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countAs
Subhajit Sahu edited this page Dec 2, 2022
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17 revisions
Count occurrences of values.
function countAs(x, fm)
// x: a set
// fm: map function (v, v, x)const set = require('extra-set');
var x = new Set([1, 2, 3, 4, 5]);
set.countAs(x, v => v % 3);
// → Map(3) { 1 => 2, 2 => 2, 0 => 1 }
set.countAs(x, v => v % 2);
// → Map(2) { 1 => 3, 0 => 2 }