What data types in JS do you know? What data types are mutable? How to solve mutability problem in the code?
var person1 = {name: 'Ana'};
var person2 = person1;
person1.name = 'Julia';
console.log(person1.name);
console.log(person2.name);What is the Prototype? What is the own object properties?
var Person = function(firstname, lastname) {
this.firstname = firstname;
this.lastname = lastname;
var age = "20";
};
var john = new Person("John", "Doe", 35);
for (var prop in john) {
console.log(prop);
}JS is the single threaded language. What is means? How do you understand call stack? What is the event loop?
console.log('1');
setTimeout(function() {console.log(2)}, 2000);
console.log('3');
$.ajax({
url: '/echo/json/',
dataType: 'json',
}).done(function(){
console.log(4);
});
console.log('5');
for (i=0; i<999999999; i++) {
}
console.log('6');function ajax1() {
return $.ajax({
url: '/url1',
dataType: 'json',
})
.done(function(){
console.log(1);
});
}
function ajax2() {
return $.ajax({
url: '/url2',
dataType: 'json',
})
.done(function(){
console.log(2);
});
}
ajax1();
ajax2();