@extra-map/range-on v2.0.73

Finds smallest and largest entries. :running: :package:

This is part of package extra-map.

map.rangeOn(x, [fn], [ths]);
// x:   a map
// fn:  map function (v, k, x)
// ths: this argument
// --> [min, max]

const map = require('extra-map');

var x = new Map([['A', 1], ['B', 2], ['C', -3]]);
map.rangeOn(x);
// [ [ 'C', -3 ], [ 'B', 2 ] ]

map.rangeOn(x, v => Math.abs(v));
// [ [ 'A', 1 ], [ 'C', -3 ] ]