feat: array.isEmpty method

array/#/index.js

@@ -26,6 +26,7 @@ module.exports = {
 	"indexesOf": require("./indexes-of"),
 	"intersection": require("./intersection"),
 	"isCopy": require("./is-copy"),
+	"isEmpty": require("./is-empty"),
 	"isUniq": require("./is-uniq"),
 	"last": require("./last"),
 	"lastIndex": require("./last-index"),

array/#/is-empty.js

@@ -0,0 +1,8 @@
+"use strict";
+
+var ensureArray = require("../../object/ensure-array")
+  , firstIndex  = require("./first-index");
+
+module.exports = function () {
+	return firstIndex.call(ensureArray(this)) === null;
+};

test/array/#/is-empty.js

@@ -0,0 +1,8 @@
+"use strict";
+
+module.exports = function (t, a) {
+	var x = {};
+	a(t.call([]), true, "Empty");
+	a(t.call({ length: 0 }), true, "Empty lists");
+	a(t.call([1, x, "raz"]), false, "Non empty");
+};