craigdallimore

Transduce

• Ramda - transduce

• Also see

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What is transduce? What is it for? This document is intended to help people (such as myself) who would be looking through the ramda docs, find transduce and have no idea if it would be a good fit for my current problem.

craigdallimore

// A function that takes a number and returns a Promise for nothing but
// some logging side effects.
const vow = num => new Promise(resolve => {
  console.log(`start ${num}`);
  setTimeout(() => {
    console.log(`done  ${num}`);
    resolve();
  }, Math.random() * 500);
});

craigdallimore

let mkFuture = v => Future((reject, resolve) => {
  
  console.log(`start: ${v}`);

  setTimeout(() => {
    console.log(`resolve: ${v}`)
    resolve(v);
  }, Math.random() * 1000);
  
});

craigdallimore

// mkFuture
// :: Any next
// -> Any prev
// -> Future next
let mkFuture = next => prev => Future((reject, resolve) => {
  
  console.log(`start: ${prev},${next}`);

  setTimeout(() => {
    console.log(`resolve: ${prev},${next}`)

craigdallimore

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