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• Restrict characters used in a string

  - by Jeremy Rudd

  How do I restrict a string to whitelisted characters? // "HOW am I to understand; this is, BAD" $str = restrictTo($str,"0-9a-z,. "); // " am I to understand this is, " Is there an inbuilt function in PHP that does something close? I can't formulate a regular expression for this though :(

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• Retrieve all hashtags from a tweet in a PHP function

  - by snorpey

  Hi. I want to retrieve all hashtags from a tweet using a PHP function. I know someone asked a similar question here, but there is no hint how exactly to implement this in PHP. Since I'm not very familiar with regular expressions, don't know how to write a function that returns an array of all hashtags in a tweet. So how do I do this, using the following regular expression: #\S*\w

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• Change a regexp in application.js from rails

  - by Markus

  I wand to change the regular expression in my application.js file from within a rails controller. Is that possible?

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• Haskell Tuple Size Limit

  - by SHiNKiROU

  Why I can't construct large tuples in Haskell? Why there's a tuple size limit? Prelude> (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1) <interactive>:1:0: No instance for (Show (t, t1, t2, ... t23)) arising from a use of `print' at <interactive>:1:0-48 Possible fix: add an instance declaration for (Show (t, t1, t2, ... t23)) In a stmt of a 'do' expression: print it

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• check that int array contains !=0 value using lambda

  - by netmajor

  hey, I have two-dimension array List<List<int>> boardArray How can I enumerate throw this array to check that it contains other value than 0 ? I think about boardArray.Contains and ForEach ,cause it return bool value but I don't have too much experience with lambda expression :/ Please help :)

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• InfoPath: How to display a third column of a datasource?

  - by Michael Bray

  I have an InfoPath 2007 browser-enabled form that has a datasource with three columns, let's say columns A, B, and C. I have a dropdown that is keyed to column A and displays column B. Column C contains some data that I want to display in an expression box, and that I also want to use in some data validation against another field on the form. I'm looking for some help on how to reference that column C for displaying and use in validation. Thanks!

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• Numeric test when using the conditional operator

  - by lupuslupus

  In bash, why doesn't this work: $ echo $((1 -gt 2 ? 3 : 4)) bash: 1 -gt 2 ? 3 : 4: syntax error in expression (error token is "2 ? 3 : 4") Neither does this: $ echo $(((1 -gt 2) ? 3 : 4)) bash: (1 -gt 2) ? 3 : 4: missing `)' (error token is "2) ? 3 : 4")

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• Is there a decent technique for SSIS Derived Column date formatting?

  - by theog

  I just had to write the most redonkulous expression in an SSIS Derived Column to get dates formatted like "01-JAN-2010".  It lookes like this:        There's got to be a better way... isn't there?

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• passing Func<TSource, TKey> keySelector error

  - by user338429

  static void Main() { string[] a = { "a", "asd", "bdfsd", "we" }; a = a.OrderBy(fun).ToArray(); } private static int fun(string s) { return s.Length; } its is giving compile time error . I know that we can do this with Lambda expression like this. a.OrderBy(s=>s.Length).ToArray(); but i want to this do by defining different function . What mistake i have done?

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• get specific part from url

  - by 3gwebtrain

  hi, my window.location is "F:/html5/home.html", from my location i need to get the file name like this "home.html", to do this, how to i use the regular expression command? any one help me?

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• Reflection problem - Type Safety Warning

  - by jax

  Class<? extends Algorithm> alg = AlgorithmAllFrom9AndLastFrom10Impl.class Constructor<Algorithm> c = alg.getConstructors()[0]; For "alg.getConstructors()[0];" I am getting a warning in eclipse Type safety: The expression of type Constructor needs unchecked conversion to conform to Constructor How do I fix this?

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• How can i check to see if a specific integer is within a array? For a switch statement.

  - by Tapha

  Is there a specific way to check for a specific integer within a switch statment. For example. $user = $ads[$i]->from_user; To check for the number 2 as $i in the above expression.

