ui

app/code/node_modules/collect.js/dist/methods/shift.js

@@ -0,0 +1,50 @@
+'use strict';
+
+var _require = require('../helpers/is'),
+    isArray = _require.isArray,
+    isObject = _require.isObject;
+
+var deleteKeys = require('../helpers/deleteKeys');
+
+module.exports = function shift() {
+  var _this = this;
+
+  var count = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 1;
+
+  if (this.isEmpty()) {
+    return null;
+  }
+
+  if (isArray(this.items)) {
+    if (count === 1) {
+      return this.items.shift();
+    }
+
+    return new this.constructor(this.items.splice(0, count));
+  }
+
+  if (isObject(this.items)) {
+    if (count === 1) {
+      var key = Object.keys(this.items)[0];
+      var value = this.items[key];
+      delete this.items[key];
+
+      return value;
+    }
+
+    var keys = Object.keys(this.items);
+    var poppedKeys = keys.slice(0, count);
+
+    var newObject = poppedKeys.reduce(function (acc, current) {
+      acc[current] = _this.items[current];
+
+      return acc;
+    }, {});
+
+    deleteKeys(this.items, poppedKeys);
+
+    return new this.constructor(newObject);
+  }
+
+  return null;
+};