ktilcu

Question

Which version of the code resonates with how you think about things?

Aside

I'm sure there are problems with this code and there are likely better ways but I chose each of these implementations on purpose.

Answers

Please answer in the gist comments so I can track them. We can carry on the conversation in chat ##javascript or #Node.js.

ktilcu

const getAvatars = async (userId) => {
  const user = await getUser(userId);
  const avatar = await user.avatar();
  const friends = await user.friends();
  return [avatar, ...await Promise.all(friends.map(friend => friend.avatar())]
}

ktilcu

Imagine a function getUser that returns a Promise that resolves to a user. A user has friends and avatar methods that resolve to a list of users and an avatar respectively.

Imagine a user module that provides access to:

• a user
• a user's avatar
• a user's friends
• a user's friends avatars
• a user's avatar + friends' avatars

ktilcu

const Promise = require("bluebird");

function getUserAndFriendsAvatars(user) {
    return Promise.try(() => {
        return getUser(user);
    }).then((user) => {
        return Promise.all([
            user.avatar(),
            user.friends()
        ]);

ktilcu

var Promise = require('bluebird');
var sqs = require('./queue');
var R = require('ramda');

var cli = require('cli');

var options = cli.parse({
  dest: ['d', 'Destination queue url', 'string', undefined]
});

ktilcu

#!/usr/bin/env python3
import argparse
import itertools

ap = argparse.ArgumentParser()
ap.add_argument('file', nargs='*', type=argparse.FileType('r'))
ap.add_argument('-p', '--pad-char', default=' ')
ap.add_argument('-d', '--delimiter', default=' ')
ap.add_argument('-c', '--pad-color', default=None)
ap.add_argument('-s', '--align-spec', default='')

ktilcu

// type alias DOM = Object // unknown structure, defined by Cheerio
// type alias Selector = String // like a jquery selector (e.g., '#omg') 

// selectAll :: Selector -> DOM -> List DOM
const selectAll = R.curry((sel, dom) => {
  const res = dom(sel);
  return R.map(cheerio, res.toArray());
});

// selectFirst :: Selector -> DOM -> Maybe DOM

ktilcu

const Future = require('fluture');

// (Number -> Number) -> Number -> Future a b -> Future (List a) b
const retry = (time, max, task) => {
  const failures = new Array(max);
  return (function recurse(i) {
    return task.chainRej(function(failure) {
      failures[i] = failure;
      const total = i + 1;
      return total === max

ktilcu

	function doubleBarrel (fn) {
		return function (a,b) {
			var len = a.length > b.length ? b.length : a.length;
			if (len == 0) {
				return a.length > b.length ? a : b;
			}
			var idx = 0;
			var out = [];
			while (idx < len) {
				out.push(fn(a[idx], b[idx]));

ktilcu

const db = require('./db');
const express = require('express')
const app = express()

app.get('/', (req, res) => res.send('Hello World!'))

db.init()
  // after init
  .then(() => app.listen(3000, () => console.log('Example app listening on port 3000!')))