slice_demo.js

//slice() example

var cityNames = ['Mumbai', 'Delhi', 'Pune', 'Ahmadabad', 'Indore'];
console.log("City names:", cityNames); 
// Output : City names: [ 'Mumbai', 'Delhi', 'Pune', 'Ahmadabad', 'Indore' ]

var newCities = cityNames.slice(); // gets all - shallow copy
console.log(newCities); //[ 'Mumbai', 'Delhi', 'Pune', 'Ahmadabad', 'Indore' ]

var newTwoCities = cityNames.slice(1, 3); // start from 1st index and before 3rd
console.log(newTwoCities); //[ 'Delhi', 'Pune' ]

var remainingCities = cityNames.slice(1); // start from 1st index and extract rest
console.log(remainingCities); //[ 'Delhi', 'Pune', 'Ahmadabad', 'Indore' ]

// If start is greater than the index or negative, an empty array is returned.
var otherCities = cityNames.slice(-1, 3); //cityNames.slice(5, 4);
console.log(otherCities); // []

var initialCities = cityNames.slice(0, -2); //extract from the start/remove from end 
console.log(initialCities); // [ 'Mumbai', 'Delhi', 'Pune' ]