one-by-one

Run async tasks one by one.

If you want to run async functions in parallel, check out same-time.

:cloud: Installation

# Using npm
npm install --save one-by-one

# Using yarn
yarn add one-by-one

:clipboard: Example

const oneByOne = require("one-by-one");

// Call these functions one by one
oneByOne([
    cb => {
        setTimeout(function () {
            cb(null, "Hello World");
        }, 1000);
    }
  , (cb, data) => {
        console.log(data);
        // => "Hello World"
        setTimeout(function () {
            cb(new Error("Some error"));
        }, 100);
    }
  , cb => {
        // This will NOT be triggered because the
        // previous sent an error
        cb(null, null);
    }
], (err, data) => {
    console.log(err, data);
    // => [Error: Some error] [ 'Hello World' ]
});

// Call these functions one by one
oneByOne([
    Math.random() > 0.5 ? next => {
        console.log("Generated a random number greater than 0.5.");
        next();
    } : null
  , cb => setTimeout(
        () => cb(null, "Hello World")
      , 1000
    )
  , (cb, prev) => setTimeout(
        () => cb(null, prev.replace("World", "Mars"))
      , 1000
    )
], (err, data, message) => {
    console.log(err, data, message);
    // null [ 'Hello World', 'Hello Mars' ] 'Hello Mars'
});

:question: Get Help

There are few ways to get help:

1. Please post questions on Stack Overflow. You can open issues with questions, as long you add a link to your Stack Overflow question.
2. For bug reports and feature requests, open issues. :bug:
3. For direct and quick help, you can use Codementor. :rocket:

:memo: Documentation

oneByOne(arr, cb)

Calls functions one by one and memorizes the results.

Params

• Array arr: An array of functions getting the callback parameter in the first argument and response arguments from the previous function call.
• Function cb: The callback function called with an error (or null) and the results array.

Return

• oneByOne The oneByOne function.

:yum: How to contribute

Have an idea? Found a bug? See how to contribute.

:sparkling_heart: Support my projects

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Thanks! :heart:

:dizzy: Where is this library used?

If you are using this library in one of your projects, add it in this list. :sparkles:

• image-to-ascii
• gry
• bloggify-plugin-loader
• bible.js
• git-package-json
• engine-tools
• bloggify-mongoose
• blah
• asyncer.js
• babel-it
• gif-cli
• cobol
• nodeice
• np-init
• made-in-romania
• fortran
• ssh-remote
• tester-init
• tilda-init
• cdnjs-importer
• @isysd/gpm
• ship-release
• git-stats-importer
• gpm
• made-in-india
• machine-ip
• made-in-brazil

:scroll: License

MIT © Ionică Bizău