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  • JQuery: How do I perform a callback on JQuery once it's loaded?

    - by Teddyk
    I'm downloading JQuery asynchronously: function addScript(url) { var script = document.createElement('script'); script.src = url; document.getElementsByTagName('head')[0].appendChild(script); } addScript('jquery.js'); // non-jquery code ... // jquery specific code like: $()... As such - how do I call my JQuery specific code once JQuery is loaded (because since I'm downloading my JavaScript asynch - it's not blocking, which is good, but is trying to execute my JQuery specific code before JQuery has been loaded).

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  • How to find same-value rectangular areas of a given size in a matrix most efficiently?

    - by neo
    My problem is very simple but I haven't found an efficient implementation yet. Suppose there is a matrix A like this: 0 0 0 0 0 0 0 4 4 2 2 2 0 0 4 4 2 2 2 0 0 0 0 2 2 2 1 1 0 0 0 0 0 1 1 Now I want to find all starting positions of rectangular areas in this matrix which have a given size. An area is a subset of A where all numbers are the same. Let's say width=2 and height=3. There are 3 areas which have this size: 2 2 2 2 0 0 2 2 2 2 0 0 2 2 2 2 0 0 The result of the function call would be a list of starting positions (x,y starting with 0) of those areas. List((2,1),(3,1),(5,0)) The following is my current implementation. "Areas" are called "surfaces" here. case class Dimension2D(width: Int, height: Int) case class Position2D(x: Int, y: Int) def findFlatSurfaces(matrix: Array[Array[Int]], surfaceSize: Dimension2D): List[Position2D] = { val matrixWidth = matrix.length val matrixHeight = matrix(0).length var resultPositions: List[Position2D] = Nil for (y <- 0 to matrixHeight - surfaceSize.height) { var x = 0 while (x <= matrixWidth - surfaceSize.width) { val topLeft = matrix(x)(y) val topRight = matrix(x + surfaceSize.width - 1)(y) val bottomLeft = matrix(x)(y + surfaceSize.height - 1) val bottomRight = matrix(x + surfaceSize.width - 1)(y + surfaceSize.height - 1) // investigate further if corners are equal if (topLeft == bottomLeft && topLeft == topRight && topLeft == bottomRight) { breakable { for (sx <- x until x + surfaceSize.width; sy <- y until y + surfaceSize.height) { if (matrix(sx)(sy) != topLeft) { x = if (x == sx) sx + 1 else sx break } } // found one! resultPositions ::= Position2D(x, y) x += 1 } } else if (topRight != bottomRight) { // can skip x a bit as there won't be a valid match in current row in this area x += surfaceSize.width } else { x += 1 } } } return resultPositions } I already tried to include some optimizations in it but I am sure that there are far better solutions. Is there a matlab function existing for it which I could port? I'm also wondering whether this problem has its own name as I didn't exactly know what to google for. Thanks for thinking about it! I'm excited to see your proposals or solutions :)

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  • How to create PHP method linking?

    - by Kerry
    I've seen other objects that do this: $obj->method1()->method2(); How do I do that? Is each function just modifying the pointer of an object or returning a pointer? I don't know the proper term for this style -- if anyone could help me with that, it would be great.

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  • How to get the number of columns from a JDBC Resultset?

    - by Sanoj
    I am using CsvJdbc (it is a JDBC-driver for csv-files) to access a csv-file. I don't know how many columns the csv-file contains. How can I get the number of columns? Is there any JDBC-function for this? I can not find any methods for this in java.sql.Resultset. For acessing the file, I use code similar to the example on the CsvJdbc website.

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  • Parsing Domain From URL In PHP

    - by zuk1
    I need to build a function which parses the domain from a url. So: http://google.com/dhasjkdas/sadsdds/sdda/sdads.html or http://www.google.com/dhasjkdas/sadsdds/sdda/sdads.html Would become "google.com" and http://google.co.uk/dhasjkdas/sadsdds/sdda/sdads.html would become "google.co.uk"

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  • PHP Regular Expression to quotations to attributes

    - by atwellpub
    hey Guys, I need to run a string of html through a regex function that checks to see if the attributes are closed in quotes, and if they aren't then close them. for example i want <img src=http://www.domain.com/image.gif border=0> to turn into <img src='http://www.domain.com/image.gif' border='0'> Can anyone help me?

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  • Parsing timestamp with retarded Python

    - by jellybean
    I want to parse a timestamp from a log file that has been written via datetime.datetime.now().strftime('%Y%m%d%H%M%S') and then compute the number of seconds that have passed since this timestamp. I know I could do it with datetime.datetime.strptime to get back a datetime object and then compute a timedelta. Problem is, the strptime function has been introduced with Python 2.5 and I'm using Python2.4.4 (an upgrade is not possible in my context). Any easy way to do this?

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  • $ is not defined in Firefox using jQuery

    - by Alvin
    Hi, Whenever I try to load the following part in <head> tag on firfox browser, I get the message as $ is not define. May I know the reason? I'm trying to load the jquery.js file before loading any custom script after CSS part. <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> $(document).ready(function(){

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  • Why file upload error codes in php miss number '5'?

    - by Majid
    I am writing a custom error handling/reporting function for php file upload and I noticed that the error codes returned is one of numbers 0 to 8 except 5. Is this a typo in the source I am using or is it really this way? And if it is so, I am curious why they have skipped number '5'. Thanks.

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  • C++: Trouble with tr1::bind (C2065)

    - by Rosarch
    I'm getting a compiler error with bind: using namespace std; bool odp(int arg1, int arg2); // ... find_if(vec.begin(), vec.end(), tr1::bind(odp, iValue, _1)); // C2065 My goal is to curry odp(), so its first argument is iValue, and apply that function in find_if. The error: C2065: '_1' : undeclared identifier. What am I doing wrong?

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  • OpenGL: How to clear only a part of the screen?

    - by Newbie
    Is it possible to not clear entire screen when using glClear() function? I need to clear only a part of the screen to save some rendering time, otherwise i would have to redraw half of the screen every frame, even if nothing is happening on the other half. Of course this should be done as quickly (or quickier) as the glClear() is now.

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  • reference a form inside a selector in jquery

    - by ooo
    if i have this code in jquery: var parentDiv = $(this).parent('.copyInstance'); inside this div there is a form. how do i reference a form element inside this selector? i want something like this $.post($(parentDiv + " Form").attr('action'), $(parentDiv + " Form").serialize(), function(data) { }); but this above doesn't seem to work

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  • WPF User Control loading twice

    - by deepak
    Hai am having a WPF user control, when i use that control in another window it loading twice, so its throwing exception for me, coz am having some function in usercontrol_loaded event, when it loading twice it throwing error, is there any other way to check if the usercontrol is loaded like that, else how to solve this issue.

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  • Using functions and environments

    - by Eduardo Leoni
    Following the recent discussions here (e.g. 1, 2 ) I am now using environments in some of my code. My question is, how do I create functions that modify environments according to its arguments? For example: y <- new.env() with(y, x <- 1) f <- function(env,z) { with(env, x+z) } f(y,z=1) throws Error in eval(expr, envir, enclos) : object 'z' not found I am using environments to keep concurrently two sets of simulations apart (without refactoring my code, which I wrote for a single set of experiments).

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