Hi All,
These are all some programs solution of Ruby forum asked questions by Users. i replied them and also want to share here…
Code 1 :
def run
arr=[“Raveendran”,”jazzezravi”,”jazzez”,”ravi”,”jazzezravendran”]
ram(arr)
end
def ram(arr)
arra=arr
like = [” good boy”, ” bad boy”,” nice boy”,” Gentle man”]
puts arra[rand(5)] + like[rand(4)]
end
def raja(arr)
j=0
arr=[“Arun”,”Babu”,”Chitra”,”David”,”Einstein”]
while j<4 do
puts arr[j]
j+=1
end
end
5.times { run; sleep(2)}
Output:
ravi good boy
ravi good boy
jazzezravi bad boy
ravi Gentle man
jazzezravi Gentle man
————————————————————————–
Code 2:
class Bird
def preen
puts “I am cleaning my feathers.”
end
def fly
puts “I am flying.”
end
end
class Penguin<Bird
def fly
fail “Sorry. I’d rather swim.”
end
end
p=Penguin.new
puts p.preen
puts p.fly
Output:
inher2method.rb:12:in `fly’: Sorry. I’d rather swim. (RuntimeError)
from inher2method.rb:18
I am cleaning my feathers.
nil
————————————————————————
Code 3:
# ansi_colors.rb
#
# Created by James Edward Gray II on 2005-05-03.
# Copyright 2005 Gray Productions. All rights reserved.
require “rubygems”
require “highline/import”
# Supported color sequences.
colors = %w{black red green yellow blue magenta cyan white}
# Using color() with symbols.
colors.each_with_index do |c, i|
say(“This should be <%= color(‘#{c}’, :#{c}) %>!”)
if i == 0
say( “This should be ” +
“<%= color(‘white on #{c}’, :white, :on_#{c}) %>!”)
else
say( “This should be ” +
“<%= color( ‘#{colors[i – 1]} on #{c}’,
:#{colors[i – 1]}, :on_#{c} ) %>!”)
end
end
# Using color with constants.
say(“This should be <%= color(‘bold’, BOLD) %>!”)
say(“This should be <%= color(‘underlined’, UNDERLINE) %>!”)
# Using constants only.
say(“This might even <%= BLINK %>blink<%= CLEAR %>!”)
# It even works with list wrapping.
erb_digits = %w{Zero One Two Three Four} +
[“<%= color(‘Five’, :blue) %%>”] +
%w{Six Seven Eight Nine}
say(“<%= list(#{erb_digits.inspect}, :columns_down, 3) %>”)
Output:
This should be [30mblack[0m!
This should be [37m[40mwhite on black[0m!
This should be [31mred[0m!
This should be [30m[41mblack on red[0m!
This should be [32mgreen[0m!
This should be [31m[42mred on green[0m!
This should be [33myellow[0m!
This should be [32m[43mgreen on yellow[0m!
This should be [34mblue[0m!
This should be [33m[44myellow on blue[0m!
This should be [35mmagenta[0m!
This should be [34m[45mblue on magenta[0m!
This should be [36mcyan[0m!
This should be [35m[46mmagenta on cyan[0m!
This should be [37mwhite[0m!
This should be [36m[47mcyan on white[0m!
This should be [1mbold[0m!
This should be [4munderlined[0m!
This might even [5mblink[0m!
Zero Four Eight
One [34mFive[0m Nine
Two Six
Three Seven
————————————————————————
Code 4:
require ‘win32ole’
fso = WIN32OLE.new(‘Scripting.FileSystemObject’)
folder = fso.GetFolder(‘C:\Documents and Settings\raveendran\My Documents\My Pictures\Trubee’)
puts folder.name
puts folder.size
puts folder.path
Output:
Trubee
14948754
C:\Documents and Settings\raveendran\My Documents\My Pictures\Trubee
—————————————————————————–
High line Example Code 5:
require “highline/import”
zipcode = ask(“Zip? “) { |zip| zip.validate = /\A\d{5}(?:-?\d{4})?\Z/ }
Output:
Zip? hiuhi8
Your answer isn’t valid (must match /\A\d{5}(?:-?\d{4})?\Z/).
? ttrtrt
Your answer isn’t valid (must match /\A\d{5}(?:-?\d{4})?\Z/).
