var arr = [{id:1,name:'java'},
{id:2,name:'css'},
{id:3,name:'scala'},
{id:4,name:'elm'},
{id:5,name:'go'}];
// Demonstrate the use of map function
// Iterating an array using java script
console.log('using vanilla java script');
for (var i=0;i<arr.length;i++){
console.log(arr[i].name);
}
// Iterating an array using map
console.log('using map function')
arr.map(val => console.log(val.name));
// Implementing map function
console.log('using my own map function')
Array.prototype.myMap = function(projection){
var results = [];
this.forEach(function(item){
results.push(projection(item));
})
};
arr.myMap(val=>console.log(val.name));
// Demonstrate the use of filter function
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