vaz

#!/bin/sh
set -e

function randomfile {
  local numbytes="$1"
  local outfile="$2"

  { cat /dev/urandom |    # read random byte stream
    base64 |              # base64-encode the garbage so it's safely printable
    fold -w 79 |          # fold lines at 79 chars (80 char line w/ newline)

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function g() {
  let a='Noel';
  let b='Yuletide';
  let c='Santa Claus';
  let d='Rudolph';
  let e='Snowflake';
  let f='Occasion';
  let g='North Pole';
  let h='Christmas Tree';
  let i='Joy';

vaz

function benchmark(cb) {
  const start_time = 12345;

  const result = cb('some message');
  console.log("the return value of cb was: ", result);

  const end_time = 12456;
  return end_time - start_time
}

vaz

Knex seeds: associating records

It's easiest if you're associating records between tables if you do it in one seed file. There are other ways but for now this is probably easiest.

PostgreSQL will generate your id fields for you, so don't put them in your seeds! Instead, take advantage of the returning chainable method from knex. See the below seed file and also http://knexjs.org docs.

vaz

Vagrant fixes for file-watching servers

These snippets show how to enable polling for filesystem changes when using

• nodemon for Node apps (ExpressJS, etc)
• rails server
• webpack-dev-server --watch
• ember server

You can probably look at these examples and Google to find similar solutions for other dev servers.

vaz

var request = require('request');

var url = 'http://www.google.com';

// basic use
request.get(url, function(err, response, body) {
  if (err) {
    console.log("Error:", err);
  } else {
    // response.body == body

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// Promises example
//

// just a helper, which returns a promise that resolves after
// 500-1000 milliseconds with whatever `args` were passed in
function fakeKnex(...args) {
  return new Promise((resolve, reject) => {
    setTimeout(
      function() { resolve(...args) },
      500 + (Math.floor(Math.random() * 500)))

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// this is coming from a library
function delayedValue(x) {
  return new Promise((resolve, reject) => {
    setTimeout(() => resolve(x), 1000)
  })
}

// module doQuery.js
function doQuery() {
  return delayedValue({

vaz

# ActiveRecordish pattern
def create
  @thing = Thing.create!(thing_params)
  redirect_to @thing
rescue Thing::Invalid #???
  # flash error
  # re-render
end

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// If the first statement in a file or a function is "use strict"
// then Strict Mode will be activated for that file or function.
//
// You could invoke strict mode for the file by uncommenting this:
// "use strict";

function nonStrictFunction () {
  x = 123; // undeclared!
}