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Syntax - Syntax sass


Sass merupakan salah satu compiler css yang sangat populer, untuk dapat menggunakan sass sebagai compiler css, kita harus menginstallnya terlebih dahulu, lihat disini.

Berikut beberapa syntax sass dan perbandingannya dengan css biasa,

Parent and child
//sass
.test{
    position: absolute;
    border: 4px solid black;
    top: 200px;
    left: 25%;
    width: 50%;
    height: 200px;
    text-align: center;
    span{
      font-size: 24px;
      line-height: 200px;
    }
}
//css
.test span {
  font-size: 24px;
  line-height: 200px;
}

Use one parameter
//sass
.test {
  font-family: 'Pacifico', cursive;
  height: 400px;
  background-image: url("lemonade.jpg");
  border:{
    top: 4px solid black;
    bottom: 4px solid black;
  }
}
//css
.test {
  font-family: 'Pacifico', cursive;
  height: 400px;
  background-image: url("lemonade.jpg");
  border-top: 4px solid black;
  border-bottom: 4px solid black;
}

Use variable
//sass
$translucent-white:rgba(255,255,255,0.3);
$standard-border: 4px solid black;
.test{
 background-color: $translucent-white;
 border: $standard-border;
}
//css
.test{
 background-color: rgba(255, 255, 255, 0.3);
 border: 4px solid black;
}

Use mixin
//sass
@mixin transform($transformation) {
  transform: $transformation;
  -webkit-transform: $transformation;
  -moz-transform: $transformation;
  -ms-transform: $transformation;
  -o-transform: $transformation;  
}
.test {
 width: 300px;
 height: 180px;
 &:hover{
  @include transform (rotatey(-180deg));  
 } 
}
//css
.test {
  width: 300px;
  height: 180px;
}
.test:hover {
  transform: rotatey(-180deg);
  -webkit-transform: rotatey(-180deg);
  -moz-transform: rotatey(-180deg);
  -ms-transform: rotatey(-180deg);
  -o-transform: rotatey(-180deg);
}

Variable on mixin
//sass
$stripe-properties: to bottom, 15%, blue, white;
@mixin stripes($direction, $width-percent, $stripe-color, $stripe-background: #FFF) {
  background: repeating-linear-gradient(
    $direction,
    $stripe-background,
    $stripe-background ($width-percent - 1),
    $stripe-color 1%,
    $stripe-background $width-percent
  );
}
.test {
 width: 100%;
 height: 100%;
 @include stripes($stripe-properties...);
}
//css
.test {
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(to bottom, white, white 14%, blue 1%, white 15%);
}

Use String
//sass
@mixin photo-content($file) {
  content: url(#{$file}.jpg); //this is ruby???
  object-fit: cover;
}
.image {
    @include photo-content('titanosaur');
    width: 60%;
    margin: 0px auto;  
}
//css
.image {
  width: 60%;
  margin: 0px auto;
  object-fit: cover;
  content: url(titanosaur.jpg);
}

Hover in mixin
//sass
@mixin hover-color($color) {
   &:hover{
       color: $color;
   }
}
.test {
 display: block;
 text-align: center;
 position: relative;
 top: 40%;
 @include hover-color(red);
}    
//css
.test:hover {
  color: red;
}

You can use your math skill
//sass
.test {
  color: red+blue;
}
//css
.math {
  color: magenta; //hahahaha
}

//other math
$width:250px;
.math {
  width: $width;
  border-radius: $width/6;
}
//css
.math{
  width:250px;
  border-radius: 41.66667px;
}

Looping
//use each
$list: (orange, purple, teal);
@each $item in $list { //shit this code same with ruby hahaha,.,.
  .#{$item} {
    background: $item;
  }
}
//css
.orange {
  background: orange;
}
.purple {
  background: purple;
}
.teal {
  background: teal;
}

//use for
$total: 10;
$step: 360deg / $total;
.test {
  height: 30px;
}
@for $i from 1 through $total {
  .test:nth-child(#{$i}) {
    background: adjust-hue(blue, $i * $step);
   }
}
//css
.test {
  height: 30px;
}
.test:nth-child(1) {
  background: #9900ff;
}
.test:nth-child(2) {
  background: #ff00cc;
}
.test:nth-child(3) {
  background: #ff0033;
}
.test:nth-child(4) {
  background: #ff6600;
}
.test:nth-child(5) {
  background: yellow;
}
.test:nth-child(6) {
  background: #66ff00;
}
.test:nth-child(7) {
  background: #00ff33;
}
.test:nth-child(8) {
  background: #00ffcc;
}
.test:nth-child(9) {
  background: #0099ff;
}
.test:nth-child(10) {
  background: blue;
}

Import scss
//import other scss files
@import "test";

//extend
.test{
 position: absolute;
}
.test2 {
    @extend .absolute;
}
//css
.test, .test2, {
  position: absolute;
}

Syntax - Syntax php


Artikel kali ini akan membahas beberapa syntax yang sering digunakan dalam programming PHP.

