2018 TypeScript Update(4)LDAPJS and RESTful and Async

2018 TypeScript Update(4)LDAPJS and RESTful and Async

LDAP Guide
http://ldapjs.org/guide.html
LDAP - Lightweight Directory Access Protocol

Understand a Simple RESTful TypeScript
https://github.com/vrudikov/typescript-rest-boilerplate

> git clone https://github.com/vrudikov/typescript-rest-boilerplate

Go to that project, install the dependency
> npm install

Generate the swagger document
> npm run swagger

Start the Project
> npm start

Visit the URL
http://localhost:3000/

Some Tests Fail, Not Latest
Check this project
https://github.com/w3tecch/express-typescript-boilerplate

This Project seems great.

Understand Async in TypeScript
http://www.webhek.com/post/javascript-async-await-2.html

async means this function is async, await can only be inside this function.
await means wait for promise return value
await will follow by promise

Example
Begin with a simple example
var sleep = function(time) {
    Return new Promise(function(resolve, reject){
        setTimeout(function() { resolve();}, time);
    })
}

var start = async function() {
    console.log(’start’);
    await sleep(3000);
    console.log(‘end’);
}

Start();

Get Return Value
var sleep = function(time){
    return new Promise(function(resolve, reject) {
        setTimeout(function(){  resolve(‘ok’); }, time);
    })
}

var start = async function() {
    let result = await sleep(3000);
    console.log(result);
};

Get the Error
var sleep = function (time) {
    return new Promise(function(resolve, reject) {
        setTimeout(function() { reject(‘error’); }, time);
    })
};
var start = async function(){
    try{
        console.log(‘start’);
        await sleep(3000); //error
        console.log(‘end’);
    }catch(err){
        console.log(err);
    }
};




References:
http://ldapjs.org/
http://ldapjs.org/guide.html

https://github.com/vrudikov/typescript-rest-boilerplate