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• How to create sample filter in VirtualDub

  - by mykhaylo

  I would like to create a simple filter for VirtualDub application. The filter had to invert colors on image. How to create a simple loop, which would invert the colors for each pixel?

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• javascript: use getElementsByName for 'this'?

  - by stelmate

  I need to get some children elements and loop over them using inline javascript for a onmouseover event. When I try to use this.getElementsByName I'm getting an error that the object does not support this property. I was under the impression that getElementsByName work for element objects which I thought 'this' would be considered. Anyone have any other ideas on how I can achieve this?

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• Get last/newly added element in std::set

  - by Dave17

  can you get the last or newly added element in std::set? for example say if the loop runs to collect the elements to fill in the std::set. if on the first run the set was, [0] "A" [1] "B" [2] "D" and, on second run, the set becomes [0] "A" [1] "B" [2] "C" [3] "D" How would you check if 'C' is the new element that was added?

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• Optimizing grep (or using AWK) in a shell script

  - by Ode

  Hi - In my shell script, I am trying to search using terms found in a $sourcefile against the same $targetfile over and over. My $sourcefile is formatted as such: pattern1 pattern2 etc... The inefficient loop I have to search with is: for line in $(< $sourcefile);do fgrep $line $targetfile | fgrep "RID" >> $outputfile done I understand it would be possible to improve this by either loading the whole $targetfile into memory, or perhaps by using AWK? Thanks

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• Converting double[][] in to float[][]

  - by cer_albastru

  Hi, I was wondering if there is a way of converting a double [][] in to a float[][] in Java? I currently have a for loop in my code that does this and am looking for a better and cleaner way. Any ideas would be appreciated, Thanks,

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• How to directly access a certain part of a text file in g++?

  - by Phenom

  I have a text file containing a number of records. Each record is stored on a single line that is 100 characters long. Let's say I want to directly access the nth record. I could do it using a for loop, reading in n lines until I get to the record. But how could I access it directly?

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• in R, how can i save the value of "print"

  - by alex

  in R , when i use "print", i can see all the values, but how can i save this as a vector for example, in for loop, for (i in 1:10), i want the value of A , when i= 1,2,3,4..... but if i use the x=A, it only have the final value of A which is the value when i = 10. so , how can i save the vaule in print(A)

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• Fast way to compute the minimal distance of two sets of k-dimensional vectors

  - by vrld

  I two sets of k-dimensional vectors, where k is around 500 and the number of vectors is usually smaller. I want to compute the (arbitrarily defined) minimal distance between the two sets. A naive approach would be this: (loop for a in set1 for b in set2 minimizing (distance a b)) However, this requires O(n² * distance) computations. Is there a faster way of doing this?

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• retreive the url of the page an image sits on

  - by Ayyash

  I'm trying to log URLs that access broken images, using an HTTP module to catch those images when accessed. How do you retrieve the URL where that image sits on? is there a way to do it the other way round too? That is, loop through images served in a URL and decide which ones are broken. This is all in ASP.NET with C#.

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• Python execute a function for X seconds

  - by theactiveactor

  I'm looking for a way for a function to take actions based on how long it has been executing. For example, my function would loop continuously until 5 seconds has elapsed, in which case it returns immediately. Any suggestions?

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• JQuery: Get SRC for each image that has specific atrtibute

  - by adbox

  Hey Guys, I am wokring on a dialog, where in execution I want to round up all items that have a specific attribute and place an attribute value of their's into a comma delited list. This is as far as I have gotten, which isnt far. buttons: { 'Hook': function(){ $('.grid_pic:has(border=3)').(loop through id's, grab src, build variable with srcs comma delimeited) } Any ideas?

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• Why isn't Chrome displaying my div?

  - by Kyle Sevenoaks

  Click here to see a simple example of what I want. It's really easy, but for some reason Google won't display it. It's part of a foreach loop, if needed I can add other codes. There is nothing else in the rest of the css to mess with this, I have checked about 10 times. Thanks.

