javascript check if item exists in array of objects code example
Example 1: javascript check if value exists in array of objects
var arr = [{ id: 1, name: 'JOHN' },
{ id: 2, name: 'JENNIE'},
{ id: 3, name: 'JENNAH' }];
function userExists(name) {
return arr.some(function(el) {
return el.name === name;
});
}
console.log(userExists('JOHN'));
console.log(userExists('JUMBO'));
Example 2: 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;
}