splice exo

splice.js

var items;

// insertAt //////////////////////////////////

function insertAt(arr, pos, item) {

}

items = ['one', 'two', 'three'];
console.assert(insertAt(items, 1, 'yo') === 4);
console.assert(items[1] === 'yo');

// deleteAt //////////////////////////////////

function deleteAt(arr, pos, count) {

}

items = ['one', 'two', 'three', 'four'];
var result = deleteAt(items, 1, 2);
console.assert(result.length === 2);
console.assert(items[0] === 'one');
console.assert(items[1] === 'four');
console.assert(result[0] === 'two');
console.assert(result[1] === 'three');

// multiShift //////////////////////////////////

function multiShift(arr, count) {

}

items = ['one', 'two', 'three']
result = multiShift(items, 2);
console.assert(result.length === 2);
console.assert(result[0] === 'one');
console.assert(result[1] === 'two');
console.assert(items.length === 1);
console.assert(items[0] === 'three');

// multiPop //////////////////////////////////

function multiPop(arr, count) {

}

items = ['one', 'two', 'three', 'four', 'five', 'six']
result = multiPop(items, 2);
console.assert(result.length === 2);
console.assert(result[0] === 'five');
console.assert(result[1] === 'six');
console.assert(items.length === 4);
console.assert(items[0] === 'one');
console.assert(items[1] === 'two');
console.assert(items[2] === 'three');
console.assert(items[3] === 'four');