Ruby examples (example source code) Organized by topic

Ruby

Rails /

Action 4 Application Framework 1

Controller 1 Cookie 1

Environment 1 ERB 7

Form Checkbox 1 Form RadioButton 1

Form Select 2 Form TextField 1

Form 2 Model 3

Rails 1 Session 1

View 4

ActiveRecord /

Assumption from ActiveRecord 3 Connection String 1

Delete 4 Insert 1

Map to SQL 6 One to Many 2

Primary key 1 Search 9

Table Name 6 Transactions 1

Update 2

Unit Test /

assert 5 Unit Testing 10

CGI /

CGI Form 5 CGI Variables 1

CGI 2 Cookie 1

HTML 9 Parameters 1

Network /

action_mailer 2 Authentication 1

DNS 2 Email POP3 8

FTP Client 14 Ftp 1

hpricot HTML Parsing 5 HTML Builder 2

HTML Parser 4 HTTP Post 5

HTTP Reponse 11 HTTPS 5

IMAP 1 IP Address 4

mongrel Web Server 2 net http library 3

open uri 10 ping 4

Proxy 2 RSS 2

Ruby remoting 4 Server by gserver 4

SOAP 3 ssh 4

TCP Server 4 TCPSocket 3

Telnet 2 UDP Client 1

UDP Server 2 URI 10

Webrick Web Server 3 XML RPC 2

xmlrpc 8

Threads /

abort_on_exception 2 alive 1

critical 1 Daemon 3

exit 1 fork 6

join 6 kill 1

Mutex 2 pass 1

priority 2 Process 1

raise 1 Ruby Threads 4

run 1 safe_level 1

SizedQueue 1 sleep 5

status 1 stop 2

Synchronization 6 Thread.main 2

Thread.new 6 Thread.pass 1

wakeup 2

Array /

Array Addition 3 Array Creation 15

Array Each 3 Array Elements 9

Array Extension 16 Array Index 11

Array Length 1 Array Literal 2

Array Subtraction 1 Array.new 7

As Set 11 clear 1

clone 1 collect 3

combination 1 compact 1

Compare Array 5 concat 1

count 1 cycle 1

delete 2 delete_at 1

drop_while 1 each 5

each_index 1 each_with_index 1

empty 2 fill 1

find_all 1 find_index 1

first 2 freeze 1

grep 4 group_by 1

include 3 inject 3

insert 1 inspect 2

join 3 last 2

map 4 max 1

max_by 1 min 1

Multidimensional Arrays 7 Object array 1

pack 2 permutation 1

Pop 1 Print Array 1

product 1 Push 5

Range Index 2 reject 2

replace 1 reverse 3

reverse_each 2 select 1

shift 1 slice 4

sort 5 step 1

take_while 1 to Hash 1

to String 2 transpose 1

Two Array Indices 7 uniq 3

unpack 1 unshift 1

Hash /

assoc 1 clear 2

Compare 1 Converrt to Hash 1

Convert to Array 1 Convert to String 2

default 2 default_proc 1

delete 4 delete_if 5

each 4 each_key 2

each_value 2 empty 1

find 1 freeze 1

Hash Creation 11 Hash Elements 3

Hash Extensions 4 Hash Keys 11

Hash Length 1 Hash values 3

Hash.new 8 has_key 1

has_value 2 include 1

index 5 inject 2

invert 1 Key value 2

member 1 merge 4

Nested hash 2 Print Hash 4

rehash 1 reject 1

replace 3 select 1

shift 1 sort 2

sort_by 1 store 1

update 1 values 1

Range /

As Iterator 4 collect 1

Convert to Array 2 Date Range 4

drop 1 each 3

entries 1 find_all 1

first 1 include 1

inject 2 max 1

min 1 minmax 1

minmax_by 1 multi letter based range 1

partition 1 Range Creation 9

Range Extension 2 Range include 7

Range Min Max 3 Range.new 1

reduce 1 reverse_each 1

select 1 take 1

to Set 1 with case 1

with for 6 zip 1

Collections /

Comparable 4 Enumerable 10

Forwardable 3 Set 41

Your Hash 1 Your queue 1

Your stack 1 Your tree 8

Number /

abs 2 between 1

BigDecimal 12 Bignum class 3

Bignum 1 Binary number 4

ceil 1 coerce 1

Complex Numbers 1 Convert from Integer 1

Convert to Char 3 Convert to Float 4

