currying in javascript
//No currying
function volume(w, h, l) {
return w * h * l;
}
volume(4, 6, 3); // 72
//Currying
function volume(w) {
return function(h) {
return function(l) {
return w * h* l;
}
}
}
volume(4)(6)(3); // 72currying in javascript
//No currying
function volume(w, h, l) {
return w * h * l;
}
volume(4, 6, 3); // 72
//Currying
function volume(w) {
return function(h) {
return function(l) {
return w * h* l;
}
}
}
volume(4)(6)(3); // 72javascript this in settimeout
function func() {
this.var = 5;
this.changeVar = function() {
setTimeout(() => { //Don't use function, use arrow function so 'this' refers to 'func' and not window
this.var = 10;
}, 1000);
}
}
var a = new func();
a.changeVar();asynchronous javascript
console.log ('Starting');
let image;
fetch('coffee.jpg').then((response) => {
console.log('It worked :)')
return response.blob();
}).then((myBlob) => {
let objectURL = URL.createObjectURL(myBlob);
image = document.createElement('img');
image.src = objectURL;
document.body.appendChild(image);
}).catch((error) => {
console.log('There has been a problem with your fetch operation: ' + error.message);
});
console.log ('All done!');Asynchronous in javascript
//Asynchronous JavaScript
console.log('I am first');
setTimeout(() => {
console.log('I am second')
}, 2000)
setTimeout(() => {
console.log('I am third')
}, 1000)
console.log('I am fourth')
//Expected output:
// I am first
// I am fourth
// I am third
// I am secondAsynchronous in javascript
//Asynchronous JavaScript
console.log('I am first');
setTimeout(() => {
console.log('I am second')
}, 2000)
setTimeout(() => {
console.log('I am third')
}, 1000)
console.log('I am fourth')
//Expected output:
// I am first
// I am fourth
// I am third
// I am secondHow does asynchronous javascript work?
const printProcess = () => {
console.log('it will print 2nd');
var currentTime = new Date().getTime();
while (currentTime + 3000 >= new Date().getTime());
console.log('it will print after added 3 second with current time')
}
console.log('it will print 1st ');
printProcess(); //follow arrow funtion after 1st print
console.log('it will print at the end');
//Expected output below:
// it will print 1st
// it will print 2nd
// it will print after added 3 second with current time
// it will print at the endCopyright © 2021 Codeinu
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