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How can I add new array elements at the beginning of an array in Javascript?
... not already an array:
const array = [ 3, 2, 1 ]
const newLastElement = 0
// Both of these lines are equivalent:
const newArray1 = array.concat(newLastElement) // [ 3, 2, 1, 0 ]
const newArray2 = array.concat([newLastElement]) // [ 3, 2, 1, 0 ]
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Good way of getting the user's location in Android
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10 Answers
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How to add multi line comments in makefiles
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answered Dec 20 '10 at 20:10
Eric MelskiEric Melski
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iOS: How does one animate to new autolayout constraint (height)
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After updating your constraint:
[UIView animateWithDuration:0.5 animations:^{[self.view layoutIfNeeded];}];
Replace self.view with a reference to the containing view.
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improv...
How to filter by object property in angularJS
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edited Sep 12 '15 at 6:08
Mo.
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answered ...
PowerShell and the -contains operator
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203
The -Contains operator doesn't do substring comparisons and the match must be on a complete str...
Compress files while reading data from STDIN
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answered Nov 18 '09 at 19:27
SpaceSpace
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What does [ N … M ] mean in C aggregate initializers?
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90
It is initialization using Designated Initializers.
The range based initialization is a gnu...
What does enumerate() mean?
...gt; for count, elem in enumerate(elements):
... print count, elem
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0 foo
1 bar
2 baz
By default, enumerate() starts counting at 0 but if you give it a second integer argument, it'll start from that number instead:
>>> for count, elem in enumerate(elements, 42):
... print coun...
How to use QueryPerformanceCounter?
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#include <windows.h>
double PCFreq = 0.0;
__int64 CounterStart = 0;
void StartCounter()
{
LARGE_INTEGER li;
if(!QueryPerformanceFrequency(&li))
cout << "QueryPerformanceFrequency failed!\n";
PCFreq = double(li.QuadPart)/1000.0;
Q...