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tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "[email protected]"

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How to install PhantomJS on Ubuntu

Version: 2.1.1

Platform: x86_64

First, install or update to the latest system software.

sudo apt-get update
sudo apt-get install build-essential chrpath libssl-dev libxft-dev

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/* A function to return class for each Bootstrap navbar elements */
// FIND DESCRIPTION BELOW THE CODE

$(function() {
  $( "#navbar" ).click(function() {
    $( "ul li" ).each(function( index ) {
      var class_name = $( this ).attr("class");
      if( class_name === "active" || class_name === "inactive"){
        console.log( index + ": " + $( this ).attr("class") );
      }

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# Fizz-Buzz Ruby
# FIND DESCRIPTION BELOW THE CODE

puts "Enter a number (integer): "
n = gets.chomp.to_i
i = 1
n.times do
    if i%3 == 0 || i%5 ==0
        if i%3 == 0 && i%5 == 0
            puts "FizzBuzz"

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# Count occurrences
# FIND DESCRIPTION BELOW THE CODE

def  countDuplicates array
  puts array.select{|x| array.count(x) > 1}
            .each_with_object(Hash.new(0)) {|num,counts| counts[num] += 1}
            .each_value.to_a.uniq
end
# Usage 
# countDuplicates([1,3,1,4,5,6,3,2,4,4,6,7,6,7,8,8,9,7,7]);