feat: 移动数组元素

Author: coderwei99

面试常见的手写题/18-array_move.js

@@ -0,0 +1,22 @@
+let arr = [1, 2, 3, 4, 5]
+
+function moveArray(arr, startIndex, endIndex) {
+  let newArr = [...arr]
+  switchItem(startIndex, newArr, endIndex)
+
+  return newArr
+}
+
+function switchItem(startIndex, newArr, endIndex) {
+  let _start = startIndex > 0 ? startIndex : newArr.length + startIndex
+  if (_start >= 0 && _start < newArr.length) {
+    let _end = endIndex > 0 ? endIndex : newArr.length + endIndex
+
+    const [item] = newArr.splice(startIndex, 1)
+    newArr.splice(_end, 0, item)
+  }
+}
+
+console.log(moveArray(arr, 2, 3)) //[1,2,4,3,5]
+
+// console.log(moveArray(arr, -1, -2)) //[1,2,3,5,4]