JAVASCRIPT

update property in object in array javascript

var result = foo.map(el => el.bar == 1 ? {...el, baz: [11,22,33]} : el);

change property in array of objects javascript

//change in array itself without need to another one 
arr.map(el =>{ el.bar == 1 && el.baz--} ); // don't forget {} in arrow function

update property of object in array javascript

foo.forEach(function(obj) {
    if (obj.bar === 1) {
        obj.baz[0] = 11;
        obj.baz[1] = 22;
        obj.baz[2] = 33;
        // Or: `obj.baz = [11, 22, 33];`
    }
});