find array object by key and delete code example

Example 1: locate and delete an object in an array

// we have an array of objects, we want to remove one object using only the id property
var apps = [{id:34,name:'My App',another:'thing'},{id:37,name:'My New App',another:'things'}];
 
// get index of object with id:37
var removeIndex = apps.map(function(item) { return item.id; }).indexOf(37);
 
// remove object
apps.splice(removeIndex, 1);

Example 2: locate and delete an object in an array

var people = [
    {name: 'Billy', age: 22},
    {name: 'Sally', age: 19},
    {name: 'Timmy', age: 29},
    {name: 'Tammy', age: 15}
];
_.remove(people, function(e) {
    return e.age < 21
});
console.log(people);

// Output
// [ { name: 'Billy', age: 22 }, { name: 'Timmy', age: 29 } ]