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How to force garbage collector to run?
...s call to Collect). If you want a chance for those objects to be collected then you need another call to Collect after calling WaitForPendingFinalizers.
– LukeH
Nov 23 '10 at 15:28
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How can I import a database with MySQL from terminal?
.... Executing SQL Statements from a Text File
Note: If you are on windows then you will have to cd (change directory) to your MySQL/bin directory inside the CMD before executing the command.
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Twitter image encoding challenge [closed]
... solution -- kind of a large number with a radix that varies by position.
Then it converts that into a base of whatever the size of the character set available is. By default, it makes full use of the assigned unicode character set, minus the less than, greater than, ampersand, control, combining,...
How to checkout a specific Subversion revision from the command line?
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If you already have it checked out locally then you can cd to where it is checked out, then use this syntax:
$ svn up -rXXXX
ref: Checkout a specific revision from subversion from command line
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Simple and fast method to compare images for similarity
... have precise alignment of your template (the icon) to the testing region, then any old sum of pixel differences will work.
If the alignment is only going to be a tiny bit off, then you can low-pass both images with cv::GaussianBlur before finding the sum of pixel differences.
If the quality of t...
Xcode 4: How do you view the console?
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You need to click Log Navigator icon (far right in left sidebar). Then choose your Debug/Run session in left sidebar, and you will have console in editor area.
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How do I iterate through each element in an n-dimensional matrix in MATLAB?
...AB uses a 32 bit integer to store these indexes. So if your array has more then a total of 2^32 elements in it, the linear index will fail. It is really only an issue if you use sparse matrices often, when occasionally this will cause a problem. (Though I don't use a 64 bit MATLAB release, I believe...
When should we use mutex and when should we use semaphore
... the count of keys - is set to 4 at beginning (all four toilets are free), then the count value is decremented as people are coming in. If all toilets are full, ie. there are no free keys left, the semaphore count is 0. Now, when eq. one person leaves the toilet, semaphore is increased to 1 (one fre...
What is the purpose of Android's tag in XML layouts?
... True, a simple TextView could be used instead in layout2, however that then would be a completely different thing and not useful as an example in the answer to this question.
– Dave
Oct 3 '13 at 14:55
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What is the difference between `after_create` and `after_save` and when to use which?
...s later
So if you want to do this email operation only just the once (and then never again) then use after_create.
If you want to do it every time the object is saved, then do it in after_save
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