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

I open-source almost everything I can, and I try to reply to everyone needing help using these projects. Obviously, this takes time. You can integrate and use these projects in your applications for free! You can even change the source code and redistribute (even resell it).

However, if you get some profit from this or just want to encourage me to continue creating stuff, there are few ways you can do it:

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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