Tag And comment
===> tag php
<?php ?>

<?php

//===> comment one line
// content comment

//===> comment multi line
/*  
 content comment
 content comment
*/

Display
//===> show string
echo "content string";

//===> show integer
echo 21;

//===> show variabel
echo $variabel;

//===> mix variabel and string
echo "test ".$variabel." test2";

Array
here

Loop
//===> for
for ($i = 2; $i < 11; $i = $i + 2) {
  echo $i;
}
output:
246810

//===> foreach
$sentence = array("Im ", "learning ", "PHP!");        
foreach($sentence as $word) {
  echo $word;
}
output:
Im learning PHP!

//===> while
$loopCond = true;
while ($loopCond){
 echo "<p>The loop is running.<p>";
 $loopCond = false;
}
output:
The loop is running.
//other example
$i=0;
while($i<5){
    echo $i;
    $i++;
}
output:
01234
//with other way
$i=0;
while($i<5):
    echo $i;
    $i++;
endwhile;
output:
01234

//===> do while
$loopCond = false;
do {
 echo "<p>The loop ran even though the loop condition is false.</p>";
} while ($loopCond);
output:
The loop ran even though the loop condition is false.

Library
//===> length
$length = strlen("sayah");
echo $length;
output:
5

//===> partial, uppercase, lowercase
$myname = "Dark King";

$partial = substr($myname, 1, 3);
print $partial;

$uppercase = strtoupper($myname);
print $uppercase;

$lowercase = strtolower($myname);
print $lowercase;

output:
ark
DARK KING
dark king

//===> find position
$myname = "Dark King";
echo strpos($myname, "i");
output:
6

//===> round(pembulatan)
$round = round(M_PI);
print $round;

$round = round(M_PI, 3);
print $round;
output:
3
3.142

//===> rand(random number between)
 print rand(1, 10);

$name = "Dark King";
echo $name[rand(0, strlen($name)-1)];
output:
4
n

//===> length string
$name = "Dark King";
echo strlen($name);
output:
9

Function
//===> play with function
function greetings($name){
    echo "Greetings, " . $name . "!";
}

greetings("Dark King");
output:
Greetings, Dark King!

//===> class
// The code below creates the class
class Person {
    // Creating some properties (variables tied to an object)
    public $isAlive = true;
    public $firstname;
    public $lastname;
    public $age;
    
    // Assigning the values
    public function __construct($firstname, $lastname, $age) {
      $this->firstname = $firstname;
      $this->lastname = $lastname;
      $this->age = $age;
    }
    
    // Creating a method (function tied to an object)
    public function greet() {
      return "Hello, my name is " . $this->firstname . " " . $this->lastname . ". Nice to meet you! :-)";
    }
  }
  
// Creating a new person called "boring 12345", who is 12345 years old ;-)
$me = new Person('Dark', 'King', 12345);

// Printing out, what the greet method returns
echo $me->greet(); 
output:
Hello, my name is Dark King Nice to meet you!

//===> other example class
class Dog{
    public $numLegs = 4;
    public $name;
    
    public function __construct($name){
        $this->name = $name;    
    }
    
    public function bark(){
        return "Woof!";   
    }
    
    public function greet(){
        return "My name is ".$this->name;    
    }
}

$dog1 = new Dog("Barker");
$dog2 = new Dog("Amigo");

echo $dog1->bark();
echo $dog2->greet();
output:
Woof! My name is Amigo

//===> cheking class
class Person {
  public $isAlive = true;
  
  function __construct($name) {
      $this->name = $name;
  }
  
  public function dance() {
    return "I'm dancing!";
  }
}

$me = new Person("Shane");
if (is_a($me, "Person")) {
  echo "I'm a person, ";
}
if (property_exists($me, "name")) {
  echo "I have a name, ";
}
if (method_exists($me, "dance")) {
  echo "and I know how to dance!";
}
output:
I m a person, I have a name, and I know how to dance!

//===> cheking class
class Shape {
  public $hasSides = true;
}
class Square extends Shape {

}
$square = new Square();
if (property_exists($square, 'hasSides')) {
  echo "I have sides!";
}
output:
I have sides!

