chore: import upstream snapshot with attribution

curriculum/challenges/english/blocks/basic-javascript/56bbb991ad1ed5201cd392cd.md

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+---
+id: 56bbb991ad1ed5201cd392cd
+title: Manipulate Arrays With shift Method
+challengeType: 1
+forumTopicId: 18238
+dashedName: manipulate-arrays-with-shift
+---
+
+# --description--
+
+`pop()` always removes the last element of an array. What if you want to remove the first?
+
+That's where `.shift()` comes in. It works just like `.pop()`, except it removes the first element instead of the last.
+
+Example:
+
+```js
+const ourArray = ["Stimpson", "J", ["cat"]];
+const removedFromOurArray = ourArray.shift();
+```
+
+`removedFromOurArray` would have a value of the string `Stimpson`, and `ourArray` would have `["J", ["cat"]]`.
+
+# --instructions--
+
+Use the `.shift()` function to remove the first item from `myArray` and assign the "shifted off" value to a new variable, `removedFromMyArray`.
+
+# --hints--
+
+`myArray` should now equal `[["dog", 3]]`.
+
+```js
+assert(
+  (function (d) {
+    if (d[0][0] == 'dog' && d[0][1] === 3 && d[1] == undefined) {
+      return true;
+    } else {
+      return false;
+    }
+  })(myArray)
+);
+```
+
+`removedFromMyArray` should contain `["John", 23]`.
+
+```js
+assert(
+  (function (d) {
+    if (
+      d[0] == 'John' &&
+      d[1] === 23 &&
+      typeof removedFromMyArray === 'object'
+    ) {
+      return true;
+    } else {
+      return false;
+    }
+  })(removedFromMyArray)
+);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+// Setup
+const myArray = [["John", 23], ["dog", 3]];
+
+// Only change code below this line
+
+```
+
+# --solutions--
+
+```js
+const myArray = [["John", 23], ["dog", 3]];
+
+// Only change code below this line
+const removedFromMyArray = myArray.shift();
+```