lastIndexOf string method in javascript.How to get all checked checkbox value in javascript.Check if checkbox is checked in Javascript.JavaScript function return multiple values.Multiple Case In Switch Statement JavaScript.Find index of object in array JavaScript.Difference between let and const in javascript.Difference between = and = in javascript.Javascript loop through array of objects.Print array using for loop in javascript.JavaScript remove duplicates from array.To compare numbers instead of strings, the compare function can subtract bįrom a. The default lexicographic comparator satisfies all constraints above. A comparator that always returns 0 will cause the array to not be changed at all, but is reliable nonetheless. For example, if a comparator only returns 1 and 0, or only returns 0 and -1, it will not be able to sort reliably because anti-symmetry is broken. Transitive: If compareFn(a, b) and compareFn(b, c) are both positive, zero, or negative, then compareFn(a, c) has the same positivity as the previous two.Ī comparator conforming to the constraints above will always be able to return all of 1, 0, and -1, or consistently return 0.Anti-symmetric: compareFn(a, b) and compareFn(b, a) must both be 0 or have opposite signs.

Stable: The comparator returns the same result with the same pair of input.

(This is important because there's no guarantee when and how the comparator will be called, so any particular call should not produce visible effects to the outside.)

Pure: The comparator does not mutate the objects being compared or any external state.

More formally, the comparator is expected to have the following properties, in order to ensure proper sort behavior:

Object.prototype._lookupSetter_() Deprecated.

Object.prototype._lookupGetter_() Deprecated.

Object.prototype._defineSetter_() Deprecated.

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