bahmutov

/**
 Example: timeout with message, just like Q.promise.timeout
 
  foo()
  .timeout(500, 'promise timed out!')
  .then(function () {
    console.log('foo has been resolved!');
  })
  .fail(function (msg) {
    console.log('failed with value:', msg);

bahmutov

// __proto__ DOES NOT WORK
var foo = Object.create(null);
foo.__proto__ = {
  bar: 'bar'
};
foo;      // { [__proto__]: { bar: 'bar' } }
foo.bar;  // undefined

// __proto__ works
var foo = {};

bahmutov

var _ = require('lodash');
var fp = require('functional-pipeline');

var items = [{
  toString: function () {
    return 'foo';
  }
}, {
  toString: function () {
    return 'bar';

bahmutov

var calc = new function () {
  this.add = function add(a, b) { return a + b; };
  this.sub = function sub(a, b) {
    return this.add(a, -b);
  };
};
console.log(calc.add(2, 3)); // 5
console.log(calc.sub(2, 3)); // -1
var subtract = calc.sub;
console.log(subtract(2, 4)); // exception: this.add is undefined

bahmutov

file_path=bower_components/angular-bindonce/bindonce.js
before_commit=$(git rev-parse --verify 14f0b9d)
file_blob=$(git hash-object -w "$file_path")

echo "before commit $before_commit"
echo "file blog $file_blob"

git filter-branch \
  --index-filter '

bahmutov

/*
  Using ServiceWorker, every request (except from iframes) can be intercepted and the javascript 
  could be changed before returning the result. Here is an example that if "*foo.js" is
  requested, downloads it, but then returns 'console.log("hi there");'
  
  Related: https://github.com/bahmutov/service-turtle/issues/7
*/
var allowJavaScriptFromAnywhere = {
  'Access-Control-Allow-Origin': '*',
  'Content-Type': 'text/javascript; charset=utf-8'

bahmutov

// I am trying to open PouchDB normally, but this fails in Firefox Incognito mode
var db = new PouchDB('test');
// InvalidStateError
// I see the idb error callback being called if the open request fails
exports.idbError = function (callback) {
  return function (event) {
    var message = (event.target && event.target.error &&
      event.target.error.name) || event.target;
    callback(errors.error(errors.IDB_ERROR, message, event.type));
  };

bahmutov

// NOTE does not work in strict mode
function parent(a, b) {
  console.log('in parent, a', a, 'b', b);
  var parentArguments = arguments;

  function child() {
    console.log('in child, a', a, 'b', b);
    console.log('is parentArguments === c.args?', parentArguments === c.args);
    console.log('parentArguments', parentArguments);
    return a + b;

bahmutov

QUnit.extend( QUnit, {
    expectSuccess: function (promise, message) {
        if (!promise) {
            QUnit.push(false, 'undefined promise', 'promise object', 'missing a promise');
            QUnit.start();
        } else {
            promise.then(function onSuccess(successMessage) {
                QUnit.push(true, null, null, successMessage);
                QUnit.start();
            }, function onFailure(errorMessage) {

bahmutov

On Mac OSX

To find the local network (WIFI usually) address ipconfig getifaddr en0

ipconfig getifaddr en0

192.168.0.8