kevjose

var param1 = 'value1';
function method(){
  console.log(this.param1);
}

var obj = {
  param1: 'value2',
  method: function(){
    console.log(this.param1);
  }

kevjose

var obj ={
  param1: 'value1',
  param2: 'value2',
  method: function(){
    console.log(this.param1, this.param2);
    console.log(obj.param1, obj.param2);
  }
}

kevjose

/*
* Let server be running at http://localhost:3000
*/
// server.js
var index = require('./routes/index');
var users = require('./routes/users');

app.use('/', index);
app.use('/users', users);//this will prefix all user routes with users. Namespace effect.

kevjose

become active record migration expert (Rails 4.0.2)

workflow:

create model

$ rails g model NameOfModel
    invoke  active_record
    create    db/migrate/YYYYMMDDHHMMSS_create_name_of_models.rb

kevjose

/**
 * Regex to find occurences in the lines in any order from different pools (OR and AND) 
 **/
var pattern = /(?=(?=.*\beducation\b)|(?=.*\bhealth\b))(?=(?=.*\bvideo\b)|(?=.*\baudio\b))/
pattern.test('this education media support both audio video streams') // true
/**
 *To add education and educational add .* with education in regex
 * */

kevjose

// to clone one collection to other
db.demo1.find().forEach( function(x){db.demo2.insert(x)} );

// to remove dupliactes based on a key
db.demo1.find({}, {field:1}).sort({_id:1}).forEach(function(doc){
  db.demo1.remove({_id:{$gt:doc._id}, field:doc.field});
})

//to find documents added today
var d = new Date()

kevjose

var startups = [{'score':1},{'score':2},{'score':2},{'score':3},{'score':4}];
startups.sort(function(a, b){
  return (b.score - a.score);
});
for(var i =0, rank= 1, j=1; i <startups.length; i++){
  startups[i].rank = rank;
  if(startups[i+1] && startups[i].score != startups[i+1].score){
    rank = rank+j;
    j++;
  }

kevjose

var reURLInformation = new RegExp([
    '^(https?:)//', // protocol
    '(([^:/?#]*)(?::([0-9]+))?)', // host (hostname and port)
    '(/[^?#]*)', // pathname
    '(\\?[^#]*|)', // search
    '(#.*|)$' // hash
].join(''));
var href ="http://www.example.com";
if(href[href.length -1]!='/')
href = href.concat('/');

kevjose

// Returns the value at a given percentile in a sorted numeric array.
// "Linear interpolation between closest ranks" method
function percentile(arr, p) {
    if (arr.length === 0) return 0;
    if (typeof p !== 'number') throw new TypeError('p must be a number');
    if (p <= 0) return arr[0];
    if (p >= 1) return arr[arr.length - 1];

    var index = arr.length * p,
        lower = Math.floor(index),

kevjose

var matchString = "/ol?link=http://www.facebook.com/flipkart-practo/kevin-kasrt";
var res = matchString.match(/facebook\.com\/(.+)\/+/);
console.log(res[1]);