how to map an array of objects in javascript code example

Example 1: javascript create array of objects with map

var arr = [{
  id: 1,
  name: 'bill'
}, {
  id: 2,
  name: 'ted'
}]

var result = arr.map(person => ({ value: person.id, text: person.name }));
console.log(result)

Example 2: typescript map list to new list of objects

var result = arr.map(person => ({ value: person.id, text: person.name }));
console.log(result)

Example 3: map a property from array of objects javascript

var result = objArray.map(function(a) {return a.foo;});

Example 4: javascripr array.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)