? 90204
—————————————————————————
HighLine Example Code 6:
#!/usr/local/bin/ruby -w
require “rubygems”
require “highline/import”
# The old way, using ask() and say()…
choices = %w{ruby python perl}
say(“This is the old way using ask() and say()…”)
say(“Please choose your favorite programming language:”)
say(choices.map { |c| ” #{c}\n” }.join)
case ask(“? “, choices)
when “ruby”
say(“Good choice!”)
else
say(“Not from around here, are you?”)
end
# The new and improved choose()…
say(“\nThis is the new mode (default)…”)
choose do |menu|
menu.prompt = “Please choose your favorite programming language? ”
menu.choice :ruby do say(“Good choice!”) end
menu.choices(:python, :perl) do say(“Not from around here, are you?”) end
end
say(“\nThis is letter indexing…”)
choose do |menu|
menu.index = :letter
menu.index_suffix = “) ”
menu.prompt = “Please choose your favorite programming language? ”
menu.choice :ruby do say(“Good choice!”) end
menu.choices(:python, :perl) do say(“Not from around here, are you?”) end
end
say(“\nThis is with a different layout…”)
choose do |menu|
menu.layout = :one_line
menu.header = “Languages”
menu.prompt = “Favorite? ”
menu.choice :ruby do say(“Good choice!”) end
menu.choices(:python, :perl) do say(“Not from around here, are you?”) end
end
say(“\nYou can even build shells…”)
loop do
choose do |menu|
menu.layout = :menu_only
menu.shell = true
menu.choice(:load, “Load a file.”) do |command, details|
say(“Loading file with options: #{details}…”)
end
menu.choice(:save, “Save a file.”) do |command, details|
say(“Saving file with options: #{details}…”)
end
menu.choice(:quit, “Exit program.”) { exit }
end
end
Output:
This is the old way using ask() and say()…
Please choose your favorite programming language:
ruby
python
perl
? ruby
You must choose one of [“ruby”, “python”, “perl”].
? runy
You must choose one of [“ruby”, “python”, “perl”].
? 1
You must choose one of [“ruby”, “python”, “perl”].
? perl
Not from around here, are you?
This is the new mode (default)…
1. ruby
2. python
3. perl
Please choose your favorite programming language? 1
Good choice!
This is letter indexing…
a) ruby
b) python
c) perl
Please choose your favorite programming language? ruby
You must choose one of [“a”, “b”, “c”, :ruby, :python, :perl].
? a
Good choice!
This is with a different layout…
Languages: Favorite? (ruby, python or perl) ruby
Good choice!
You can even build shells…
load, save, quit or help? q
—————————————————————————
Transpose Code 7:
arr = [“abc”, [“def1”, “def2”, “def3”]]
arr_final=[]
arr[0] = [arr[0]] * arr[1].size
p arr.transpose
Output:
[[“abc”, “def1”], [“abc”, “def2”], [“abc”, “def3”]]
———————————————————————–
Astrlrologicel help Code 8:
class Reservoir
def main
puts “Please Enter the name”
b=gets()
a=b.downcase
puts a
val={“a”=>1,”j”=>1,”s”=>1,
“b”=>2,”k”=>2,”t”=>2,
“c”=>3,”l”=>3,”u”=>3,
“d”=>4,”m”=>4,”v”=>4,
“e”=>5,”n”=>5,”w”=>5,
“f”=>6,”o”=>6,”x”=>6,
“g”=>7,”p”=>7,”y”=>7,
“h”=>8,”q”=>8,”z”=>8,
“i”=>9,”r”=>9}
num=[]
i=0
#puts a
while i < a.length do
num << val[a[i,1]]
i+=1
end
mind(num)
end
def mind(num)
no=[]
no=num
j=0
final=0
while j < no.length
final +=num[j].to_i
j+=1
end
output= final.to_s
if output.length !=1
output2=output.split(//)
mind(output2)
else
puts final
end
end
end
res=Reservoir.new
res.main
Output:
Please Enter the name
raveendran
3 # This number will give some astrological theories.
