Venus Jain

• Aug 22nd, 2017

To call the method from Parent class

Satya

• Mar 11th, 2013

super is used to call the parent classes initialize method from the childs initialize method. super has following forms of implementation. 1. Calling only the super means, call the parents initialize ...

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Venus Jain

• Aug 22nd, 2017

For, each, while, until, upto, downto, times

karmue

 Profile Answers by karmue Questions by karmue

• Apr 1st, 2013

And this one

10.times do {|x| puts x}

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keerti

• Jan 22nd, 2017

ATOM

Giulio

• Feb 3rd, 2016

Any editor, Ruby is Editor independent.

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Riturathin Sharma

• Sep 28th, 2015

Code
 

karmue

 Profile Answers by karmue Questions by karmue

• Apr 1st, 2013

When you can finish your code in one line, use {|x| ..... }
when you have multiple lines in a blocki, use
do |x|
....
end

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Dwaraka

• Dec 19th, 2014

No. Please refer to answer given by Nox. When a variable is defined within the body of the class its called Class Instance Variable. It is like class variable but cannot be inherited. Usual use case is for setting up configuration files and is not unique for its subclasses.

Nox

• Feb 25th, 2014

There is a thing called class instance variable. Since any Ruby class is in fact object, you can define instance variables for it. It is generally advised to use @class_instance_variable on a class in...

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vijaysrinivas

• Feb 8th, 2013

Ruby is simple to use and flexible for object oriented and functional oriented

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Maruthi M G

• Apr 16th, 2012

Mac Os, Windows, Linux

Ayyappan K

• Sep 21st, 2007

Ruby is supported by windows and linux.

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Christopher Kleeschulte

• Feb 13th, 2012

According to Martin Fowler, http://martinfowler.com/bliki/ClassInstanceVariable.html, A Class Instance Variable is a class-level variable that DOES NOT get inherited in any of the subclasses like a cl...

hari

• Feb 3rd, 2012

Method should start with small letter.If the method name contain two words use underscore to separate the words
ex:get_name

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vijay prasad

• Jul 22nd, 2011

In Ruby the :var is used to define a symbol. A symbol ii ruby is created by adding 'colon' in-front of variable name .You can also create symbol by transforming a string to symbol using string#inte...

gikie

 Profile Answers by gikie Questions by gikie

• Dec 14th, 2009

:var : Semicolon followed by an identifier tells us that var is symbol.Two strings with same content may belong to two totally different objetcs but if you convert these two strings to symbol, both of...

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africangal

 Profile Answers by africangal Questions by africangal

• Mar 23rd, 2010

FALSE is a Boolean data type while NIL is not a data type.

kalyan.allampalli

 Profile Answers by kalyan.allampalli Questions by kalyan.allampalli

• May 19th, 2009

In Ruby nil is an Object for NilClass, You can directly check as nil.class?it will return NilClass.Where as false is an object for FalseClass.

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How to use two databases to a single application?

ericfeng

 Profile Answers by ericfeng Questions by ericfeng

• Sep 30th, 2009

This is for Ruby on Rails.1. Set the database at config/database.yml. ex mydb:    adapter: mysql    database: mydb    socket: /tmp/mysql.sock  &n...

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javierisassi

 Profile Answers by javierisassi Questions by javierisassi

• Jun 25th, 2009

It is a method that alters the attribute of an object.myabcs = ['a', 'b', 'c']#myabcs is of type Array.myabcs.reverse!# this method altered the object.p myabcs#outputs:#["...

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kalyan.allampalli

 Profile Answers by kalyan.allampalli Questions by kalyan.allampalli

• May 19th, 2009

A Global variable ($a) has a full scope in application. We can use any where in the application as you want.

Manikandan Mca

• Aug 18th, 2007

If you declare one variable as global we can access any where, where as class variable visibility only in the class?Exampleclass Testdef h? $a = 5? @b = 4?while $a > 0puts $a$a= $a - 1endendendtes...

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frikshun

 Profile Answers by frikshun Questions by frikshun

• Aug 13th, 2008

Don't forget the funky ones like a <=>  b, which returns 1 if a > b, 0 if a = b and -1 if a < b.

natchiar

• Aug 17th, 2007

Something thats used in an expression to manipulate objects such as + (plus), - (minus), * (multiply), and / (divide). You can also use operators to do comparisons,such as with , and &&.

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m_bhupendrain

 Profile Answers by m_bhupendrain Questions by m_bhupendrain

• Jun 21st, 2008

By applying the access modifier : Public , Private and Protected acces Modifier

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Ayyappan K

• Sep 21st, 2007

Classes,Objects,Inheritance,Singleton methods,polymorphism(accomplished by over riding and  overloading) are some oo concepts  supported by ruby.

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Ayyappan K

• Sep 21st, 2007

Iterator is handled using keyword 'each' in ruby.For example $no=[1,2,3]then we can use iterator as$no.each do |l|puts lendAbove prints the values of an array $no which is accomplished using iterator.

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natchiar

• Aug 17th, 2007

A new scope for a local variable is introduced in the toplevel, a class (module) definition, a method defintion. In a procedure block a new scope is introduced but you can access to a local variabl...

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natchiar

• Aug 17th, 2007

A method that loads and processes the Ruby code from a separate file, including whatever classes, modules, methods, and constants are in that file into the current scope. load is similar, but rather than performing the inclusion operation once, it reprocesses the code every time load is called.

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natchi

• Aug 17th, 2007

Def self.methodname----------------endordef classname.methodname----------------end

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