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Storing sex (gender) in database
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I'd call the column "gender".
Data Type Bytes Taken Number/Range of Values
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TinyINT 1 255 (zero to 255)
INT 4 - 2,147,483,...
Swift to Objective-C header not created in Xcode 6
...Defines Module must be set to Yes in Build Settings, under Packaging.
Finally works. Thanks to everyone for the help :-)
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How to get JQuery.trigger('click'); to initiate a mouse click
... if one of the hrefs on the <a tag is '#', that would do it. <a normally redirects to a different URL. You must stop it with ev.preventDefault() and ev.stopPropagation() before your click handler returns. OR, use some other tag besides <a; you can attach click handlers to anything that's...
Post data to JsonP
Is it possible to post data to JsonP? Or does all data have to be passed in the querystring as a GET request?
7 Answers
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How to convert wstring into string?
...e <locale>
#include <vector>
int main() {
std::setlocale(LC_ALL, "");
const std::wstring ws = L"ħëłlö";
const std::locale locale("");
typedef std::codecvt<wchar_t, char, std::mbstate_t> converter_type;
const converter_type& converter = std::use_facet<converter...
Modulo operation with negative numbers
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C99 requires that when a/b is representable:
(a/b) * b + a%b shall equal a
This makes sense, logically. Right?
Let's see what this leads to:
Example A. 5/(-3) is -1
=> (-1) * (-3) + 5%(-3) = 5
This can only happen if 5%(-3) is 2.
Example B. (-5)/3 is -1
=> (-1) * 3 + (-5...
Convert an NSURL to an NSString
...[myURL absoluteString]; But I had met this error and xcode was crashed. -[__NSCFString absoluteString]: unrecognized selector sent to instance 0x791a18e0
– Võ Mai Trinh
Jun 22 '15 at 9:39
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SQL update query using joins
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I usually start with semicolon to terminate previous statement (if any). CTE rocks ! Simple to design complicated query / joined updates. I use it all the time...
– Adam W
Dec 17 '15 at 5:19
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The performance impact of using instanceof in Java
...y heavy use of the instanceof operator. While I know that OO design generally tries to avoid using instanceof , that is a different story and this question is purely related to performance. I was wondering if there is any performance impact? Is is just as fast as == ?
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data.table vs dplyr: can one do something well the other can't or does poorly?
...j and by together is by design. By keeping related operations together, it allows to easily optimise operations for speed and more importantly memory usage, and also provide some powerful features, all while maintaining the consistency in syntax.
1. Speed
Quite a few benchmarks (though mostly on g...