JAVASCRIPT

javascript return object property from array

// ES5 compatible browsers
let result = objArray.map(a => a.foo);
OR
let result = objArray.map(({ foo }) => foo)

// FOR IE8 or older
var result = objArray.map(function(a) {return a.foo;});

return object from array by property value

function variableName(value) {
    for (var i=0, iLen=array.length; i<iLen; i++){
        if (array[i].property == value) return array[i]
    }
};