custom-unique

Generate custom and random unique strings.

npm install --save custom-unique

Examples

var customUnique = require('custom-unique');

var gen = customUnique.compile({n: '1n4n68dma98560d', a: '1234567890'}, '((n))-((a))-((n))-((a))');
gen(); // 08nmd5mn5a6141d-2335291955-6068n84a989n0a5-4633515073
gen(); // dnm85966885n60n-3751472625-4mdnd8606081854-5222094747

var serialGen = customUnique.compile({c: '1234567890', b: 'abcedfgh'}, '((c)4)-((b)4)-((c)4)-((b)4)');
serialGen(); // 4830-heea-0194-gfeg
serialGen(); // 5593-chcg-3889-ccch

API

function compile(config, format)

Creates a function that returns random strings.

Return value: function ([prefix][, suffix])

• config (Object) An object containing all values that will replace the corresponding placeholders in format.
• format (String) An string containing placeholders that will be replaced by random values composed by config.

Explanation

The keys of config can be referenced in format. Those references will be replaced by a random string composed of chars from the value of that key.

To reference a property from config, use the following syntax in format: ((property)).

This reference will be replaced by a random value composed of chars from config[property] , and it will have the length equal to config[property].

var config = {ex: '123'};
var format = '--((ex))--';

var gen = customUnique.compile(config, format);
gen(); // --231--
gen(); // --312--

You can define the length yourself using this syntax: ((property)length).

var config = {ex: '123'};
var format = '--((ex)10)--';

var gen = customUnique.compile(config, format);
gen(); // --1132222311--
gen(); // --1312313113--

You may add prefixes and suffixes to the generated strings.

var config = {ex: '123'};
var format = '--((ex)10)--';

var gen = customUnique.compile(config, format);
gen('ID-'); // ID---2212122311--
gen('', 'HI'); // --1312313113--HI
gen('PHOTO', 'HI'); // PHOTO--1312313113--HI