//===> overide class / extends
class Vehicle {
  public function honk() {
    return "HONK HONK!";
  }
}
class Bicycle extends Vehicle {
   public function honk() {
      return "Beep beep!";   
   }
}
$bicycle = new Bicycle();
echo $bicycle->honk();
output:
Beep beep!

//===> call const
class Ninja extends Person {
  const stealth = "MAXIMUM";
}
echo Ninja::stealth;
output:
MAXIMUM

//===> const
class King {
  public static function proclaim() {
    echo "A kingly proclamation!";
  }
}
King::proclaim()
output:
A kingly proclamation!

How to - Use Charles Proxy (Mobile App)


On the previous trick we have run Charles Proxy on web browser, this time we will join Charles Proxy with your device(mobilephone), for get the url of mobile app.

Ok just following the tutorial,

The first time, you must install Certificates Charles Proxy on your mobilephone, you can download here,

If done, then open that certificates on your mobilephone, so it would appear like this,


Fill the name certificates and "Oke"

Next, set the manual proxy on your mobilephone like this,




Fill the field Proxy with ip on your computer and Port field with your setting on Charles Proxy,



In the picture above, proxy settings done by equating the settings on your computer, where ip computer can be found on Charles Proxy




or command prompt (type ipconfig on command prompt see on IPv4 address)


Whereas port proxy, you can set port proxy on your Charles Proxy like this,
Just click menu Proxy and click Proxy Settings


And then set the Port,



The last, run Charles Proxy and then open one of your app on mobile phone, so that the view on Charles Proxy will look like this,



===DONE!===

How to - Use Charles Proxy (Web Browser)


Welcome back,,

This time, i will give you some trick about networking,

In the development a website we often hear about get and post method, and because of that method a website can work properly,

In this tutorial i want to tell you how to know what the post or get method that used in a website?
what variabel are given from a get method? and what variable are use for post method?

With server proxy, we will know that all.. ha..ha..ha..(don't laugh like me!)

Ok, the first time that we must to do is,,
install the Charles Proxy,
and to do that you must install java first.



if you have done all so you can running that software like this ha..ha..ha..(don't laugh like me!)



second, checked Windows Proxy, like this..



And try to running Charles Proxy(Press the button), then open your browser and type anything url you want and you will see this!



You see that?!!! i get that get and post method of this website! ha..ha..ha..(don't laugh like me!)

So easy, yes! because this website not require https link, and what about the https link?
simple, just install SSL Certificates of Server Proxy to your browser like this,


Open and intsall,,

Download SSL Certificates Charles Proxy, Java, and Charles Proxy, here..

Oke, but what about a mobile app? how i can get the post and get method?
see here..

===DONE!===

Engine - Create graph or chart


Hello everyone,,

Tutorial kali ini codedoct akan membagikan cara membuat grafik / chart menggunakan highcharts pada php.

Grafik atau chart ini sangat berguna pada pada setiap perusahaan untuk menampilkan data statistik dari pertumbuhan database suatu perusahaan.

Oke langsung saja kita buat grafik / chart nya,

Berikut codenya,
<?php
 //you can change this data with your database
 $datas = array(
  array(
   'gender' => 'Laki-laki',
   'jumlah' => '123'
  ),
  array(
   'gender' => 'Perempuan',
   'jumlah' => '321'
  )
 );
?>
<html>
 <head>
  <title>Grafik | Chart</title>
  <script type="text/javascript" src="extension/jquery.min.js"></script>
  <script type="text/javascript" src="extension/highcharts.js"></script>
  <script type="text/javascript">
   $(function(){
     showChart();
   });

   function showChart()
   {
     var chart1; // globally available
     $(document).ready(function() {
       chart1 = new Highcharts.Chart({
          chart: {
             renderTo: 'chart',
             type: 'column'
          },   
          title: {
             text: 'Grafik Jumlah Penduduk'
          },
          xAxis: {
             categories: ['Gender']
          },
          yAxis: {
             title: {
                text: 'Jumlah Penduduk'
             }
          },
               series:             
             [
              //i'am use data array
               <?php foreach ($datas as $data) { ?>
        {
          name: '<?=$data['gender']?>',
          data: [<?=$data['jumlah']?>]
        },
      <?php } ?>
             ]
       });
     });
   }
  </script>
 </head>
 <body>
  <button onclick="showChart(this)" type="button">test</button>
  <div id="chart"></div>
 </body>
</html>

Dan hasilnya akan tampak seperti ini,


Jika butuh file extensionnya silahkan download langsung full codenya disini,

===DONE!===

Review - Custom server VS serverpilot


Hello everyone,

Kali ini codedoct akan mencoba sebuah experiment untuk membandingkan sebuah server yang dibuat dengan custom/manual konfigurasi dan server yang dibuat dan dimaintenance dengan menggunakan serverpilot.