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• Convert Nulls to Empty String in an object.

  - by John

  What is the easiest way to take an objects and convert any of its values from null to string.empty ? I was thinking about a routine that I can pass in any object, but I am not sure how to loop through all the values.

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• Looping over all tabs in IE 8

  - by Quandary

  Question: I want to loop over all open tabs in Internet Exporer (for all open IE windows) and save the URL in a text file. How can I do that ? I have windows 7 32 bit and IE 8. Code for Firefox/Google chrome would also be welcome.

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• I need a row Added event for a DataGridView

  - by tizzyfoe

  What i want to do is set the background of a row based on some criteria, but the datagrid will be fairly large so i don't want to have to loop over all the rows again. The rows get created me doing something like "myDataGridView.DataSource = MyDataSource, so the only way i can think to edit rows is by using an event. there is a row*s* added event, but that gives me a list of rows that i'd have to iterate over. Thanks in advance for any help.

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• Dividing a string into list according to the format given

  - by user506710

  Hello all , I have a string like "SAB_bARGS_D" . What I want is that the string gets divided into list of characters but whenever there is a _ sign the next character gets appended to the previous one. So the answer to above should be ['S','A','B_b','A','R','G','S_D'] It can be done by using a for loop traversing through the list but is there an inbuilt function that I can use..... Thanks a lot

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• Quick way to make 26 macros (one for each letter)

  - by Geoff

  Instead of making a macro for each letter, as in \def\bA{\mathbf{A}} ... \def\bZ{\mathbf{Z}} Is there a way to loop over a character class (like capital letters) and generate macros for each? I'd also like to do the same for Greek letters (using bm instead of mathbf).

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• How to get the shortest time and longest time(or timespan) from a list using LINQ?

  - by shanthiram

  hi all, I am trying to get the longest and shortest timespan in a list using LINQ. My code looks something like this List listofTimeSpans = new List(); adding the timespans to listofTimeSpans in a foreach loop. Please help me with this. Thank you.

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• Is it possible to create a hidden property in javascript

  - by tmim

  I want to create an object with a hidden property(a property that does not show up in a for (var x in obj loop). Is it possible to do this?

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• For loops in Matlab

  - by seidel

  I run through a for loop, each time extracting certain elements of an array, say element1, element2, etc. How do I then pool all of the elements I've extracted together so that I have a list of them?

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• Does in_array() use a binary search algorithm?

  - by morpheous

  I have a largish array of string that I want to use as a lookup. I a using in_array(), but I suspect its doing a simple loop through - does anyone know whether the in_array() algo uses a bsearch algo?

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• add 2 chars without using strncopy ?

  - by every_answer_gets_a_point

  how would i manually add two chars without using the strncopy function? can i just say char1 + char2? or would i have to write a for loop to get individual elements and add them like this: addchar[0] = char1[0]; addchar[1] = char1[1]; etc etc addchar[n] = char2[0]; addchar[n+1] = char2[1]; etc etc

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• Is there a function for checking whether a matrix is diagonally dominant (row dominance)

  - by ldigas

  A matrix is diagonally dominant (by rows) if its value at the diagonal is greater then the sum of all absolute value in that row. Same goes for columns, only the other way around. Is there a function in matlab for chekcing this ? (I could write a simple loop, but I'm trying to quit those).

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• How do I access the array submit() calls in the dom?

  - by Alex

  I want to grab all the inputs inside a form, in order to submit them. The point of this is to use jquery's ajax to submit a dynamically sized form. Surely there must be an array inside the dom somewhere which i can just do something like... docment.forms['form'].elements which only lists inputs for that form, meaning I can loop through them and grab their values to play around with?

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• HTML Response compared with old html

  - by inetech

  I have a respone returned as 'response' I need to compare it with old HTML. If it is different it will just do some css. The problem is it detects a different change everytime even when there is no difference and there is a continueous loop which makes my animation on css repeat itself. Anyone help?

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