take$ - nodef/extra-map GitHub Wiki
Keep first n entries only (default order).
function take$(x, n)
// x: a map (updated)
// n: number of entries [1]
const map = require('extra-map');
var x = new Map(['a', 1], ['b', 2], ['c', 3], ['d', 4](/nodef/extra-map/wiki/'a',-1],-['b',-2],-['c',-3],-['d',-4));
map.take$(x, 2);
// → Map(2) { 'a' => 1, 'b' => 2 }
x;
// → Map(2) { 'a' => 1, 'b' => 2 }
var x = new Map(['a', 1], ['b', 2], ['c', 3], ['d', 4](/nodef/extra-map/wiki/'a',-1],-['b',-2],-['c',-3],-['d',-4));
map.take$(x, 3);
// → Map(3) { 'a' => 1, 'b' => 2, 'c' => 3 }