Serverpilot merupakan sebuah aplikasi atau engine yang dibuat untuk mempermudah seorang developer dalam membuat, menjalankan, dan maintenance websitenya pada sebuah server.

Bagi anda yang tidak terlalu paham dengan OS server seperti Ubuntu, centOS dan sejenisnya, serverpilot tentu sangat membantu dalam hal mengkonfigurasi webserver anda, karena dengan serverpilot anda tidak perlu lagi mengkonfigurasi apapun seperti install php, enable site, konfigurasi HOST, dan lain-lain pada server, karena serverpilot sudah mengatur semuanya untuk anda.

Dengan konfigurasi yang serba otomatis lalu bagaimana dengan performa server yang diinstall dengan menggunakan serverpilot ini?

Berikut ringkasannya,





Dari data-data tersebut dapat kita lihat bahwa performa server yang dikonfigurasi dengan serverpilot cukup bagus dan tidak kalah dibandingkan dengan konfigurasi manual, tapi ada beberapa konfigurasi yang dapat kita lakukan dengan mudah pada server custom, tapi sangat sulit jika dikonfigurasikan pada serverpilot. Dan satu hal lagi, serverpilot ini tidak gratis hehehe..

===DONE!!!===

Visual Basic - Membuat sistem (CRUD) Update dan Delete


Melanjutkan tutorial sebelumnya, tutorial kali ini kita akan melengkapi project kita sebelumnya dengan sistem CRUD yang lebih sempurna,

Pada tutorial kali ini kita akan melengkapi project sebelumnya dengan navigasi yang digunakan untuk mengupdate dan mendelete field database.

Oke langsung saja kita praktekan tutorialnya,

Pertama, tambahkan beberapa button baru sehingga tampak seperti ini,


Selanjutnya klik 2x button Prev dan isikan code berikut,
DataUserBindingSource.MovePrevious()

Kemudian klik 2x button Next dan isikan code berikut,
DataUserBindingSource.MoveNext()

Setelah itu klik 2x button Delete dan isikan code berikut,
DataUserBindingSource.RemoveCurrent()

Terakhir klik 2x button Close dan isikan code berikut,
Me.Close()

Full codenya terlihat seperti ini,
Public Class Form1

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the 'Project_CRUDDataSet1.DataUser' table. You can move, or remove it, as needed.
        Me.DataUserTableAdapter.Fill(Me.Project_CRUDDataSet1.DataUser)
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        DataUserBindingSource.AddNew()
    End Sub

    Private Sub save_Click(sender As Object, e As EventArgs) Handles save.Click
        On Error GoTo SaveErr
        DataUserBindingSource.EndEdit()
        DataUserTableAdapter.Update(Project_CRUDDataSet1.DataUser)
        MessageBox.Show("Data was saved")
SaveErr:
        Exit Sub
    End Sub

    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
        DataUserBindingSource.MovePrevious()
    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        DataUserBindingSource.MoveNext()
    End Sub

    Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
        DataUserBindingSource.RemoveCurrent()
    End Sub

    Private Sub Button5_Click(sender As Object, e As EventArgs) Handles Button5.Click
        Me.Close()
    End Sub
End Class

Saat di "Run" tampilannya akan tampak seperti ini,



===DONE!===

Syntax - Syntax ruby


Sebelum kita masuk ke tutorial ruby on rails ada baiknya kita mengenal terlebih dahulu beberapa syntax dari ruby,

Berikut beberapa syntax ruby yang sudah codedoct rangkum

Simple Ruby
====> comment one line
#content comment

====> comment many line
=begin
content comment
=end

====> input text
gets.chomp

====> write text
print

====> write text with new line
puts

====> aritmatika
i = 2
kuadrat: i ** 2
tambah: i + 1
kurang: i - 1
bagi: i / 2 # other way: i.fdiv(2)
hasil bagi: i % 2 # output is 0

====> write variabel
v = "test"
puts "value v : "+v

====> write variabel with on string
v = "test"
puts "value v : #{v}"

caption = "A giraffe surrounded by "
caption << "weezards!"
output:
"A giraffe surrounded by weezards!"

====> many way to code
age = 26
"I am " + age.to_s + " years old."
#==> "I am 26 years old."
"I am " << age.to_s << " years old."
#==> "I am 26 years old."
"I am #{age} years old."
#==> I am 26 years old.

