DEV Community

Harsh Joshi
Harsh Joshi

Posted on

Fun Experiment: Bringing lazy execution to JS!

#javascript #webdev #npm #opensource

Bringing lazy execution to higher order functions in JS!
Teaser
How to Use

  • Install the package
    npm i lazy-hofs

  • Add to your project
    require("lazy-hofs");

lazySome()

let arr = [1, 2, 3, 4, 5, 6]; let ref = arr.lazySome((it) => { return it === 9; }); arr.push(9); let result = ref.lazyEvaluate(); console.log(result);
Enter fullscreen mode Exit fullscreen mode

lazyMap()

let arr = [1, 2, 3, 4, 5, 6]; let ref = arr.lazyMap((it) => { return it * 9; }); arr.push(9); let result = ref.lazyEvaluate(); console.log(result);
Enter fullscreen mode Exit fullscreen mode

lazyFilter()

let arr = [1, 2, 3, 4, 5, 6]; let ref = arr.lazyFilter((it) => { return it % 2 === 0; }); arr.push(9); let result = ref.lazyEvaluate(); console.log(result);
Enter fullscreen mode Exit fullscreen mode

lazyReduce()

let arr = [1, 2, 3, 4, 5, 6]; let ref = arr.lazyReduce((it, acc) => { return (acc += it); }, 0); arr.push(9); let result = ref.lazyEvaluate(); console.log(result);
Enter fullscreen mode Exit fullscreen mode

Join me here: https://npmjs.com/package/lazy-hofs
Contributions welcome!

Top comments (2)

Collapse
 
jonrandy profile image
Jon Randy 🎖️ •

Maybe you could consider using my Metho library to do the monkey patching of the array prototype in a safe way that will not risk conflicts with other libraries

Collapse
 
josharsh profile image
Harsh Joshi •

Thanks Jon, will give it a read