karmia-utility-array

Karmia utility array module

Usage

const karmia_utility_array = require('karmia-utility-array').default,
    karray = new karmia_utility_array();

unique

• list <Array>

Removes duplicate values from an array

count

• list <Array>
• item <*>

Count item in list

range

• start <number>
• stop <number>
• step <number> Default: 1

Get array of integer from start to end

karray.range(5);
// => [0, 1, 2, 3, 4]

karray.range(5, 10);
// => [5, 6, 7, 8, 9]

karray.range(3, 10, 3);
// => [3, 6, 9]

flip

• list <Array>

Get object that exchanges index with their value

karray.flip(['a', 'b', 'c', 'd', 'e']);
// => {a: 0, b: 1, c: 2, d: 3, e: 4}

intersection

• list1 <Array>
• list2 <Array>

Get intersection of two arrays

const list1 = ['a', 'b', 'b', 'c', 'c', 'c'],
    list2 = ['a', 'b'];

console.log(karray.difference(list1, list2));
// => ['a', 'b']

difference

• list1 <Array>
• list2 <Array>

Get difference of two arrays

const list1 = ['a', 'b', 'b', 'c', 'c', 'c'],
    list2 = ['a', 'b'];

console.log(karray.difference(list1, list2));
// => ['c', 'c', 'c']