javascript check if value in object array code example
Example 1: if object is array javascript
Array.isArray(object);
Example 2: how to check if an element exists in an array of objects js
var arr = [{ id: 1, username: 'fred' },
{ id: 2, username: 'bill'},
{ id: 3, username: 'ted' }];
function userExists(username) {
return arr.some(function(el) {
return el.username === username;
});
}
console.log(userExists('fred'));
console.log(userExists('bred'));
Example 3: check if object is present in array javascript
function containsObject(obj, list) {
var i;
for (i = 0; i < list.length; i++) {
if (list[i] === obj) {
return true;
}
}
return false;
}
function containsObject(obj, list) {
var x;
for (x in list) {
if (list.hasOwnProperty(x) && list[x] === obj) {
return true;
}
}
return false;
}
Example 4: javascript array contains object
if (array.index(object) !== -1) {
console.log(`my object is in my array`)
}
if(array.includes(oject)) {
console.log(`my object is in my array`)
}