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transformer

transformer

transformer

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Transform data using synchronous and asynchronous functions.

☁️ Installation

$ npm i --save transformer

📋 Example

const Transformer = require("transformer");
 
let t = new Transformer({ world: "Earth" });
 
 
// There are three levels where the functions are added to be executed: 
// 
// Parallel:               | <0: [.............................................]> 
// Unordered (don't wait): |                                <4a: [........]> 
//                         +                                <4b: [....]> 
//                         +                                <4c: [......]> 
// Ordered (wait):         | <1: [...]> <2: [.]> <3:[.....]>                <5: [....]> 
 
// This will run in parallel with all the other functions 
t.add((data, cb) => {
    setTimeout(() => {
        data.parallel = 42;
        cb();
    }, 2000);
}, Transformer.PARALLEL);
 
// Async function, but ordered 
t.add((data, cb) => {
    setTimeout(() => {
        data.oldWorld = data.world;
        data.world = "Mars";
        cb();
    }, 1000);
});
 
// Another async function and ordered 
t.add((data, cb) => {
    setTimeout(() => {
        data.baz = 7;
        cb();
    }, 500);
});
 
// Async function, but not ordered 
t.add((data, cb) => {
    setTimeout(() => {
        data.foo = 42;
        cb();
    }, 1000);
}, Transformer.UNORDERED);
 
// Another unordered function (this will end sooner) 
t.add((data, cb) => {
    setTimeout(() => {
        data.bar = 42;
        cb(null, data);
    }, 900);
}, Transformer.UNORDERED);
 
// Sync function 
t.add(data => {
    data.planet = data.world;
});
 
// Finally show the data 
t.on("end", (err, data) => console.log(data));
// => { world: 'Mars' 
//    , parallel: 42 
//    , oldWorld: 'Earth' 
//    , baz: 7 
//    , bar: 42 
//    , foo: 42 
//    , planet: 'Mars' } 

❓ 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. 🐛
  3. For direct and quick help from me, you can use Codementor. 🚀

📝 Documentation

transformer(data, opts)

Transformer Transforms the data using synchronous and asynchronous functions.

Params

  • Object data: The data object.
  • Object opts: The options object:
  • autostart (Boolean): If true, the functions will be executed, without calling the start() method.

Return

  • Number Return description.

add(fn, type)

Adds a new function.

There are three levels where the functions are added to be executed:

Parallel: | <0: [.............................................]> Unordered (don't wait): | <4a: [........]> + <4b: [....]> + <4c: [......]> Ordered (wait): | <1: [...]> <2: [.]> <3:[.....]> <5: [....]>

Params

  • Function|Transformer fn: The function to add. Note you can add an existing transformer instance as well.
  • TransformerType type: One of the following:
    • Transformer.PARALLEL: Used to append on the parallel timeline.
    • Transformer.UNORDERED: Grouped, but unordered.
    • Transformer.ORDERED: Grouped, but ordered.

Return

  • Transformer The current Transformer instance.

start(data, fn)

Starts the function execution.

Params

  • Object data: The data object.
  • Function fn: The callback function.

😋 How to contribute

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

💖 Support my projects

I open-source almost everything I can, and I try to reply 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:

  • Starring and sharing the projects you like 🚀

  • PayPal—You can make one-time donations via PayPal. I'll probably buy a coffee tea. 🍵

  • Support me on Patreon—Set up a recurring monthly donation and you will get interesting news about what I'm doing (things that I don't share with everyone).

  • Bitcoin—You can send me bitcoins at this address (or scanning the code below): 1P9BRsmazNQcuyTxEqveUsnf5CERdq35V6

Thanks! ❤️

💫 Where is this library used?

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

  • launchjs—Launch Application Framework
  • lien—Another lightweight NodeJS framework. Lien is the link between request and response objects.

📜 License

MIT © Ionică Bizău