node pmap code example
Example 1: nodejs map
let wrongMap = new Map()
wrongMap['bla'] = 'blaa'
wrongMap['bla2'] = 'blaaa2'
console.log(wrongMap) // Map { bla: 'blaa', bla2: 'blaaa2' }
Example 2: javascript map
array.map( item => item.id )
array2.map( item => item.toString() )
array2.map( item => item * 3 )
// this will apply a transformation to all elements of an array
// "" item => something "" is the transformation (function)