Random acronym generator

acrogen.js

var english_words = require('an-array-of-english-words');

function lookup(word) {
  return english_words
    .filter(x => { return x.startsWith(word); })
    .sort((a, b) => { return 0.5 - Math.random(); });
}

function suggest(word, count, cb, constants) {

  let splitter = new RegExp(`.{1,${count}}`,'g');
  let parts = word.match(splitter);
  let display = parts.join('-')
  console.log('Generating suggestions for', display);

  let lists = parts.map(lookup);
  let limit = lists
    .map(x => x.length)
    .reduce((a, b) => {
      return Math.min(a,b);
    });

  for(let i = 0; i < limit; i++) {
    let selection = lists.map(x => x[i]);
    if(constants && constants.length) {
      let location = selection.length - constants.length;
      selection = selection.splice(constants.length, location);
      selection = constants.concat(selection);
    }
    cb(selection);
  }

  console.log(`Displaying ${limit} suggestions for ${display}`);
}

function on_result(words) {
  console.log(words);
}

let word = "test";
suggest(word, 2, on_result, []);