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')); // true
console.log(userExists('JUMBO')); // falsehow 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')); // true
console.log(userExists('bred')); // falsetypescript check if object has key
if ('key' in myObj)array has object with property js
myArray.some(obj => obj.property === 'value')
// returns true or falsecheck if object is present in array javascript
//Use something like this:
function containsObject(obj, list) {
var i;
for (i = 0; i < list.length; i++) {
if (list[i] === obj) {
return true;
}
}
return false;
}
//In this case, containsObject(car4, carBrands) is true. Remove the carBrands.push(car4); call and it will return false instead. If you later expand to using objects to store these other car objects instead of using arrays, you could use something like this instead:
function containsObject(obj, list) {
var x;
for (x in list) {
if (list.hasOwnProperty(x) && list[x] === obj) {
return true;
}
}
return false;
}check object in array javascript
var obj = {a: 5};
var array = [obj, "string", 5]; // Must be same object
array.indexOf(obj) !== -1 // TrueCopyright © 2021 Codeinu
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