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    2.0.0 • Public • Published

    qinu NPM version Bower version

    Highly customizable generator of [random] strings.


    Via NPM

    Install the package

    $ npm install qinu

    require it

    const qinu = require('qinu')

    Via Bower

    Install the package

    $ bower install qinu

    add script on page

    <script src="/bower_components/qinu/qinu.min.js"></script>

    as well you can do it with RequireJS or any similar tool.


    Basic usage

    // Generates 32-character random string, e.g. '4plugjpebgyqduvwcy7lo74wj4idxu5w'
    const randomString = qinu()

    Using with options

    // Generates 64-character random string
    // that contains only hexadecimal numbers,
    // e.g. 'df6x4ou3p5tar625301dfuftqd8rh9kxwcjl6t0mtmxke3a9q8wuu3nhvrtrn3na'
    const randomString = qinu({
      // The length of output string
      length: 64,
      // The set of characters to be used by qinu
      dict: '1234567890abcdef'

    Using with template

    // Generates string corresponding to template,
    // e.g. 'LABEL: hjwjd4hk4cpx7b1ekh9vdmvsnob228bf SUFIX'
    const randomString = qinu(
      // Set template for output string
      { template: '%arg[0]%: %qinu% %arg[1]%' },
      // Pass arguments for template
      [ 'LABEL', 'SUFIX' ]

    %qinu% will be replaced with generated random string. Each passed argument will replace the relative code %arg[<index>]%.

    Instead of array you can pass all template arguments as function arguments:

    // It works the same as an example above
    const randomString = qinu(
      // Set template for output string
      { template: '%arg[0]%: %qinu% %arg[1]%' },
      // Pass arguments for template

    There is another option to pass arguments to the template, via args option:

    // Still, the same as examples above
    const randomString = qinu({
      template: '%arg[0]%: %qinu% %arg[1]%',
      args: [ 'LABEL', 'SUFIX' ]

    In case when both described options will be used arguments will be merged: args from the options object will be in the beginning and arguments from the function argument will be in the end:

    // Still, no difference
    const randomString = qinu(
        template: '%arg[0]%: %qinu% %arg[1]%',
        args: [ 'LABEL' ]

    Using predefined options

    You can create qinu-generator with predefined options:

    const qinuCustom = qinu.create({
      template: '%arg[0]%-%arg[1]%-%qinu%'
    // Generates string corresponding to template,
    // e.g. 'group-label-wh0qothao58nk0zno2g86ct4gl3j9wa7'
    const randomString = qinuCustom('group', 'label')
    // or use it with array
    const anotherRandomString = qinuCustom(['group', 'label'])

    When using qinu.create() generated results are ordered in a sequence. This behavior can be changed using random option

    Shortcut for length property

    In case you need to specify only the length:

    // Generates 64-character random string
    const randomString = qinu(64)
    // The shortcut can be applied to create method as well:
    const generateRandom10Characters = qinu.create(10)
    // Generate 10-character random string
    const randomString = generateRandom10Characters()

    Generating unique sequence (random option)

    In case if absolute uniqueness is required during the session, qinu.create() creates a function that first generate a random value and then iterate it one-by-one. This makes it impossible to generate the same string unless all possible combinations wasn't generated.

    const next = qinu.create({ length: 3, dict: 'abc' })
    next() // 'abb'
    next() // 'abc'
    next() // 'aca'

    If randomness is preferred pass random: true when create generator:

    const generate = qinu.create({ random: true, length: 3, dict: 'abc' })
    generate() // 'ccb'
    generate() // 'aaa'
    generate() // 'baa'


    MIT © Stanislav Termosa


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