Looping
====> each array
v = [1, 2, 3]
v.each {|x| puts x}

====> each array with other way
v = [1, 2, 3]
v.each do |x| 
  puts x
end

====> while
i = 0
while i<=20 do
 puts i
 i += 1
end

====> repeat until
i = 0
until i==20 do
 puts i
 i += 1
end

====> for
for i in 0..20
 puts i
end

====> times
i = 0
20.times do
 puts i
 i += 1 #it same about i = i+1
end

====> loop
i = 20
loop do
  i -= 1
  next if i>=19 
  puts "#{i}"
  break if i <= 0
end

Array
====> in ruby array can write with hash syntax
php: x = array();
 or just x = [];
ruby x = Hash.new() #remember Hash write with capitalize!
 or just x = Hash.new
 or just x = {}

====> array with key
x = {
 "red" => "merah"
 "green" => "hijau"
 "black" => "hitam"
}

====> array multidimensional
x = [[1, 2, 3], ["iam", "dark", "king"]]

====> write array multidimensional
x.each {|n,v| puts "number: "+n+" value: #{v}\n"}

====> write just one value array
x = ["red", "green", "black"]
puts x[1] #will display green

====> write just one key of array multidimensional
x = {
 "red" => "merah"
 "green" => "hijau"
 "black" => "hitam"
}
puts x[red]

====> write all value of array multidimensional
x = {
 "red" => "merah"
 "green" => "hijau"
 "black" => "hitam"
}
x.each do |eng,ina|
 puts ina
end

====> sort array integer
x = [1, 4, 5, 3, 2]
x.sort! # will display [1, 2, 3, 4, 5]

====> sort array string
x = ["a", "c", "b", "d", "e"]
x.sort! # will display ["a", "b", "c", "d", "e"]

====> sort with other way
books = ["Charlie and the Chocolate Factory", "War and Peace", "Utopia", "A Brief History of Time", "A Wrinkle in Time"]
books.sort! { |firstBook, secondBook| firstBook <=> secondBook }
books.sort! {|firstBook, secondBook| secondBook <=> firstBook}

====> sorting array with simple way
def alphabetize(arr, rev=false)
    arr.sort!
    if rev
        arr.reverse!
    end
    return arr
end
numbers = [5, 1, 3, 8]
puts alphabetize(numbers)

====> array with semi colon
menagerie = { :foxes => 2,
  :giraffe => 1,
  :weezards => 17,
  :elves => 1,
  :canaries => 4,
  :ham => 1
}
output: {:foxes=>2, :giraffe=>1, :weezards=>17, :elves=>1, :canaries=>4, :ham=>1}

====> push array with push
strings = ["HTML", "CSS", "JavaScript", "Python", "Ruby"]
symbols = []
strings.each do |s|
    s = s.to_sym
    symbols.push(s)
end
easy way with this:
alphabet = ["a", "b", "c"]
alphabet << "d"
output:
["a", "b", "c", "d"]

====> push array multidimensional
movies = {
    "warkop" => "4",
    "deadpool" => "4"
}
puts "what is movie title?"
title = gets.chomp
puts "how about the rating?"
rating = gets.chomp
movies[title] = rating
output:
{"warkop"=>"4", "deadpool"=>"4"}
what is movie title?
 jumanji
how about the rating?
 3
movie was added!
{"warkop"=>"4", "deadpool"=>"4", "jumanji"=>"3"}

Symbol
====> symbol not use string
movies = {
    :warkop => "comedy",
    :jumanji => "advanture"
}

====> other way write symbol
movies = {
    warkop: "comedy",
    jumanji: "advanture"
}

====> how fast symbol
require 'benchmark'
string_AZ = Hash[("a".."z").to_a.zip((1..26).to_a)]
symbol_AZ = Hash[(:a..:z).to_a.zip((1..26).to_a)]

====> select the symbols
movie_ratings = {
  memento: 3,
  primer: 3.5,
  the_matrix: 5,
  truman_show: 4,
  red_dawn: 1.5,
  skyfall: 4,
  alex_cross: 2,
  uhf: 1,
  lion_king: 3.5
}
good_movies = movie_ratings.select{|m,r| r > 3}
puts good_movies

====> write just key other way
movie_ratings = {
  memento: 3,
  primer: 3.5,
  the_matrix: 3,
  truman_show: 4,
  red_dawn: 1.5,
  skyfall: 4,
  alex_cross: 2,
  uhf: 1,
  lion_king: 3.5
}
movie_ratings.each {|m,r| puts m}

Condition
====> use unless for false
ruby_is_ugly = false

unless ruby_is_ugly
 puts "Ruby's not ugly!"
end

====> this is ruby
ruby_is_eloquent = true
ruby_is_ugly = false
puts "Ruby is eloquent!" if ruby_is_eloquent
puts "Ruby's not ugly!" unless ruby_is_ugly

====> Ternary
puts 1>0 ? "benar":"salah" #this is same with php he..he..he..

