hasPath - nodef/extra-map GitHub Wiki

Check if nested map has a path.

Alternatives: has, hasValue, hasEntry, hasSubset, hasPath. Similar: hasPath, getPath, setPath$, removePath$.

function hasPath(x, p)
// x: a nested map
// p: path

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

var x = new Map(['a', 2], ['b', 4],  ['c', 6](/nodef/extra-map/wiki/'a',-2],-['b',-4],--['c',-6));
var y = new Map(['x', x], ['e', 10], ['f', 12](/nodef/extra-map/wiki/'x',-x],-['e',-10],-['f',-12));
map.hasPath(y, ['e']);
// → true

map.hasPath(y, ['x', 'b']);
// → true

map.hasPath(y, ['x', 'b', 'c']);
// → false

References