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Is it a good idea to index datetime field in mysql?
...it in conditions frequently in queries. If your only condition is BETWEEN NOW() AND DATE_ADD(NOW(), INTERVAL 30 DAY) and you have no other index in the condition, MySQL will have to do a full table scan on every query. I'm not sure how many rows are generated in 30 days, but as long as it's less t...
Function that creates a timestamp in c#
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//Find unix timestamp (seconds since 01/01/1970)
long ticks = DateTime.UtcNow.Ticks - DateTime.Parse("01/01/1970 00:00:00").Ticks;
ticks /= 10000000; //Convert windows ticks to seconds
timestamp = ticks.ToString();
Adjusting the denominator allows you to choose your level of precision
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Error 'LINK : fatal error LNK1123: failure during conversion to COFF: file invalid or corrupt' after
...stalled Visual Studio 2012 Release Preview, and it appears to be fine, but now when I try to use Visual Studio 2010 to compile C++ projects, I get the following error message:
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How to move out of auto-completed brackets in IntelliJ IDEA (without using the arrow keys)?
...n MS Visual Studio - without visual indication of tab 'exit' position. For now, it should work in Java, SQL, Python and some other files. It will take some time for other languages to catch up - some language-specific code changes are required.
The feature is disabled by default, you can enable it ...
How can I close a buffer without closing the window?
...isplay (:sp) and then select a different buffer to display in each window. Now I want to close one of the buffers, yet I don't want the window to close (After the closing it can display the next buffer on the list or an empty buffer, it doesn't matter). How can I do this?
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Unit testing of private methods [duplicate]
... declare your test fixture as a friend to the class under test.
And you know, if testing private functions were unequivocally bad like some of the other answers were saying, then it probably wouldn't be built into Google Test.
You can read more about when testing private functions is good or bad...
Installing Ruby Gem in Windows
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I downloaded this and now I am stuck with a file that crashes my pc when i try to run, move or delete it, even after rebooting. Never had this before.
– Daan Luttik
May 30 '15 at 12:45
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Determine what attributes were changed in Rails after_save callback?
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I think after_update is deprecated now? Anyway, I tried this in an after_save hook and that seemed to work fine. (The changes() hash still hasn't been reset yet in an after_save, apparently.)
– Tyler Rick
Mar 14 '13 at 5:...
Convert Data URI to File then append to FormData
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BlobBuilder and ArrayBuffer are now deprecated, here is the top comment's code updated with Blob constructor:
function dataURItoBlob(dataURI) {
var binary = atob(dataURI.split(',')[1]);
var array = [];
for(var i = 0; i < binary.length; i++) ...
SQL multiple column ordering
...en performs STABLE sorting by column1. This is more clear for people that knows what stable sorting is.
– Atom
Oct 3 '16 at 13:49
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