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How to explain callbacks in plain english? How are they different from calling one function from ano
... as a variable where we store information about function.
function processArray(arr, callback) {
var resultArr = new Array();
for (var i = arr.length-1; i >= 0; i--)
resultArr[i] = callback(arr[i]);
return resultArr;
}
var arr = [1, 2, 3, 4];
var arrReturned = processArray(...
lodash multi-column sortBy descending
There's a nifty method to sort an array of objects based on several properties:
7 Answers
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How to read json file into java with simple JSON library
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The whole file is an array and there are objects and other arrays (e.g. cars) in the whole array of the file.
As you say, the outermost layer of your JSON blob is an array. Therefore, your parser will return a JSONArray. You can then get JSON...
How do I get the opposite (negation) of a Boolean in Python?
...1 and 0.
So these cannot be used to "negate" a bool.
Negation with NumPy arrays (and subclasses)
If you're dealing with NumPy arrays (or subclasses like pandas.Series or pandas.DataFrame) containing booleans you can actually use the bitwise inverse operator (~) to negate all booleans in an array:...
How do I select a random value from an enumeration?
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Array values = Enum.GetValues(typeof(Bar));
Random random = new Random();
Bar randomBar = (Bar)values.GetValue(random.Next(values.Length));
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What are the lesser known but useful data structures?
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Bloom filter: Bit array of m bits, initially all set to 0.
To add an item you run it through k hash functions that will give you k indices in the array which you then set to 1.
To check if an item is in the set, compute the k indices and c...
Controlling fps with requestAnimationFrame?
...variable in the object each setInterval 'frame'. Keep these objects in an array. Set your interval to your desired fps in ms: ms=(1000/fps). This keeps a steady clock that allows the same fps on any device, regardless of RAF speed. Do not assign the transforms to the elements here!
In a reques...
Set Locale programmatically
... set.add(all.get(i)); } Locale[] locales = set.toArray(new Locale[0]); configuration.setLocales(new LocaleList(locales)); inside @TargetApi(Build.VERSION_CODES.N) updateResourcesLocale()
– Vojtech Pohl
Jan 29 at 22:35
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PHP foreach loop key value
I am running this DB call to get me multi-dimensional array
I am trying to get the keys of each but when I try it comes up blank or as array.
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Last segment of URL in jquery
...ing(this.href.lastIndexOf('/') + 1));
That way, you'll avoid creating an array containing all your URL segments, as split() does.
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