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• Function of: if(/(file|http).*/.test(url)) { }

  - by WmasterJ

  I am wondering what this technique is called and what it does. It seems to be validating some regular expression on the variable url. I am customizing another persons code: var url = document.getElementById("editorURL").value; if(/(file|http).*/.test(url)) { } Maybe someone has a link to an article that explains this a bit more in-depth?

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• Integer separated by comma

  - by FrenchiInLa

  What's the best regular expression for integer separated by comma? It can also contain space between comma, and the field is not required which means it could be blank. 123,98549 43446 etc..

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• Custom Control in Silverlight ListBox

  - by jaime

  I have a custom control I created from a expression design I created and exported to xaml. I have put in it a bound itemtemplate/datatemplate of a ListBox contorl. It doesn't seem to be rendering more than once and/or it is rendering each item in the same place(kind of like the same x,y coordinates.

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• Translate LINQ to sql statement

  - by zielu1

  Hi, I want to translate LINQ expression tree to SQL statement and I don't want to write my own code for this. Example: var query = from c in Customers where c.Country == "UK" && c.City == "London" select c); To SELECT ... FROM Customers AS c WHERE c.Country = "UK" AND c.City = "London" I know DataContext.Log, but I want to use: query.ToSqlStatementString() Thanks

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• Abstract over X

  - by Bruno Bieth

  Sorry for this english related question but I only came across that expression in the context of IT. What does abstracting over something mean ? For example abstracting over objects or abstracting over classes. Thanks

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• Turning a actionscript string with a url into a HTML link

  - by daidai

  I'm retrieving an unformatted String from a twitter feed. I want to be able to turn a text URL (http://blah.com/qwerty/) into a link but don't know how...is there a handy regular expression for this?

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• How to match a variable list of items separated by commas

  - by user261915

  I want to turn something like this CS 240, CS 246, ECE 222, ... (more or less); Software Engineering students only into ('CS 240', 'CS 246', 'ECE 222', 'ECE 220') in Python, code that matches a single course looks like >>> re.search('([A-Z]{2,5} \d{3})', 'SE 112').groups() ('SE 112',) I prefer a regular expression only method because I have a bunch of other alternate reg exps using '|' to combine them. However, a method with split is acceptable.

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• Need some help with a NHibernate Query

  - by cwap

  Hi all Say I got 3 entities: Business, Employee and Payment. A payment has a foreign key to an Employee, while the Employee has an foreign key to a business. Now, I want to create a query which gives me all payments for a given business. I really don't have a clue about how to do this - I guess I want something like: mySession.CreateCriteria<Payment>() .Add(Criterion.Expression.Eq(/* Employee_FK => Employee.Business_FK == BusinessID */); Any help would be greatly appreciated :)

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• How can i check to see if a specific integer is within array?

  - by Tapha

  Is there a specific way to check for a specific integer within a switch statment. For example. $user = $ads[$i]->from_user; To check for the number 2 as $i in the above expression.

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• How do I perform multiple replacements with Perl?

  - by duenguyen

  I have Perl code: my $s = "The+quick+brown+fox+jumps+over+the+lazy+dog+that+is+my+dog"; I want to replace every + with space and dog with cat. I have this regular expression: $s =~ s/\+(.*)dog/ ${1}cat/g; But, it only matches the first occurrence of + and last dog.

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• "Slice" out one element from a python dictionary

  - by BCS

  I have a dictionary: D = { "foo" : "bar", "baz" : "bip" } and I want to create new dictionary that has a copy of one of it's elements k. So if k = "baz": R = { "baz" : "bip" } what I'v got now is: R = { k : D[k] } But in my case k is a complex expression and I've got a whole stack of these. Caching k in a temporary looks about as ugly as the original option. What I'm looking for is a better (cleaner) way to do this.

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• Very Simple Regex Problem

  - by Sunil

  Hello I want a regular expression which will ignore the sentence containing "XYZ" character. I am using this but this is not working "(.+[^XYZ])" Thanks in advance

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• _=> what does this mean in Lambda expressions?

  - by user216571

  What does an lambda expression like _= expr mean? What is the purpose of _ as input to lambda?

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