====> Case
puts "Hello there!"
greeting = gets.chomp
case greeting
    when "english" then puts "Hello!"
    when "french" then puts "Bonjour!"
    when "german" then puts "Guten Tag!"   
    when "finnish" then puts "Haloo!"
    else puts "I don't know that language!"
end

====> Case another way
puts "Hello there!"
greeting = gets.chomp
case greeting
    when "english"
      puts "Hello!"
    when "french"
      puts "Bonjour!"
    when "german"
      puts "Guten Tag!"   
    when "finnish"
      puts "Haloo!"
    else puts "I don't know that language!"
end

====> set value that nill
favorite_book = nil
puts favorite_book
favorite_book ||= "Cat's Cradle"
puts favorite_book
favorite_book ||= "Why's (Poignant) Guide to Ruby"
puts favorite_book
favorite_book = "Why's (Poignant) Guide to Ruby"
puts favorite_book
output:
Cat's Cradle
Cat's Cradle
Why's (Poignant) Guide to Ruby'

====> write code that divisible of 2
my_array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
my_array.each {|x| puts x if x % 2 == 0  }
output: 2
4
6
8
10

====> use upto
"L".upto("P") {|x| puts x }
output:
L
M
N
O
P
test

====> Play with array(CRUD array)
movies = {
    "warkop" => "4",
    "deadpool" => "4"
}

puts "what do you want your movie"
choice = gets.chomp

case choice
    when "add"
        puts movies
        puts "what is movie title?"
        title = gets.chomp
        if movies[title].nil?
            puts "how about the rating?"
            rating = gets.chomp
            movies[title.to_sym] = rating.to_i
            puts "movie was added!"
            puts movies
        else
            puts "that the movie already exists"
        end
    when "update"
        puts movies
        puts "What movie that you want to update rating?"
        title = gets.chomp
        if movies[title].nil?
            puts "Your movie not found!"
        else
            puts "Set the rating movie"
            rating = gets.chomp
            movies[title] = rating.to_i
            puts "rating was update!"
            puts movies
        end
    when "display"
        movies.each do |m,r|
            puts "#{m}: #{r}"
        end
    when "delete"
        puts movies
        puts "Type movie that you want to delete?"
        title = gets.chomp
        if movies[title].nil?
            puts "Movie not found!"
        else
            movies.delete(title)
            puts "That movie was deleted"
            puts movies
        end
    else puts "Error!"
end

Library
====> collect 
my_nums = [1, 2, 3]
my_nums.collect { |num| num ** 2 }
output:
[1, 4, 9]
=begin
This is because .collect returns a copy of my_nums,
but doesn't change (or mutate) the original my_nums array. 
If we want to do that, we can use .collect!
=end
my_nums.collect! { |num| num ** 2 }
=begin
Recall that the ! in Ruby means "this method could do something dangerous or unexpected!"
In this case, it mutates the original array instead of creating a new one.
=end

====> example collect
fibs = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
print "#{fibs}\n"
doubled_fibs = fibs.collect {|x| x**2}
print "#{fibs}\n"
print doubled_fibs
output:
[1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
[1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
[1, 1, 4, 9, 25, 64, 169, 441, 1156, 3025]
print "#{fibs}\n"
doubled_fibs = fibs.collect! {|x| x**2}
print "#{fibs}\n"
print doubled_fibs
output:
[1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
[1, 1, 4, 9, 25, 64, 169, 441, 1156, 3025]
[1, 1, 4, 9, 25, 64, 169, 441, 1156, 3025]

====> yield
def double(param)
    puts "yeehhaaaa"
    yield(param)
    puts "end"
end

double(2) {|x|puts x*2}
output:
yeehhaaaa
4
end

====> Proc
multiples_of_3 = Proc.new do |n|
  n % 3 == 0
end
(1..100).to_a.select(&multiples_of_3)
output:
[3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, 96, 99] 

====> Proc with call
hi = Proc.new do
    puts "Hello!"
end
hi.call
output:
Hello!

====> floor
floats = [1.2, 3.45, 0.91, 7.727, 11.42, 482.911]

round_down = Proc.new do |x|
    x.floor
end

ints = floats.collect(&round_down)
output:
[1, 3, 0, 7, 11, 482]

====> symbols meet 
Procnumbers_array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
strings_array = numbers_array.map(&:to_s)
output:
["1", "2", "3", "4", "5", "6", "7", "8", "9", "10"]

====> lambda
def lambda_demo(a_lambda)
  puts "I'm the method!"
  a_lambda.call
end
lambda_demo(lambda { puts "I'm the lambda!" })
output:
I'm the method!
I'm the lambda!

