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  • Is it alright to call len() in a loop's conditional statement?

    - by DormoTheNord
    In C, it is considered bad practice to call strlen like this: for ( i = 0; strlen ( str ) != foo; i++ ) { // stuff } The reason, of course, is that it is inefficient since it "counts" the characters in a string multiple times. However, in Python, I see code like this quite often: for i in range ( 0, len ( list ) ): # stuff Is this bad practice? Should I store the result of len() in a variable and use that?

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  • Source Code Browser

    - by James Fielding
    Hello I'm looking for a piece of relatively simple software to browse large C++ project. What I would like is something that is somewhere between a simple text editor and a full-blown IDE like Eclipse. I would like syntax highlighting, a way to see all classes/methods defined in a file, a way to find where a particular method is called from and where a variable is declared/defined. Any ideas? Thank you!

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  • How can I retrieve all the returned variables from a function?

    - by user1447941
    import random def some_function(): example = random.randint(0, 1) if example == 1: other_example = 2 else: return False return example, other_example With this example, there is a chance that either one or two variables will be returned. Usually, for one variable I'd use var = some_function() while for two, var, var2 = some_function(). How can I tell how many variables are being returned by the function?

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  • Make get function Sycronous / Javascript

    - by DDL449
    I'm experiencing a problem of $.get function. The url contains JSON this is my code: xyz = null $.get('http://www.someurl.com/123=json', function(data) { var xyz = data.positions[0].latitude; }); alert(xyz); //some more code using xyz variable I know that xyz will alert a null result because the $.get is asychronous. So is there any way I can use the xyz outside this get function? Thank you

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  • How to insert item which type is QString to a ComboBox in Qt?

    - by Hanny
    I have an item which type is QString: for example: QString name="Name" the question is: How can I put this name variable into a combobox? I've read the Qt 4.6.2 docs but still cant figure out how to do that. Please dont refer me back to that Qt 4.6.2 docs again.. Please help me ASAP!! this is really urgent! thank you very much!! :)

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  • PHP+MySQL Update TimeStamp and get NOW() back

    - by Ben
    Is it possible to merge these two mysql queries into one? I want to get NOW() returned to a php variable. mysql_query('INSERT INTO translate (IDRef, RefType, Lang, Text, LastChangeTS) VALUES ('.$id.', \''.$reftype.'\', \''.$lang.'\', \''.$text.'\', NOW()) ON DUPLICATE KEY UPDATE text = \''.$text.'\', LastChangeTS = NOW()'); mysql_query('SELECT LastChangeTS FROM translate WHERE IDRef = '.$id.' AND RefType = \''.$reftype.'\' AND Lang = \''.$lang.'\'');

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  • Accessing char* after assigning its value C

    - by iSight
    Hi, I have assign the value of a member variable as under: myValue = (char*)malloc(strlen(inValue) * sizeof(char)); strcpy(mValue, inValue); while assigning it the value was proper as(taking printf output): http://www.w3.org/2001/XMLSchema But, when i get its value after wards i get it as: http://www.w3.org/2001/XMLSchema(! What could be the problem for this issue

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  • pointer&dynamic memory

    - by gcc
    how many methods are there taking input by using with pointer and dynamic memory input 3 1 2 n k l 2 1 2 p 4 55 62 * # x x is stop character and first input 3 is for another variable int hakko; only hakko use first input the others will be hold in one pointer and input size not determined

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  • SQL Server Text type v.s. varchar data type

    - by George2
    Hello everyone, I have variable length character and want to store in SQL Server (2005) database. I want to learn some best practices about how to choose TEXT SQL type or choose VARCHAR SQL type, pros and cons in performance/footprint/function. thanks in advance, George

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  • CSS - How can I center a div within a div?

    - by Spines
    I have an outer div that is 800px wide. I have an inner div that could be anywhere from 200 to 600px wide. I know how to center the inner div within the outer one if I set the inner one to have a specific width, but how do I center it since its a variable width? Is there a way to set the div to only be the width of the elements inside of it, rather than having it expand to fill its containing div?

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  • Removing part of a string in PHP

    - by Nik
    I'm trying to take a query: SHOW TABLES; which will display a bunch of tables with the chat_ prefix. I want to remove the chat_ prefix from the string, format the variable (with a link), and display it. How is this accomplished?

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  • Time not entered in mysql ? Java

    - by Nitesh Panchal
    Hello, I have a datetime field in mysql table and i am using JPA for persisting data but only date goes in database. Time always shows 00:00:00. What should i do? I am not doing any manipulation with Date. All i do is to assign new Date() to a variable and store it in database. What am i doing wrong?

