[i]), I think I can do this easily with regular expressions but I can't for the life of me figure out how. Any ideas?

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• Can I use relative XPath expressions in libxml2?

  - by brbr

  I am wondering whether it is possible to use relative XPath expressions in libxml2. This is from the javax.xml.xpath API and I would like to do the similar thing using libxml2: Node widgetNode = (Node) xpath.evaluate(expression, document, XPathConstants.NODE); With a reference to the element, a relative XPath expression can now written…

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• Regular expression to validate name in .NET multilingual web application

  - by BT

  Hi, how can i write a regular expression to validate name field in a multilingual web application, i want to validate the name field for non-English languages e.g. Spanish or German, and we need to make sure that no one enter digits or special characters. I'm using .NET. I believe we can't use expression as below for non-English language. …

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• string directly before with regular expressions?

  - by acidzombie24

  I have been given a file that has its string like this blah blah DUMMY blah blah DUMMY blah blah VALUE blahX blahY KEY Some values/keys are optional, i cannot depend on order. With regular expressions using C# how do i write an regex that takes the value directly behind the key? I know i could write it in such a way it will match the…

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• problem in defining regular expression.

  - by Akhilesh thakur

  How to define regular expression of mathematical expression.please define a common regular expression for 5+4 5-3 5*6 6/2

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• Using GWT to output XML, JSON and regular HTML

  - by Artem

  Sorry, this is a very basic question, as we are just getting started with exploring GWT. We would like to know if it's easy and possible to get GWT to "output" XML, JSON and regular HTML. I would like to know this because ideally we would port parts of our backends over slowly, and it would be nice to drop in GWT in place of AJAX…

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• Linq Queries converting to lambda expressions ?

  - by Freshblood

  Hello from item in range where item % 2 ==0 select i ; is converting to lamda expressions as below range.where(item % 2 ==0).select(x=>x). I feel that first way of linq is translating next one and if it is ,so is there any optimization like this range.where(item & 2 == 0) instead of other one ?

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• Reverse regular expressions to generate data

  - by Anton Gogolev

  In one of the StackOverflow Podcasts (the one where guys were discussing data generation for testing DBs -- either #11 or #12), Jeff mentioned something like "reverse regular expressions", which are used exactly for that purpose: given a regex, produce a string which will eventually match said regex. What is the correct term for…

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• Question regarding php Regular expression filenames

  - by jason

  I am very bad at regular expressions, but I have a regular expression that is working okay, except for one issue: /\/(.*?).php/ I only need this regular expression to find things like: /this-a-valid-page.php {some words here} /anotherpage.php { some words here} http://www.google.com but do not find URLs the problem i am…

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• Alter Regular Expression to Return 2 Values Instead of 3 from userAgent String

  - by Jay

  I've taken a regular expression from jQuery to detect if a browser's engine is WebKit and gets it's version number, it returns 3 values extracted from the userAgent string: webkit/….…, webkit and ….… [“….…” being the version number]. I would like the regular expression to return just 2 values: webkit and ….…. I'm rubbish at…

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• Learning Regular Expressions

  - by Teifion

  I already know the basics of RegEx but I'm not sure where to go from here, I'm looking for both a good and above all easy to understand guide but I am also looking for things to use RegEx's for, it's all well and good reading about it but if you never use them then they will not stick in your mind. I have already found…

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• ANTLR expressions rewrite intermediate tree

  - by user313856

  For expressions like 3+4 I would like to use the value 7 in an intermediate representation tree. I cannot work out how to get the returns value into a rewrite rule. expression returns [int v]: etc. How do I get expression.v into WR? At the moment I get (+ 3 4), I want (7) |^( WRITE c=expression) - ^(WRINT ^(INTC…

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• Regular expression required

  - by KhanS

  I have a regular expression "^[a-zA-Z+#-.0-9]{1,5}$" which validates that the word contains alpha-numeric characters and few special characters and length sould not be more than 5 characters. How do I make this regular expression to accept a maximum of five words matching the above regular expression.

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• How the C# compiler treats query expressions ?(Dotnet 3.5, C#3.0)

  - by Newbie

  Going thru one of my favourite authors question What’s the hardest or most misunderstood aspect of LINQ? I am basically looking for the answer of the question: How the C# compiler treats query expressions Thanks

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• Python regular expressions with more than 100 groups?

  - by Evan Fosmark

  Is there any way to beat the 100-group limit for regular expressions in Python? Also, could someone explain why there is a limit. Thanks.

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• Regular expression

  - by rajanikant

  can any one tell me regular expression for postalcode of amusterdum netherlands for validation

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• Multiple bindings expressions in one statement

  - by Abhijeet Patel

  Does WPF support multiple binding expressions in one statement? Something along the lines of the following: <TextBlock Text="{Binding Path=OrderID} shipped on {Binding Path=OrderDate}"/> I'm guessing that it does but I think I just don't have the correct syntax.

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• regular expressions for class name

  - by user576701

  i need a regular expressions string to get all anchor tags in a page with a specific css class name, in c#/vb.net this is what i got so far "<a.*?href=""(.*?)"".*?>(.*?)</a>" but my attempts to add "class=name" isnt working, also is it possible to find links where the class name appears either before…

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• Lambda Expressions for a 5th Grader

  - by Randy Minder

  If you had to explain Lambda expressions to a 5th grader, how would you do it? And what examples might you give, or resources might you point them to? I may be finding myself in the position of having to teach this to 5th grade level developers and could use some assistance. Thanks very much.

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• Does C use lambda expressions?

  - by shosh

  And, if it does, how do you use one? (syntax) Also, why does or why doesn't C support lambda expressions?

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