Write order?
setTimeout(function(){
console.log('1');
},3000);
setTimeout(function(){
console.log('2');
},0);
console.log('3');
var p = new Promise(function(resolve,reject){
setTimeout(function(){
resolve('Hello 1');
},3000);
});
p.then(function(msg){
console.log(msg);
});
console.log('Hello 2');
var p1 = new Promise(function(resolve,reject){
setTimeout(function(){
resolve('Hello 1');
},3000);
});
var p2 = new Promise(function(resolve,reject){
setTimeout(function(){
resolve('Hello 2');
},1000);
});
p1.then(function(msg){
console.log(msg);
return 'P1 done!';
})
.then(function(msg){
p2.then(function(msg){
console.log(msg);
});
console.log(msg);
});
console.log('Hello 3');
function timeout(milliSeconds){
console.log('In timeout');
return new Promise(function(resolve){
setTimeout(resolve,milliSeconds)
});
}
async function run(x) {
await timeout(3000);
return 'Timeout Finished!';
}
run(10).then(function(msg){
console.log(msg)
});
console.log('Last Line');
function resolveAfter3Secs(x) {
return new Promise(resolve => {
setTimeout(() => {
console.log('01 - ' + new Date());
resolve(x+10);
}, 3000);
});
}
async function run(x) {
var response = await resolveAfter3Secs(x);
console.log('02 - ' + new Date());
return response;
}
run(10).then(response => {
console.log(response);
console.log('03 - ' + new Date());
});
console.log('04 - ' + new Date());
var request = require('request');
var url = 'http://student.mit.edu/catalog/m1a.html';
function makeRequest(url) {
// return promise
return new Promise(function(resolve,reject) {
function callback(error, response, body) {
resolve(body);
}
request(url, callback);
});
}
var run = async () => {
console.log('make: ' + await makeRequest(url))
return "done"
}
run().then((result) =>{
console.log(result);
});
var fetch = require('node-fetch');
var makeRequest = async function (url) {
var response = await fetch(url);
var text = await response.text();
return text;
};
var url = 'http://student.mit.edu/catalog/m1a.html';
makeRequest(url).then((text) =>{
console.log(text);
});
var fetch = require('node-fetch');
var fs = require('fs');
var urls = ['http://student.mit.edu/catalog/m1a.html'];
const writeFile = (path, data, opts = 'utf8') =>
new Promise((resolve, reject) => {
fs.writeFile(path, data, opts, (err) => {
if (err) reject(err)
else resolve()
})
})
var makeRequest = async function (url,counter) {
var response = await fetch(url);
await writeFile('data/' + counter + '.html', await response.text());
return 'done - ' + counter;
};
urls.forEach(function(url,i){
makeRequest(url,i).then((result) =>{
console.log(result);
});
})