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Why would I ever use push_back instead of emplace_back?
... will be invalid after the call.
std::vector<int> v;
v.emplace_back(123);
v.emplace_back(v[0]); // Produces incorrect results in some compilers
On one compiler, v contains the values 123 and 21 instead of the expected 123 and 123. This is due to the fact that the 2nd call to emplace_back re...
Submitting HTML form using Jquery AJAX
... answered May 1 '13 at 18:27
abc123abc123
15.5k66 gold badges4444 silver badges7373 bronze badges
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Meaning of epsilon argument of assertEquals for double values
...nal double DELTA = 1e-15;
@Test
public void testDelta(){
assertEquals(123.456, 123.456, DELTA);
}
If you're using hamcrest assertions, you can just use the standard equalTo() with two doubles (it doesn't use a delta). However if you want a delta, you can just use closeTo() (see javadoc), e.g....
How to get commit history for just one branch?
...ly one commit, 3 would still be listed, 2 of them from master)
See commit e3fa568 by Junio C Hamano (gitster):
revision: parse "git log -<count>" more carefully
This mistyped command line simply ignores "master" and ends up showing two commits from the current HEAD:
$ git log -2master...
How to get a one-dimensional scalar array as a doctrine dql query result?
...is so it supports indexBy gist.github.com/ostrolucky/f9f1e0b271357573fde55b7a2ba91a32
– gadelat
Apr 24 '17 at 15:04
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What is the difference between parseInt() and Number()?
...
typeof parseInt("123") => number
typeof Number("123") => number
typeof new Number("123") => object (Number primitive wrapper object)
first two will give you better performance as it returns a primitive instead of an object.
...
How to add images in select list?
...t.js; Icon/image select (combobox, dropdown)
Demo and download; http://bug7a.github.io/iconselect.js/
HTML usage;
<div id="my-icon-select"></div>
Javascript usage;
var iconSelect;
window.onload = function(){
iconSelect = new IconSelect("my-icon-select");
...
svn : how to create a branch from certain revision of trunk
... actually specify this on the command line using your example:
svn copy -r123 http://svn.example.com/repos/calc/trunk \
http://svn.example.com/repos/calc/branches/my-calc-branch
Where 123 would be the revision number in trunk you want to copy. As others have noted, you can also use the @ synt...
In C/C++ what's the simplest way to reverse the order of bits in a byte?
...xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7...
How to convert a Title to a URL slug in jQuery?
...o ensure cross-platform compatibility, you may want to subsitute from="\u00E3\u00E0\u00E1\u00E4\u00E2\u1EBD\u00E8\u00E9\u00EB\u00EA\u00EC\u00ED\u00EF\u00EE\u00F5\u00F2\u00F3\u00F6\u00F4\u00F9\u00FA\u00FC\u00FB\u00F1\u00E7\u00B7/_,:;";
– Mike Godin
Aug 7 '14 at ...