====> wonderfull lambda
strings = ["leonardo", "donatello", "raphael", "michaelangelo"]
symbolize = lambda {|x| x.to_sym}
symbols = strings.collect(&symbolize)
output:
[:leonardo, :donatello, :raphael, :michaelangelo]

====> different proc and lambda?
def batman_ironman_proc
  darkking = Proc.new { return "Batman will win!" }
  darkking.call
  "Iron Man will win!"
end

puts batman_ironman_proc

def batman_ironman_lambda
  darkking = lambda { return "Batman will win!" }
  darkking.call
  "Iron Man will win!"
end

puts batman_ironman_lambda

output:
Batman will win! #this is pro
Iron Man will win! #this is lambda

====> filter with array
my_array = ["raindrops", :kettles, "whiskers", :mittens, :packages]
symbol_filter = lambda {|x| x.is_a? Symbol}
symbols = my_array.select(&symbol_filter)
output:
[:kettles, :mittens, :packages] 

Method
====> method
def name_method
  content_method
end

====> method with return boolean
def is_true?
  content_method
end

====> method with parameter
def welcome(name)
  return "Hello #{name}"
end
welcome("Dark King")

====> to string, float, integer, simbol
i = 2
i.to_s
i.to_f
i.to_i
i.to_sym

====> sorting array with method
def alphabetize(arr, rev=false)
  if rev
    arr.sort { |item1, item2| item2 <=> item1 }
  else
    arr.sort { |item1, item2| item1 <=> item2 }
  end
end
books = ["Heart of Darkness", "Code Complete", "The Lorax", "The Prophet", "Absalom, Absalom!"]
puts "A-Z: #{alphabetize(books)}"
puts "Z-A: #{alphabetize(books, true)}"

====> the function semicolon
puts "string".object_id
puts "string".object_id
puts :symbol.object_id
puts :symbol.object_id
output:
15100680
15100480
319848
319848

string_time = Benchmark.realtime do
  100_000.times { string_AZ["r"] }
end
symbol_time = Benchmark.realtime do
  100_000.times { symbol_AZ[:r] }
end
puts "String time: #{string_time} seconds."
puts "Symbol time: #{symbol_time} seconds."

====> class
class Computer
  $manufacturer = "Mango Computer, Inc."
  @@files = {hello: "Hello, world!"}
  def initialize(username, password)
    @username = username
    @password = password
  end
  def current_user
    @username
  end
  def self.display_files
    @@files
  end
end

# Make a new Computer instance:
hal = Computer.new("Dave", 12345)
puts "Current user: #{hal.current_user}"
# @username belongs to the hal instance.
puts "Manufacturer: #{$manufacturer}"
# $manufacturer is global! We can get it directly.
puts "Files: #{Computer.display_files}"
# @@files belongs to the Computer class.
output:
Current user: Dave
Manufacturer: Mango Computer, Inc.
Files: {:hello=>"Hello, world!"}

====> you can do thisclass ApplicationError
  def display_error
    puts "Error! Error!"
  end
end
class SuperBadError < ApplicationError
end
err = SuperBadError.new
err.display_error
output:
Error! Error!

====> Override class
class Creature
  def initialize(name)
    @name = name
  end
  def fight
    return "Punch to the chops!"
  end
end
class Dragon < Creature
   def fight
       return "Breathes fire!"
   end
end
show = Dragon.new
puts show.fight
output:
Breathes fire!

====> OOP
class Account
    attr_reader :name, :balance
    def initialize(name,balance=100)
        @name = name
        @balance = balance
    end
    private 
    def pin
        @pin = 1234
    end
    def pin_error
        return "Access denied: incorrect PIN."
    end
    public
    def display_balance(pin_number)
        if pin_number == pin
            puts "Balance: $#{@balance}."
        else
            pin_error
        end
    end
    def withdraw(pin_number,amount)
        if pin_number == pin
            puts "Withdrew #{amount}. New balance: $#{@balance}."
        else
            pin_error
        end
    end
end
checking_account = Account.new("Conteriano",10_000_000)
puts checking_account.display_balance(4321)
puts checking_account.display_balance(1234)
puts checking_account.withdraw(4321,10001)
puts checking_account.withdraw(1234,10001)
output:
Access denied: incorrect PIN.
Balance: $10000000.
Access denied: incorrect PIN.
Withdrew 10001. New balance: $10000000.

