Dec 5, 2019 · Nov 19, 2019 · Nov 20, 2019 · Nov 20, 2019 · Nov 20, 2019 · Nov 20, 2019
diff --git a/4-binary/01-arraybuffer-binary-arrays/01-concat/_js.view/solution.js b/4-binary/01-arraybuffer-binary-arrays/01-concat/_js.view/solution.js
 function concat(arrays) {
  //sum of individual array lengths
  //对每个数组长度求和
  let totalLength = arrays.reduce((acc, value) => acc + value.length, 0);

  if (!arrays.length) return null;

  let result = new Uint8Array(totalLength);

  //for each array - copy it over result
  //next array is copied right after the previous one
  //对于每个数组 — 复制到 result
  //下一个数组在前一个后面复制
  let length = 0;
  for(let array of arrays) {
    result.set(array, length);
diff --git a/4-binary/01-arraybuffer-binary-arrays/01-concat/_js.view/source.js b/4-binary/01-arraybuffer-binary-arrays/01-concat/_js.view/source.js
 function concat(arrays) {
  //...your code...
  //……你的代码……
 }

 let chunks = [
diff --git a/4-binary/01-arraybuffer-binary-arrays/01-concat/task.md b/4-binary/01-arraybuffer-binary-arrays/01-concat/task.md

 # Concatenate typed arrays
 #拼接类型化数组（Concatenate typed arrays）

 Given an array of`Uint8Array`, write a function`concat(arrays)` that returns a concatenation of them into a single array.
 给定一个`Uint8Array` 数组，请写一个函数`concat(arrays)`，将数组拼接成一个单一数组并返回。
Original file line number	Diff line number	Diff line change
		@@ -1,13 +1,13 @@
		function concat(arrays) {
		//sum of individual array lengths
		//对每个数组长度求和
		let totalLength = arrays.reduce((acc, value) => acc + value.length, 0);

		if (!arrays.length) return null;

		let result = new Uint8Array(totalLength);

		//for each array - copy it over result
		//next array is copied right after the previous one
		//对于每个数组 — 复制到 result
		//下一个数组在前一个后面复制
		let length = 0;
		for(let array of arrays) {
		result.set(array, length);
Expand Down
Original file line number	Diff line number	Diff line change
		@@ -1,4 +1,4 @@

		# Concatenate typed arrays
		#拼接类型化数组（Concatenate typed arrays）

		Given an array of`Uint8Array`, write a function`concat(arrays)` that returns a concatenation of them into a single array.
		给定一个`Uint8Array` 数组，请写一个函数`concat(arrays)`，将数组拼接成一个单一数组并返回。