Convert to Integer 14 Convert to String 8

Fixnum class 6 Fixnum extension 5

Float Extension 3 float 12

floor 1 hexadecimal numbers 3

infinite 4 Integer 12

matrix 4 nan 5

next 4 nonzero 4

Number class 7 Number Literal 7

Numeric class 7 octal numbers 3

Prime Numbers 6 Rational Numbers 16

round 4 shift 2

zero 2

Method /

alias 5 args 1

binding 2 block_given 3

call 1 Code Block 16

def 3 defined 1

define_method 3 lambda 6

Method Arguments 12 Method Creation 9

Method objects 1 Method Pointer 4

Overloading 1 Procs 8

recursive 1 remove_method 3

return 10 send 2

undef 1 Utility Method 6

Variable Number Arguments 5 yield 10

Class /

abstract class 2 Access level 4

attr 2 attr_accessor 5

attr_reader 4 attr_writer 3

child class 4 Class Defintion 11

Class Methods 4 Class Variables 3

clone 3 DelegateClass 2

Encapsulation 1 eql 2

equal 3 freeze 2

getter setter 9 include 4

inheritance 10 initialize class 5

inspect 2 instance variables 5

interface 1 Member method 6

Multiple inheritance 2 nested classes 2

new 2 object Creation 3

Object in Ruby 4 OpenStruct 1

Operator 2 Overriding Methods 4

Polymorphism 1 private 2

Protected 2 Public 2

Readable attributes 2 self 2

singleton method 4 Struct 1

super 2 tainted 3

to String 4 Virtual method 2

Writable Attributes 2

Reflection /

ancestors 2 caller 2

Class Reflection 6 class_eval 2

class_variable_get 1 eval 3

extend_object 1 FILE 1

find_all 1 global_variables 1

inherited 1 instance_eval 1

instance_method 1 instance_of 6

instance_variables 1 instance_variable_set 1

is_a 1 kind_of 3

local_variables 1 Method Reflection 5

method_added 1 method_defined 1

method_missing 6 Module Reflection 2

module_eval 2 Object 7

ObjectSpace 3 object_id 4

private_class_method 1 private_instance_methods 1

protected_instance_methods 1 protected_methods 1

remove_const 1 respond_to 5

set_trace_func 1 singleton_methods 1

singleton_method_added 3 superclass 3

variable Reflection 1

Database /

dbi drivers 1 dbm 4

Mysql 1 ODBC 1

Oracle 2 postgres 2

pstore 1

File Directory /

atime 2 basename 2

Binary File 7 blksize 1

blockdev 1 blocks 1

chardev 1 chdir 2

chmod 8 chown 1

close a file 1 ctime 2

delete 3 dev 3

Dir rewind 1 Dir.delete 1

Dir.entries 3 Dir.foreach 2

Dir.getwd 1 Dir.glob 1

Dir.open 2 Dir.pwd 1

Dir.reject 2 Dir.rmdir 1

Dir 10 directory list 2

directory 2 dirname 1

each byte 3 each line 2

each 2 eof 1

Executable.File 1 executable_real 1

exist 4 expand_path 1

extname 1 File class 2

file handle 1 File position 2

File SEPARATOR 2 File tests 4

File type 1 File.exists 2

File.new 5 file 1

Find 11 flock 1

fnmatch 2 ftype 2

gets 3 gid 1

grpowned 1 identical 2

ino 1 IO.close 1

IO.fileno 1 IO.flush 1

IO.foreach 2 IO.new 3

IO.popen 4 IO.puts 1

IO.read 3 IO.readlines 2

join 2 lock 1

lstat 2 mkdir 4

mode 1 mp3 file 2

mtime 2 nlink 1

Open a File 9 owned 1

path 1 pipe 1

putc 1 puts 2

pwd 2 rdev 3

Read lines together 3 read 4

Readable File 1 readable_real 1

readline 2 readlink 1

rename 1 seek 2

setgid 1 setuid 1

set_encoding 2 size 4

socket 1 split 1

stat 1 sticky 1

StringIO 7 subclass File 1

symlink 2 sysread 1

syswrite 2 tell 1

Tempfile 4 Text file 8

tmpdir 2 truncate 2

uid 1 ungetc 1

unlink 1 unmask 1

Utilities 10 utime 1

