karmadude

karmadude

How to find JavaScript memory leaks using heap snapshot

1. Open js-memory-leak.html in Chrome
2. Open developer tools and select Profiles tab
3. Select Take Heap Snapshot
4. Take a base snapshot
5. Click Create App five times
6. Take another snapshot

karmadude

// https://en.wikipedia.org/wiki/Happy_number
function happy(n) {
  if(typeof n === "undefined") throw new Error("Missing argument n");

  var result = {
    n: n,
    happy: true,
    seq: [n],
    toString: function() {
      return this.happy

karmadude

Contours of San Francisco overlayed over OpenStreeMap vector tiles using code from mbostock's vector tiles with multiple layers example. View the hi-res file

See gist for code used to generate contours.

karmadude

India Map Data

karmadude

Data

• Outline & major cities in TopoJSON
• States in TopoJSON
• 2011 Population in JSON

Uses

• d3.geo.mercator projection
• d3.geo.tile plugin
• Natural Earth II tiles

karmadude

A visualization of Indian state finances (revenues and expenditures) for 2010-2011

created for India60

karmadude

[
  {
    "abbr": "in",
    "name": "Union",
    "revenue": [
      {"name":"tax", "value": 574005},
      {"name":"non-tax", "value": 356008},
      {"name":"grants", "value": 2673}
    ],
    "expenditure": [

karmadude

// https://github.com/tmpvar/jsdom
// npm install jsdom
var jsdom = require('jsdom');

function scrapeDribbble (url, page) {
    dribbbles[page-1] = [];

    if (page > 1) {
        url = dribbbleURL + '/shots?page=' + page;
    }

karmadude

// https://github.com/felixge/node-mysql
// npm install mysql
var mysql = require('mysql');

// http://nodejs.org/docs/v0.6.5/api/fs.html#fs.writeFile
var fs = require('fs');

var client = mysql.createClient({
   user: 'root',
   password: 'mysqlpassword'