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  • What is the difference between printf() and puts() in C?

    - by alex
    First up, I should let you know that I am learning C, so my apologies if this question seems stupid to a more advanced developer. I know you can print with printf() and puts(). I can also see that printf() allows you to embed variables inside and do some stuff like formatting. Is puts() merely a primitive version of printf(). Should it be used for every possible printf() without string interpolation? Thanks

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  • difference between where and nested queries

    - by Chris H
    I'm not able to figure out the difference between these queries. I'm pretty sure that the first one is an equi-join. I'm not sure how the second one ISN'T the same as the first. The sub query in #2 selects all Ids from S, and then it returns all R's that also have those ID's, no? SELECT R.cname FROM R, S, WHERE R.Id = S.Id SELECT R.cname FROM R WHERE R.Id IN (SELECT S.Id FROM S)

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  • _REQUIREDNAME always nil

    - by Nali4Freedom
    I'm trying to use the method for naming a lua package after the filename mentioned here, however _REQUIREDNAME is never defined. For example I have these two files samplePackage.lua: print("_REQUIREDNAME: ", _REQUIREDNAME) return nil; packageTest.lua: require "samplePackage" And when I run packageTest.lua it outputs > _REQUIREDNAME: nil I also couldn't find any mention of _REQUIREDNAME in the Lua 5.1 Refrence manual, so was this removed from the language, or am I missing something?

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  • PHP: Check if it has been one week since timestamp

    - by Rudi
    Hi guys, Let's assume: $time = '2010-05-17 02:49:30' // (retrieved from MySQL TIMESTAMP field) How do I do the following in PHP: 1) Check if it has been more than one week since this time has passed? 2) Assuming "false" on (1), find out how much more time until the one week mark, rounded to days and hours remaining. I know this is pretty straightforward, but it uses a very specific syntax. Having never played with time calculations before, I'd appreciate some guidance. Thanks!

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  • See socket options on existing sockets created by other apps?

    - by nailer
    I'd like to test whether particular socket options have been set on an existing socket. Ie, pretty much everything you can see in: #!/usr/bin/env python '''See possible TCP socket options''' import socket sockettypelist = [x for x in dir(socket) if x.startswith('SO_')] sockettypelist.sort() for sockettype in sockettypelist: print sockettype Anyone know how I can see the options on existing sockets, ie those created by other processes? Alas nearly all the documentation I read on Python socket programming is about making new sockets.

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  • What UIKit elements can be used to replicate the App Store/iTunes Store paged grid?

    - by user350523
    I'm new to Cocoa Touch, so this might be pretty easy, but I can't seem to figure out what UIKit elements were used to create a grid like this? Is this simply a UITableView with a pagination controller? If so, how'd they style it like this? Thanks! PS: I'm not allowed to post images yet, i guess. hopefully the link works... http://img576.imageshack.us/img576/8523/screenshot20100525at941.png

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  • Returning an error code in Erlang

    - by Zubair
    I'm writing some Erlang code and I'm very unsure whether I should let everything fail fast. One problem I find with fail fast is that for the developer/user the exception generated is pretty meaningless. Any idea what I should return which would not give esoteric and hard to read stack traces?

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  • Using JQuery to Style form elements

    - by John
    Hi, I've seen jquery used to change a form select drop down box in to a 'pretty' drop down list widget. I can't remember where I saw this but does anyone have any links or example code which show examples of how to use jquery to style form elements? I'd prefer it if it was code rather than a built in plug in. Thanks

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  • In Java, is there a way to write a string literal without having to escape quotes?

    - by Matthew
    Say you have a String literal with a lot of quotation marks inside it. You could escape them all, but it's a pain, and difficult to read. In some languages, you can just do this: foo = '"Hello, World"'; In Java, however, '' is used for chars, so you can't use it for Strings this way. Some languages have syntax to work around this. For example, in python, you can do this: """A pretty "convenient" string""" Does Java have anything similar?

