Create 1640-check-array-formation-through-concatenation.js

Author: everthis

1640-check-array-formation-through-concatenation.js

@@ -0,0 +1,13 @@
+/**
+ * @param {number[]} arr
+ * @param {number[][]} pieces
+ * @return {boolean}
+ */
+const canFormArray = function(arr, pieces) {
+  const str = arr.join('-')
+  for(let i = 0, len = pieces.length; i < len; i++) {
+    const tmp = pieces[i].join('-')
+    if(str.indexOf(tmp) === -1) return false
+  }
+  return true
+};