javascript set dynamic property name from parameter code example

Example 1: dynamic properties instead javascript

var foo = { pName1 : 1, pName2 : [1, {foo : bar }, 3] , ...}

var name = "pName"
var num  = 1;

foo[name + num]; // 1

// -- 

var a = 2;
var b = 1;
var c = "foo";

foo[name + a][b][c]; // bar

Example 2: nodejs how to use dynamic variable after dot

model.car // static way

const myDynamicVariable = 'car'
model[myDynamicVariable] // works like model.car - here you can dynamicly use a variable after dot