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  • Python 3.2: How to pass a dictionary into str.format()

    - by Robert Dailey
    I've been reading the Python 3.2 docs about string formatting but it hasn't really helped me with this particular problem. Here is what I'm trying to do: stats = { 'copied': 5, 'skipped': 14 } print( 'Copied: {copied}, Skipped: {skipped}'.format( stats ) ) The above code will not work because the format() call is not reading the dictionary values and using those in place of my format placeholders. How can I modify my code to work with my dictionary?

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  • Grid view w/ progress bars?

    - by Mark
    Trying to decide on the best element to use for a grid view, pretty much exactly like the one you'd see in uTorrent or any other upload/download client. Specifically, I want to have a 'progress' column too (with progress bars). Using VS2010/.NET4. What would you recommend?

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  • What should I learn & use to become a pro in PHP & Python Web development?

    - by pecker
    Hello, I'll just show some code to show how I do web development in PHP. <html> <head> <title>Example #3 TDavid's Very First PHP Script ever!</title> </head> <? print(Date("m/j/y")); require_once("somefile.php"); $mysql_db = "DATABASE NAME"; $mysql_user = "YOUR MYSQL USERNAME"; $mysql_pass = "YOUR MYSQL PASSWORD"; $mysql_link = mysql_connect("localhost", $mysql_user, $mysql_pass); mysql_select_db($mysql_db, $mysql_link); $result = mysql_query("SELECT impressions from tds_counter where COUNT_ID='$cid'", $mysql_link); if(mysql_num_rows($result)) { mysql_query("UPDATE tds_counter set impressions=impressions+1 where COUNT_ID='$cid'", $mysql_link); $row = mysql_fetch_row($result); if(!$inv) { print("$row[0]"); } } ?> <body> </body> </html> Thats it. I write every file like this. Recently, I learnt OOP and started using classes & objects in PHP. I hear that there are many frameworks there for PHP. They say that one must use these libraries. But I feel they are just making things complicated. Anyway, this is how I've been doing my web development. Now, I want to improve this. and make it professional. Also I want to move to Python. I searched SO archives and found everyone suggesting Django. But, can any one give me some idea about how web development in Python works? user (client) request for page --- webserver(-embedded PHP interpreter) ---- Server side(PHP) Script --- MySQL Server. Now, is it that instead of PHP interpreter there is python interpreter & instead of php script there is python script, which contains both HTML & python (embedded in some kind of python tags). Python script connects to database server and fetches some data which will be printed as HTML. or is it different in python world? Is this Django thing like frameworks for PHP? Can't one code in python without using Django. Because, I never encountered any post without django Please give me some kick start.

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  • C++/WinAPI - Hardcoding the resources in application

    - by HardCoder1986
    Hello! I have some code which shows a simple dialog box and handles user action (written using plain WinAPI). // Display dialog and handle user action LRESULT choice = DialogBoxParam(NULL, MAKEINTRESOURCE(AP_IDD_DIALOG), NULL, (DLGPROC)DialogCallback, NULL); Is there any way to hardcode the resource file dialog.rc, which is used to build the dialog ?(I would like to get rid of .rc files and I'm pretty sure there is a way, yet I don't know what it is :)

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  • Perl, "closure" using Hash

    - by Mike
    I would like to have a subroutine as a member of a hash which is able to have access to other hash members. For example sub setup { %a = ( txt => "hello world", print_hello => sub { print ${txt}; }) return %a } my %obj = setup(); $obj{print_hello}; Ideally this would output "hello world"

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  • Select the next N elements of an IEnumerable<T>

    - by sassafrass
    Say you've got some IEnumerable called S of length N. I would like to select all continuous subsequences of length n <= N from S. If S were, say, a string, this'd be pretty easy. There are (S.Length - n + 1) subsequences of length n. For example, "abcdefg" is length (7), so that means it has (5) substrings of length (3): "abc", "bcd", "cde", "def", "efg". But S could be any IEnumerable, so this route isn't open. How do I use extension methods to solve this?

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  • Printing prn file in window service.

    - by Asad
    I am unable to print prn file on network printer from .Net window Service. I use File.Copy method but it does not work. I use cmd.exe through Process.Start method but it does not work. But If I copy the same code in windows form application then it works fine. Can anybody help me.

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