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  • Workflow for reading and writing files

    - by AIR_PhillipSenn
    In Workflow for reading and writing files the authors use these two lines of code: var file = air.File.documentsDirectory; file = file.resolvePath("AIR Test/testFile.txt"); But I think that it's using one variable for two different meanings, isn't it? Wouldn't it be better to write them as: var myDocumentsDirectory = air.File.documentsDirectory; var myTestFile = myDocumentsDirectory.resolvePath("AIR Test/testFile.txt");

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  • Php static variables across sessions

    - by pistacchio
    Hi, In ASP.NET if I declare a variable (or object) static (or if I make a singleton) I can have it persist across multiple sessions of multiple users (it it registered in a server scope) so that I don't have to initialize it at every request. Is there such a feature in PHP? Thanks

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  • Why do I need the isset() function in php?

    - by Chris
    I am trying to understand the difference between this: if (isset($_POST['Submit'])) { //do something } and if ($_POST['Submit']) { //do something } It seems to me that if the $_POST['Submit'] variable is true, then it is set. Why would I need the isset() function in this case?

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  • I want the actual file name that is returned by a PHP script

    - by Aymon Fournier
    I am writing a python script that downloads a file given by a URL. Unfortuneatly the URL is in the form of a PHP script i.e. www.website.com/generatefilename.php?file=5233 If you visit the link in a browser, you are prompted to download the actual file and extension. I need to send this link to the downloader, but I can't send the downloader the PHP link. How would I get the full file name in a usable variable?

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  • mod_rewrite - Don't get a second rule work

    - by poru
    I want to have a url like this: domain.com/css/site.css?test=234 Rule: RewriteEngine On RewriteRule ^([a-z]+)/$ $1.php RewriteRule ^css/([a-zA-Z0-9]+).css?count=(.*)$ css.php?f=$1&test=$2 But I get every time a 404: Not found (site.css) If I have a rule like that it works, just without getting the $_GET-Variable: RewriteEngine On RewriteRule ^([a-z]+)/$ $1.php RewriteRule ^css/([a-zA-Z0-9]+).css$ css.php?f=$1

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  • Customs toString in Java not giving desired output and throwing error

    - by user2972048
    I am writing a program in Java to accept and validate dates according to the Gregorian Calendar. My public boolean setDate(String aDate) function for an incorrect entry is suppose to change the boolean goodDate variable to false. That variable is suppose tell the toString function, when called, to output "Invalid Entry" but it does not. My public boolean setDate(int d, int m, int y) function works fine though. I've only included the problem parts as its a long piece of code. Thanks public boolean setDate(int day, int month, int year){ // If 1 <= day <= 31, 1 <= month <= 12, and 0 <= year <= 9999 & the day match with the month // then set object to this date and return true // Otherwise,return false (and do nothing) boolean correct = isTrueDate(day, month, year); if(correct){ this.day = day; this.month = month; this.year = year; return true; }else{ goodDate = false; return false; } //return false; } public boolean setDate(String aDate){ // If aDate is of the form "dd/mm/yyyy" or "d/mm/yyyy" // Then set the object to this date and return true. // Otherwise, return false (and do nothing) Date d = new Date(aDate); boolean correct = isTrueDate(d.day, d.month, d.year); if(correct){ this.day = d.day; this.month = d.month; this.year = d.year; return true; }else{ goodDate = false; return false; } } public String toString(){ // outputs a String of the form "dd/mm/yyyy" // where dd must be 2 digits (with leading zero if needed) // mm must be 2 digits (with leading zero if needed) // yyyy must be 4 digits (with leading zeros if needed) String day1; String month1; String year1; if(day<10){ day1 = "0" + Integer.toString(this.day); } else{ day1 = Integer.toString(this.day); } if(month<10){ month1 = "0" + Integer.toString(this.month); } else{ month1 = Integer.toString(this.month); } if(year<10){ year1 = "00" + Integer.toString(this.year); } else{ year1 = Integer.toString(this.year); } if(goodDate){ return day1 +"/" +month1 +"/" + year1; }else{ goodDate = true; return "Invalid Entry"; } } Thank you

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  • Is there any C/C++ editor in Linux that shows errors while typing

    - by MetallicPriest
    The Visual C++ editor has a great feature which is that it underlines errors with a red line while typing the code. So for example, if you are using a variable that is not declared, it will underline it with a red curly line. In this way, the programmer can resolve a lot of errors while typing and doesn't have to wait for compiling for noticing them. Now my question is, is there any editor for Linux that has this great feature?

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