Word counter 4 world_readable 1

Writable File 1 writable_real 1

write 2 zero 1

XML /

rexml 18 XML Builder 4

xmlparser 1 XPath 10

YAML 6

Date /

ajd 1 Date Calculation 11

Date.new 5 DateTime 16

downto 1 gregorian 1

julian 3 mjd 1

next 2 parse 3

strptime 4 to String 1

to Time 2 today 1

upto 1

Time /

Compare Time 2 Convert to Date 1

Convert to Integer 1 ctime 1

Day Light Saving 5 day 1

dst 1 gm 2

hour 1 local 5

now 3 strftime 9

Time Calculation 5 Time class 3

Time Extension 3 Time format 5

Time Zones 2 timer 1

utc 2 year 1

String /

capitalize 3 casecmp 2

char in string 14 char range 4

chomp 3 chop 3

concat 2 Convert Number 3

Convert to Array 3 Convert to String 3

Convert to Symbol 2 crypt 1

delete 5 downcase 3

dump 1 each 2

each_byte 6 each_char 3

each_line 1 each_with_index 1

empty 1 encoding 10

end_with 1 eq 1

Escape Characters 14 force_encoding 1

freeze 5 grep 12

gsub 14 hash value 1

hash 1 Here Document 3

include 2 index 4

insert 3 intern 2

Justify Center 5 Justify Left 2

Justify Right 4 length 2

lines 1 match 6

matching operator 2 multiply strings 4

next 8 replace 3

reverse 5 scan 15

select 2 slice 3

split 8 squeeze 1

String class Extension 20 String comparisons 10

String Concatenation 7 String format 5

String from Right 1 String Literal 9

String Quotation 9 String Range 7

string variable 4 String.new 5

Strip from Left 2 Strip from right 1

Strip 5 sub with regular expressions 8

sub 1 succ 3

sum 2 swapcase 2

tr 2 tr_s 1

unicode 5 upcase 5

upto 1 wrap 2

Design Patterns /

Command 4 Composite 5

Decorator 1 Factory 2

Iterator 1 Observer 4

Singletons 6 Strategy 3

GUI /

gtk 2 opengl 1

wxruby 1

Tk /

Entry TextField 2 Layout 5

Main Window 3 TkButton 2

TkLabel 3 TkListbox 1

TkRadioButton 1

Language Basics /

Bitwise Operations 5 Boolean Operators 9

Boolean variable 2 Code statement 2

Comments 5 Comparison Operators 5

Constants 7 Global Constants 1

Global Variables 2 Interpolating 15

irb 4 load 2

Math Operators 10 Mixins 5

Modules Creation 16 nil 5

Operator Precedence 2 Operators 2

Parallel Assignment 2 Predefined Variables 1

putc 1 puts 23

rake 2 RDoc 5

require 4 Reserved words 5

ri 5 Ruby Commandline 3

Ruby Interpreter 5 RubyGems 12

shebang line 2 STDOUT 2

Symbols 7 Ternary Operator 4

Variable scope 5 Variables 23

Statement /

BEGIN END 3 break 5

case 9 catch 2

downto 5 ensure 1

for 4 if as modifier 5

If 18 in 3

include 1 loop 1

next 1 raise 5

redo 1 rescue 6

retry 2 step 1

throw 2 times 8

unless as Modifiers 2 unless 4

Until as modifier 1 until 6

upto 10 while as Modifier 2

while 8

Development /

ARGF 3 ARGV 4

Aspect Oriented Programming 1 Benchmark 5

chomp 2 Command line 1

csv 10 Data Type 2

Embedded Ruby 5 Embeded C 1

ENV 2 eval 5

Exception 4 exec 1

GC 2 gem 7

Generator 2 gets 8

KCODE 8 Kernel 1

Keyboard reading 1 logger 4

Marshal 2 Match Operator 2

Math extensions 9 Math.constants 3

Math 10 print 3

printf 5 Process 4

profile 2 PStore 2

rand 7 Regexps Group 5

Regexps Repetition 18 Regexps 29

RUBY_PLATFORM 1 scanf 1

Shell 1 sprintf 5

SyncEnumerator 1 system 5

Timeout 2 Unicode 1

Utility Regexps 3 Your Exception 3

zip 3

Windows Platform /

Dialog 1 Excel 5

Internet Explorer 7 Powerpoint 1

Sound 1 Win32API 5

winsock 1 Word 4