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  • regular expression for string in c

    - by darkie15
    Hi All, I am working writing a regular expression used to validate string in C. Here is to what I have gone so far '^"[A-Za-z0-9]*[\t\n]*"$' for rules - A string should begin with double quotes - May not contain a newline character However, I am not able to capture the rule for allowing '\' or '"' in a string if preceded with '\'. Here is what I tried: '^"[A-Za-z0-9]*[\t\n]*[\\\|\\"]?"$' But this doesn't seem to work. What might be wrong with the regular expression here? Regards, darkie15

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  • Remove duplicate characters using a regular expression

    - by Alex
    I need to Match the second and subsequent occurances of the * character using a regular expression. I'm actually using the Replace method to remove them so here's some examples of before and after: test* -> test* (no change) *test* -> *test test** *e -> test* e Is it possible to do this with a regular expression? Thanks

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  • Maximum Row in DBMS

    - by Am1rr3zA
    Is there any limit to maximum row of table in DBMS (specially MySQL)? I want create table for saving logfile and it's row increase so fast I want know what shoud I do to prevent any problem.

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  • ServicedComponent not being disposed in finaliser

    - by David Gray Wright
    Questions needing answers : Does the finalizer of the client side ServicedComponent call ServicedComponent.DisposeObject or Dispose? How should destruction (release of memory) occur in the com server in realtion to its usage in the client? Basically - we are reaching a 2 gig limit on process size (memory) of the COM server as memory is not being released - is the solution to call explicitly call Dispose or use the using statement in the client?

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  • Getting keypress cursor co-ordinates

    - by nijikunai
    I'm writing a simple browser based ide with intellisense (code completion) support. So whenever the user inserts a dot (.) character, I need to display a div element (as context menu) near the cursor. Can this can be done and if yes how? Thanks in advance!

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  • Convert text to xml

    - by Nave
    I want to convert a tab delimited text file to a XML file. I was able to do it with a single character delimiter. But how do i extend it to tabs? I am coding in C# and using Visual Studio 2010.

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  • JQuery Attribute Manipulation

    - by TTCG
    When I search on the Internet about JQuery and I got the jquery cheat sheet. At there, I am very confused about how to use the following under which condition. Pls help me. [attribute|=val] [attribute*=val] [attribute~=val] [attribute$=val] [attribute=val] [attribute!=val] [attribute^=val] [attribute] [attribute1=val1] [attribute2=val2] What are the functions of these special character *, ~, $, !, ^? Thanks very much.

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  • Rails 2.3: How to create this SQL into a named_scope

    - by randombits
    Having a bit of difficulty figuring out how to create a named_scope from this SQL query: select * from foo where id NOT IN (select foo_id from bar) AND foo.category = ? ORDER BY RAND() LIMIT 1; Category should be variable to change. What's the most efficient way the named_scope can be written for the problem above?

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  • Remove Trailing Slash From Batch File Input

    - by Brook
    I have a batch file that I want to improve. Instead of requiring a user to provide a folder path without a trailing slash, is there an easy way for me to just remove the last character from the path if there is a slash on the end? :START @echo What folder do you want to process? (Provide a path without a closing backslash) set /p datapath= ::Is string empty? IF X%datapath% == X GOTO:START ::Does string have a trailing slash? IF %datapath:~-1%==\ GOTO:START

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  • Efective way to avoid integer overflow when multiplying?

    - by Jonathan
    Hi, I'm working on a hash function which gets a string as input. Right now I'm doing a loop and inside the hash (an int variable) is being multiplied by a value and then the ASCII code for the current character is added to the mix. hash = hash * seed + string[i] But sometimes, if the string is big enough there is an integer overflow there, what can I do to avoid it while maintaining the same hash structure? Maybe a bit operation included inside the loop?

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  • jquery - validate characters on keypress?

    - by TwixxyKit
    I have a form text field that I want to allow only numbers and letters in. (i.e., no #$!, etc...) Is there a way to throw up an error and prevent the keypress from actually outputting anything if the user tries to use any character other than numbers and letters? I've been trying to find a plugin, but haven't really found anything that does this...

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  • Using Regular Expression in VC++

    - by Benit
    Hi , I am finding Email ids in mu project, where I am preprocessing the input using some Regular Expression. RegExpPhone6.RegComp("[\[\{\(][ -]?[s][h][i][f][t][ -]?[+-][2][ -]?[\]\}\)]"); Here while I am compiling i am getting a warning msg like Warning 39 warning C4129: ')' : unrecognized character escape sequence How can i resolve this ? Why this is occuring and Where will it affect? Kindly help me...

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  • Huffman coding two characters as one

    - by Adomas
    Hi, I need huffman code(best in python or in java), which could encode text not by one character (a = 10, b = 11), but by two (ab = 11, ag = 10). Is it possible and if yes, where could i find it, maybe it's somewhere in the internet and i just can'd find it?

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  • enabling the "return button" in a UITextField keyboard (objective-c/iphone)

    - by peter61
    When I start editing a UITextField, I have the "Clear When Editing Begins" option checked so it starts off with no text. However, the "Return" button is grayed out until you type at least one character. I've seen other iphone apps where the "Return" button is not grayed out (and if you press it with no text, then it goes back to what the text used to be). How is this done? Thanks.

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  • count and fetch rows in php

    - by Mac Taylor
    hey guys i have a table in my mysql database named (names) now everyone can save their real names now i want to query this table and find out how many times these names used forexample the output should be : Jakob (20) Jenny (17) now this is my own code : list($usernames) =mysql_fetch_row(mysql_query('SELECT name FROM table_user GROUP BY name ORDER BY COUNT(name) DESC LIMIT 50 ')); list($c) =mysql_num_rows(mysql_query('SELECT COUNT(name) FROM table_user GROUP BY name ')); print $usernames.'('.$c.')' is this a correct approach ?!

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  • Why does Java's hashCode() in String use 31 as a multiplier?

    - by jacobko
    In Java, the hash code for a String object is computed as s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1] using int arithmetic, where s[i] is the ith character of the string, n is the length of the string, and ^ indicates exponentiation. Why is 31 used as a multiplier? I understand that the multiplier should be a relatively large prime number. So why not 29, or 37, or even 97?

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