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Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.

vermaslal

Example code for exporting data in a table to a csv file.
- Added IE support & check (@kalebdf, 8/19/2015)

http://bl.ocks.org/kalebdf/ee7a5e7f44416b2116c0

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var child_process = require('child_process'),
	http = require('http');
	url = require('url'),
	ffmpeg = null;
    
var livestream = function (req, resp) {
    // For live streaming, create a fragmented MP4 file with empty moov (no seeking possible).

	var input = 'udp://225.1.1.1:8208';

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function insertCollection(collection, callback) {
  var coll = collection.slice(0); // clone collection
  (function insertOne() {
    var record = coll.splice(0, 1)[0]; // get the first record of coll and reduce coll by one
    db.insert(record, function(err) {
      if (err) { callback(err); return }
      if (coll.length == 0) {
        callback();
      } else {
        insertOne();

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$ wget http://people.centos.org/tru/devtools-2/devtools-2.repo -O /etc/yum.repos.d/devtools-2.repo
$ yum install devtoolset-2-gcc devtoolset-2-binutils
$ yum install devtoolset-2-gcc-c++ devtoolset-2-gcc-gfortran

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$.extend({
      getUrlVars: function () {
          var vars = {}, hash;
          var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
          for (var i = 0; i < hashes.length; i++) {
              hash = hashes[i].split('=');
              vars[hash[0]] = hash[1];
          }
          return vars;
      },

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'use strict';
//Reference: https://www.safaribooksonline.com/blog/2013/05/01/using-streams-in-node-js/
var fs = require('fs');
var stream = require('stream');
//var Transform = require('stream').Transform;
var mx = {};
mx.bind_helo = '--------sham-----';


var source = fs.createReadStream('/home/sarv/node_modules/smail/s.txt');

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var source = '<a href="double-quote test">double-quote test</a>\n' +
        '<a href=\'single-quote test\'>single-quote test</a>\n' +
        '<a href=\'single-quote test\'>single-quote test</a>\n' +
        '<a class="foo" href="leading prop test">\n' +
        '<a    href="trailing prop test"   class="foo">\n' +
        '<a style="bar" link="baz" ' +
        'name="quux" ' +
        'href="multiple prop test" class="foo">\n' +
        '<a class="foo"\n href="inline newline test"\n style="bar"\n >inline newline test</a>' +
        '<a href=3D"with 3d data double quote"\n style="bar"\n >with 3d data double quote</a>' +

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var cluster = require('cluster');
var numCPUs = require('os').cpus().length;
var express = require("express");
var app = express();
if (cluster.isMaster) {
  // Fork workers.
  for (var i = 0; i < numCPUs; i++) {
    cluster.fork();
  }

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function ksort(obj){
  var keys = Object.keys(obj).sort()
    , sortedObj = {};

  for(var i in keys) {
    sortedObj[keys[i]] = obj[keys[i]];
  }

  return sortedObj;
}