===DONE!!!===

Visual Basic - Membuat sistem (CRUD) Create dan Read


Pada tutorial sebelumnya kita sudah membuat sebuat koneksi database pada project visual studio kita, tutorial kali ini akan mempraktekkan cara membuat operation database untuk "create new data",

Oke langsung saja kita mulai,

Pertama, buka kembali file project kita sebelumnya, dengan tampilan seperti ini,


Klik dua kali button New dan ketikan code berikut,
DataUserBindingSource.AddNew()
Perhatikan pada code diatas code DataUserBindingSource merupakan nama database yang dibuat sehingga sesuaikan dengan nama database yang anda buat, kita bisa melihat nama bindingnya pada tanda kuning gambar diatas,,

Kemudian klik dua kali button Save dan ketikkan code berikut,
On Error GoTo SaveErr
        DataUserBindingSource.EndEdit()
        DataUserTableAdapter.Update(Project_CRUDDataSet.DataUser)
        MessageBox.Show("Data was saved")
SaveErr:
        Exit Sub
Sesuaikan Dataset, Binding, dan TableAdapter sesuai dengan yang anda miliki dapat dilihat pada tanda kuning pada gambar diatas,,

Sehingga tampilan keseluruhan code akan tampak seperti ini,
Public Class Form1

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the 'Project_CRUDDataSet.DataUser' table. You can move, or remove it, as needed.
        Me.DataUserTableAdapter.Fill(Me.Project_CRUDDataSet.DataUser)

    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        DataUserBindingSource.AddNew()
    End Sub

    Private Sub save_Click(sender As Object, e As EventArgs) Handles save.Click
        On Error GoTo SaveErr
        DataUserBindingSource.EndEdit()
        DataUserTableAdapter.Update(Project_CRUDDataSet.DataUser)
        MessageBox.Show("Data was saved")
SaveErr:
        Exit Sub
    End Sub
End Class

Dan tampilanya akan tampak seperti ini jika di "run"


===DONE!===

Visual Basic - Koneksi database


Hello everyone, senang bisa kembali coding visual basic,,

Kemarin kita sudah membuat sebuah operation file pada file txt, tutorial kali ini akan mempraktekkan cara membuat sebuah koneksi database pada Visual Studio 2013 dengan tipe database Microsoft Access.

Ada banyak tipe database yang bisa digunakan pada Visual Basic tapi untuk kali ini kita akan menggunakan Microsoft Access.

Oke, langsung saja kita mulai tutorialnya.

Pertama buat file Access terlebih dahulu seperti ini.
Pilih blank database dan create


Kemudian akan muncul halaman database anda yang baru dibuat, klik kanan pada table1 dan pilih Design View masukkan nama tabel dan ok.



Selanjutnya masukan nama kolom dan tipe seperti pada gambar berikut.


Dan terakhir save.
Kita sudah selesai membuat file database yang akan kita gunakan pada visual studio, Selanjutnya buat project visual studio baru dan masukkan file database yang baru dibuat tadi satu folder bersama folder project visual studio kita (jika tidak mengerti silahkan pelajari tutorial sebelumnya pada submenu visual studio).

Buat design form visual studio seperti ini.


Untuk membuat GroupBox2 gunakan tool DataGridView,


Dan tampilannya akan tampak seperti ini, jika database belum terkoneksi maka tampilannya akan blank seperti ini.


Klik tombol berwarna kuning dan pilih Add Project Data Source,


Kemudian akan muncul tampilan seperti ini,


Tinggal next saja kemudian pilih Dataset dan next lagi setelah itu akan muncul tampilan berikut,


Data source pilih microsoft access database, kemudian browse database yang baru kita buat tadi dan klik Test Connection, jika error karena database tidak support, maka buka kembali file database access dan save as sebagai file access 2002-2003, coba lagi test connection muncul tampilan berikut,


Klik ok dan klik next kemudian pilih no saja,


Klik next lagi, centang tables dan view dan klik finish. Sehingga tampilan DataGridView akan tampak seperti table yang sudah kita buat pada microsoft access,
Selanjutnya Sinkronisasikan tiap kolomnya dengan form yang ada, caranya klik salah satu text box misalkan text box address kemudian pada properties databindings masukan parameter text sesuai dengan nama kolomnya(misal form address maka databindingsnya adalah kolom address) seperti ini,



Sehingga akan seperti ini hasilnya,


Untuk mengedit tampilan pada DataGridView klik kembali tanda kuning berikut,


Dan klik Edit Columns seperti berikut, buat kolom ID tidak terlihat,


Sekarang "run" dan tampilanya akan tampak seperti ini,


===DONE!===