————————————————————————
MYSQL Code 9:
require ‘mysql’
my_array= [“google.com”,”yahoo.com”]
db = Mysql::new(“localhost”, “root”, “”, “new_development”)
my_array.each do |a|
puts a
b = a.collect{|x| x = “‘” + x + “‘”}
puts b
c = b.join(“,”)
puts c
sql = “INSERT INTO sites VALUES (3,#{c},0,0);”
db.query(sql)
end
——————————————————————
Big Decimal Code 10:
require ‘bigdecimal’
x = BigDecimal(“123.6”) – BigDecimal(“123”)
puts x.to_f
puts f=123.6 – 123
Output:
0.6
0.599999999999994
——————————————————————-
File Stat Code 11:
puts a= File.stat(“hi.txt”).uid
puts a= File.stat(“hi.txt”).nlink
Output:
0
1
——————————————————————
HTML Tag Helper Code 12:
source=File.open(“wordpress.txt”)
search=[“<html”,”</html>”,”<head”,”</head>”,”<body”,”</body>”,”<table”,”</table>”,”<tr”,”</tr>”,”<td”,”</td>”,
“<th”,”</th>”,”<p”,”</p>”,”<div”,”</div>”,”<span”,”</span>”,
“<script”,”</script>”,”<ul”,”</ul>”,”<li”,”</li>”,”<ol”,”</ol>”,”<a”,”</a>”,”<h1″,”</h1>”,”<h2″,”</h2>”,
“<h3″,”</h3>”,”<h4″,”</h4>”,”<h5″,”</h5>”,”<h6″,”</h6>”,”<font”,”</font>”]
tag=[]
source.each do |line|
i=0
while i < search.length do
taghelp = line.downcase.match(search[i]).to_s
tag << taghelp unless taghelp.empty?
i+=1
end
end
j=0
while j< search.length do
count= tag.grep(search[j])
puts count.length.to_s + search[j].to_s + ” tag”
j+=1
end
WordPress.txt File has –> View source code of the testing web page
Output:
1<html tag
1</html> tag
1<head tag
1</head> tag
1<body tag
1</body> tag
0<table tag
0</table> tag
0<tr tag
0</tr> tag
0<td tag
0</td> tag
0<th tag
0</th> tag
0<p tag
0</p> tag
117<div tag
117</div> tag
30<span tag
30</span> tag
14<script tag
14</script> tag
0<ul tag
0</ul> tag
2<li tag
0</li> tag
0<ol tag
0</ol> tag
17<a tag
17</a> tag
12<h1 tag
12</h1> tag
0<h2 tag
0</h2> tag
0<h3 tag
0</h3> tag
0<h4 tag
0</h4> tag
0<h5 tag
0</h5> tag
0<h6 tag
0</h6> tag
0<font tag
0</font> tag
—————————————————————-
Infinite Loop Code 13:
class X
def m; “m”; end
end
class Y < X
def self.method_added(sym)
puts sym
#return if /^__/ === sym.to_s
alias_method(“__#{sym}”, sym)
remove_method(sym)
end
def m; m; end
end
#class Y
#def m; m; end
#end
Y.new
Output:
m
__m
____m
______m
________m
__________m
____________m
______________m
________________m
__________________m
—————————————————————————
Next 30 days List Code 14:
date= Date.today
enddate=date + 30
weekday=[0,1,2,3,4,5,6]
while enddate > date
puts date.to_s+” sunday” if date.wday==0
puts date.to_s+” monday” if date.wday==1
puts date.to_s+” tuesday” if date.wday==2
puts date.to_s+” Wednesday” if date.wday==3
puts date.to_s+” thursday” if date.wday==4
puts date.to_s+” friday” if date.wday==5
puts date.to_s+” saturday” if date.wday==6
date+=1
end
Output:
2008-08-08 friday
2008-08-09 saturday
2008-08-10 sunday
2008-08-11 monday
2008-08-12 tuesday
2008-08-13 Wednesday
2008-08-14 thursday
2008-08-15 friday
2008-08-16 saturday
2008-08-17 sunday
2008-08-18 monday
2008-08-19 tuesday
2008-08-20 Wednesday
2008-08-21 thursday
2008-08-22 friday
2008-08-23 saturday
2008-08-24 sunday
2008-08-25 monday
2008-08-26 tuesday
2008-08-27 Wednesday
2008-08-28 thursday
2008-08-29 friday
2008-08-30 saturday
2008-08-31 sunday
2008-09-01 monday
2008-09-02 tuesday
2008-09-03 Wednesday
2008-09-04 thursday
2008-09-05 friday
2008-09-06 saturday
————————————————————————–
Class Variable Code 15:
class Second
puts @@a=34
def sec
puts @@a=66
end
end
class Check < Second
@@a=58
def one
@@a=34
end
end
c=Check.new()
puts c.one
puts c.sec
Output:
34
34
66
nil
————————————————————————–
Raveendran 