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How do MySQL indexes work?
I am really interested in how MySQL indexes work, more specifically, how can they return the data requested without scanning the entire table?
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Remove empty elements from an array in Javascript
...nts in the original array.
The MDN page linked above also contains a nice error-checking version of filter that can be used in JavaScript interpreters that don't support the official version.
Note that this will not remove null entries nor entries with an explicit undefined value, but the OP speci...
Are memory leaks ever ok? [closed]
...forced this situation on me, it would lead me to seriously suspect the overall quality of the library in question. It would be as if I test drove a car and found a couple loose washers and nuts in one of the cupholders – it may not be a big deal in itself, but it portrays a lack of commitment to ...
How to create a directory using nerdtree
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when type a I get an error Error detected while processing function <SNR>_15_showMenu..... . Culprit could be some other plugin. I will debug it later. thanks.
– Nick Vanderbilt
May 23 '10 at 0:02
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How to detect Safari, Chrome, IE, Firefox and Opera browser?
...it's truly necessary, such as showing browser-specific instructions to install an extension. Use feature detection when possible.
Demo: https://jsfiddle.net/6spj1059/
// Opera 8.0+
var isOpera = (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >...
Using R to download zipped data file, extract, and import data
... when I tried your solution for multiple files, I'm getting an error that File is empty:
– bshelt141
Aug 16 '17 at 15:06
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Escape Character in SQL Server
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@MichaelMunsey try it for yourself: select ' returns the error Unclosed quotation mark after the character string ''. Nowhere in my answer do I use " only two ', not sure why mine is the only answer with down votes.
– Seph
Aug 19 '15 at 12:23
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Hash and salt passwords in C#
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Actually this is kind of strange, with the string conversions - which the membership provider does to put them into config files. Hashes and salts are binary blobs, you don't need to convert them to strings unless you want to put...
How to split one string into multiple variables in bash shell? [duplicate]
I've been looking for a solution and found similar questions, only they were attempting to split sentences with spaces between them, and the answers do not work for my situation.
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nginx upload client_max_body_size issue
...h seemed to be the better one and I tried it. But I'm still getting a 413 error after about 20 seconds for a 4mb file. My upspeeds cannot manage 4 MB in 20secs so it is happening after data has been flowing for quite a bit. Thoughts?
– Jerome
Oct 19 '14 at 1...