Initial commit

.babelrc

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+{
+ "presets": [
+ "@babel/preset-env"
+ ]
+}

.gitignore

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+node_modules
+package-lock.json
+.log/

README.md

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+# The minimal backend Node.js setup
+
+with [Nodemon](https://www.npmjs.com/package/nodemon) and [Babel](https://babeljs.io/).
+
+## Install
+
+```
+npm install
+```
+
+### Run
+
+```
+npm start
+```

package.json

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+{
+ "name": "01_bigo",
+ "version": "1.0.0",
+ "description": "",
+ "main": "index.js",
+ "scripts": {
+ "start": "nodemon src/index.js",
+ "start-babel": "nodemon --exec babel-node src/index.js",
+ "test": "echo \"Error: no test specified\" && exit 1"
+ },
+ "keywords": [],
+ "author": "",
+ "license": "ISC",
+ "devDependencies": {
+ "@babel/core": "^7.12.10",
+ "@babel/node": "^7.12.10",
+ "@babel/preset-env": "^7.12.11",
+ "nodemon": "^2.0.7"
+ }
+}

src/array.js

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+class MyArray {
+ constructor() {
+ this.length = 0;
+ this.data = {};
+ }
+
+ get(index) {
+ return this.data[index];
+ }
+
+ push(item) {
+ this.data[this.length] = item;
+ this.length++;
+ return this.length;
+ }
+
+ pop() {
+ const lastItem = this.data[this.length-1];
+ delete this.data[this.length-1];
+ this.length--;
+ return lastItem;
+ }
+
+ delete(index) {
+ const item = this.data[index];
+ this.shiftItems(index);
+ this.length--;
+ return item;
+ }
+
+ shiftItems(index) {
+ for (let i = index; i < this.length-1; i++) {
+ this.data[i] = this.data[i+1];
+ }
+ delete this.data[this.length-1];
+ }
+}
+
+module.exports = {
+ MyArray: MyArray
+}

src/index.js

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+// import { MyArray } from './array';
+
+// const newArray = new MyArray();
+// newArray.push('hi');
+// newArray.push('you');
+// newArray.push('!');
+// console.log(newArray);
+// newArray.delete(0);
+// newArray.push('are');
+// newArray.push('nice');
+// newArray.delete(1);
+// console.log(newArray);
+
+
+// function reverse(str) {
+// let arr = str.split("");
+// let i = 0;
+// let j = arr.length-1;
+// while(i < j) {
+// let tmp = arr[i];
+// arr[i] = arr[j];
+// arr[j] = tmp;
+// i++;
+// j--;
+// }
+// return arr.join("");
+// }
+
+// let str = "Hello World!";
+// let str = "Hello Worldz!";
+let str = "zappa";
+// let revStr = reverse(str);
+// console.log( revStr );
+
+// const reverse3 = str => str.split('').reverse().join('');
+const reverse3 = str => [...str].reverse().join('');
+console.log( reverse3(str) );
+