madhums

#!/bin/sh

# Usage:
# curl https://gist.githubusercontent.com/madhums/3791075/raw/38675884dfb7e3acd5672092807da54509748266/nodejs-install-update.sh | sh -s 0.8.10

# This script will simply install/update node.js to the version you specify.
# It will be installed/updated to $HOME/local/node

NODEJS=$1

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var serializeHash = function () {
    var attrs = {};

    $.each($(this).serializeArray(), function(i, field) {
        attrs[field.name] = field.value;
    });

    return attrs;
};

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/* 
   Some simple Github-like styles, with syntax highlighting CSS via Pygments.
*/
body{
	font-family: helvetica, arial, freesans, clean, sans-serif;
	color: #333;
	background-color: #fff;
	border: none;
	line-height: 1.5;
	margin: 2em 3em;

madhums

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
    // the rest of your code goes here.
});

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tl;dr

If you must nest functions in a way that requires access to multiple this', alias outer this to something meaningful - describe the value it's holding. Treat this as the invisible first argument.

In general though, avoiding the situation (nested functions and frivolous use of this) will frequently produce clearer results.

Naming this in nested functions

I was accidentally included in a discussion on how to best name this in nested functions in JavaScript. +1's were given to this suggestion of using _this.

Giving style advice on naming nested this without a meaningful context isn't too helpful in my opinion. Examples below have been altered to have at least some context, although a completely contrived and stupid one.

madhums

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var assert = require('assert')

console.log('\n===========');
console.log('    mongoose version: %s', mongoose.version);
console.log('========\n\n');

mongoose.connect('localhost', 'testing_1088');
mongoose.connection.on('error', function () {

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// Render mobile views
// if the request is coming from mobile and if you have a view
// with users.mobile.jade, then that view will be rendered
app.use(function (req, res, next) {
  res._render = res.render

  res.render = function (template, locals, cb) {
    var ua = req.header('user-agent')
    var fs = require('fs')

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1. http://ux.stackexchange.com/questions/3177/is-left-aligned-text-generally-preferable-over-centered-text
2. http://www.ixda.org/node/14744
3. http://uxmovement.com/content/why-you-should-never-center-align-paragraph-text/
4. http://ux.stackexchange.com/questions/24025/should-web-app-text-be-justified

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function (obj, arr) {
  var index = arr.push(obj);
  if (obj.prev) {
    arr.splice.apply(arr, [index - arr.length, 0].concat(this.timeline(obj.prev, [])));
  }
  if (obj.next) {
    arr.splice.apply(arr, [index + arr.length, 0].concat(this.timeline(obj.next, [])));
  }
  return arr;
}

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$ find app/views -name "*.jade" -type f|xargs rm -f