Just some nitpicking from an API point of view:
`Array.prototype.sort(compareFn, isStable = false)`
should probably be something like:
`Array.prototype.sort(compareFn, options = {})`
(Because who knows what extensions will be proposed in the future.)
Am 10.03.2016 um 18:59 schrieb 森建:
EcmaScript hasn't have the stable sort method yet.
http://www.ecma-international.org/ecma-262/6.0/#sec-array.prototype.sort
Sure, we can create stable sort function by using `Array#sort`,
by returning the number of index (e.g. `arr.indexOf(arguments[0]) -
arr.indexOf(arguments[1])`)
when it is equal to both arguments value in `comparefn`.
But this is inefficient and perplexing.
So, I propose below.
`Array#stableSort(comparefn)`
or
`Array#sort(comparefn, isStable = false)`
Thanks!
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