pqsort

Partial quicksort.

install ##

``bash
npm install pqsort --save-prod
`

Usage ##

`js
const pqsort = require('pqsort')

var t1 = transform([5, 7, 4, 2, 8, 6, 1, 9, 0, 3])
var t2 = transform([5, 7, 4, 2, 8, 6, 1, 9, 0, 3])

/** Here we construct an object {value: value, data: index} to keep the sorted index under the data attribute.
You may put anything under the data attribute.
The sorting will be performed on the value attribute. **/
function transform (arr) {
return arr.map(function (v, index) { return {value: v, data: index} })
}

// sort the 3 minimum values in the array and put them at the beginning
pqsort(t1, 3)
/* t1 = [ { data: 8, value: 0 },
{ data: 6, value: 1 },
{ data: 3, value: 2 }, ...] */

// sort 10 values in the array (all of them)
pqsort(t2)
/* t2 = [{ data: 8, value: 0 },
{ data: 6, value: 1 },
{ data: 3, value: 2 },
{ data: 9, value: 3 },
{ data: 2, value: 4 },
{ data: 0, value: 5 },
{ data: 5, value: 6 },
{ data: 1, value: 7 },
{ data: 4, value: 8 },
{ data: 7, value: 9 }] */
``

TODO ##

* self-defined comparision function