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Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop
...ays to clone an array:
loop
slice
Array.from()
concat
spread operator (FASTEST)
map A.map(function(e){return e;});
There has been a huuuge BENCHMARKS thread, providing following information:
for blink browsers slice() is the fastest method, concat() is a bit slower, and while loop is 2.4x slower....
Check if an array is empty or exists
...ength; // => "number"
Case Empty Array
Now since we tested all other possibilities, we're talking to an instance of Array. In order to make sure it's not empty, we ask about number of elements it's holding, and making sure it has more than zero elements.
firstArray = [];
firs...
How do I get a Cron like scheduler in Python? [closed]
... self.action(*self.args, **self.kwargs)
(Note: Not thoroughly tested)
Then your CronTab can be specified in normal python syntax as:
c = CronTab(
Event(perform_backup, 0, 2, dow=6 ),
Event(purge_temps, 0, range(9,18,2), dow=range(0,5))
)
This way you get the full power of Python...
How to use OR condition in a JavaScript IF statement?
...
One can use regular expressions, too:
var thingToTest = "B";
if (/A|B/.test(thingToTest)) alert("Do something!")
Here's an example of regular expressions in general:
var myString = "This is my search subject"
if (/my/.test(myString)) alert("Do something here!"...
Batch file to delete files older than N days
... Should be del @FILE, case matters Also I suggest using /c echo @FILE for testing
– Russell Steen
Sep 16 '09 at 14:55
40
...
How to pass parameters to a modal?
...ntent.html',
controller: ModalInstanceCtrl,
resolve: {
test: function () {
return 'test variable';
}
}
});
};
var ModalInstanceCtrl = function ($scope, $modalInstance, test) {
$scope.test = test;
};
See plunkr
...
Fastest way to copy file in node.js
...m (copying/reading/writing etc). I'd like to know which methods are the fastest, and I'd be happy to get an advice. Thanks.
...
HashSet versus Dictionary w.r.t searching time to find if an item exists
...
HashSet vs List vs Dictionary performance test, taken from here.
Add 1000000 objects (without checking duplicates)
Contains check for half the objects of a collection of 10000
Remove half the objects of a collection of 10000
...
In what areas might the use of F# be more appropriate than C#? [closed]
...the inputs and outputs of functions is a huge time saver, both in terms of testing and reading/understanding the code. It eradicates a whole class of errors that previous systems were prone to.
Exploratory programming Working with script files and the REPL (F# Interactive) allowed me to explore the...
How to compare if two structs, slices or maps are equal?
...
Yes exactly! When writing tests, it's very important to use go-cmp and not reflect.
– Kevin Minehart
Sep 19 '17 at 1:01
...