unionKeys

Gives keys present in any entries. 🏃 📼 📦 🌔 📒

Similar: unionKeys, intersectionKeys.

entries.unionKeys(...xs);
// xs: n entries

const entries = require("extra-entries");

var x = [["a", 1], ["b", 2], ["c", 3], ["d", 4]];
var y = [["b", 20], ["c", 30], ["e", 50]];
entries.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