hasSubset

Check if ientries has a subset.

Alternatives: has, hasValue, hasEntry, hasSubset, hasPath.
Similar: randomSubset, subsets, hasSubset.

function hasSubset(x, y, fc, fm)
// x:  ientries
// y:  search subset
// fc: compare function (a, b)
// fm: map function (v, k, x)

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

var x = [["a", 1], ["b", 2], ["c", 3], ["d", 4]];
var y = [["b", 2], ["d", 4]];
ientries.hasSubset(x, y);
// → true

var y = [["b", -2], ["d", -4]];
ientries.hasSubset(x, y);
// → false

ientries.hasSubset(x, y, (a, b) => Math.abs(a) - Math.abs(b));
// → true

ientries.hasSubset(x, y, null, v => Math.abs(v));
// → true

References

• Data.List.isSubsequenceOf: Haskell
• List-Extra.isSubsequenceOf: elm