javascript get properties of object array as array code example

Example 1: array objects to array of one property

let result = objArray.map(a => a.foo);

Example 2: get all id from array of objects javascript

function getFields(input, field) {
    var output = [];
    for (var i=0; i < input.length ; ++i)
        output.push(input[i][field]);
    return output;
}

var result = getFields(objArray, "foo"); // returns [ 1, 3, 5 ]