unionKeys

Obtain keys present in any ilists.

Similar: unionKeys, intersectionKeys.

function unionKeys(...xs)
// xs: all ilists

const xilists = require('extra-ilists');

var x = [['a', 'b', 'c', 'd'], [1, 2, 3, 4]];
var y = [['b', 'c', 'e'], [20, 30, 50]];
xilists.unionKeys(x, y);
// → Set(5) { 'a', 'b', 'c', 'd', 'e' }

References

• Data.Set.union: Haskell
• Set.union: Python
• _.union: lodash
• _.unionBy: lodash
• _.unionWith: lodash
• Array.union: sugarjs