Update P1-Reverse each string.md

Promise/P1-Reverse each string.md

@@ -1,92 +1,17 @@
-<h1>This doc shows how to input output for javascript in Node environment</h1>
-
-Case #1. Single line input
- ```js
- const readline = require('readline');
-
-const rl = readline.createInterface({
-    input: process.stdin,
-    output: process.stdout
-});
-rl.on('line', function (line) {
-    console.log(line)
-});
- ```
-
-Case #2: Multiple lines input,  number of line is certain:
-```js
-const readline = require('readline');
-
-const rl = readline.createInterface({
-    input: process.stdin,
-    output: process.stdout
-});
-// number of lines to be input:
-let num = 2;
-let inputs =[]; // Array to store all the lines 
-rl.on('line', function (line) {
-    inputs.push(line);
-    if(inputs.length === num){
-        // all lines are input done, start processing them
-        console.log(inputs[0].substr(0,parseInt(inputs[1])))；
-        // Clean the array so that it can store next group lines
-        inputs = [];
-    }
-});
-```
-
-case #3:  Multiple lines input,  first line is the line number, subsequent lines are real data:
-```js
-const readline = require('readline');
-
-const rl = readline.createInterface({
-    input: process.stdin,
-    output: process.stdout
-});
-let num = 0;
-let inputs = [];
-rl.on('line', function (line) {
-    if(num === 0){
-        num = parseInt(line)
-    }else{
-        inputs.push(line.toLocaleLowerCase());
-    }
-    if(inputs.length === num){
-        for(let item of inputs){
-           //...
-           //Process all the lines in input array
-            // clean for next group
-            num = 0;
-            inputs = [];
-        }
-    }
-});
-```
-Case #4,  multiple lines input,  line number is uncertain:
-```js
-const readline = require('readline');
-
-const rl = readline.createInterface({
-    input: process.stdin,
-    output: process.stdout
-});
-
-let inputs = [];
-
-rl.on('line', function (line) {
-        inputs.push(line);
-    }
-);
-// 输入结束时，在 close 中对数据进行处理
-rl.on('close', function () {
-
+<h1>How to reverse a long sentence and then each world</h1>
+
+```ts
+function reverseChunks(input: string): Promise<string>[] {
+    let arrs = input.split('').reverse().join('').split(' ');
+    return arrs.map(chunk => new Promise<string>((resolve) => {
+        resolve(chunk.split('').reverse().join(''));
+    }));
+}
+
+let input : string = 'this is a long string that will be split into chunks and each chunk will be reversed';
+const promises = reverseChunks(input);
+Promise.all(promises).then(results => {
+    let ret: string = results.join(' ');
+    console.log(ret);
 });
 ```
-
-
-
-
-
-
-
-