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countAs
Subhajit Sahu edited this page Dec 8, 2022
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13 revisions
Count occurrences of values.
function countAs(x, fm)
// x: an object
// fm: map function (v, k, x)const object = require('extra-object');
var x = {a: 1, b: 1, c: 2, d: 2, e: 4};
object.countAs(x);
// → Map(3) { 1 => 2, 2 => 2, 4 => 1 }
var x = {a: 1, b: 2, c: 3, d: 4};
object.countAs(x, v => v % 2);
// → Map(2) { 1 => 2, 0 => 2 }