What does %q do?

ruby-talk
1

What does %q do in ruby?

···

--
Posted via http://www.ruby-forum.com/.

2

%q{abc} is equivalent to writing "abc". It's most useful when you have
a string literal that contains a lot of characters you'd need to
escape. Compare:

"Gaba Luschi asked the ruby-talk list, \"What does %q do?\""

vs.

%q{Gaba Luschi asked the ruby-talk list, "What does %q do?"}

And note they're equal:

a = %q{Gaba Luschi asked the ruby-talk list, "What does %q do?"}
b = "Gaba Luschi asked the ruby-talk list, \"What does %q do?\""

a == b

=> true

~ jf

···

--
John Feminella
Principal Consultant, BitsBuilder
LI: http://www.linkedin.com/in/johnxf
SO: User John Feminella - Stack Overflow

On Sun, Feb 13, 2011 at 19:39, Gaba Luschi <friedoysterlover@gmail.com> wrote:

What does %q do in ruby?

--
Posted via http://www.ruby-forum.com/\.

3

Also, lowercase q is like single quotes, but uppercase Q is like double
quotes:

%q(1#{1+1}3) # => "1\#{1+1}3"
%Q(1#{1+1}3) # => "123"

4

Whoops, small typo:

%q{abc} is equivalent to writing "abc".

should read:

%q{abc} is equivalent to writing 'abc' (single quotes).

By contrast, %Q{abc} is equivalent to writing "abc" (double quotes).
You can see the difference when you try to substitute variables:

f = "apple"

%q{#{f}}

=> "\#{f}"

%Q{#{f}}

=> "apple"

~ jf

···

--
John Feminella
Principal Consultant, BitsBuilder
LI: http://www.linkedin.com/in/johnxf
SO: User John Feminella - Stack Overflow

On Sun, Feb 13, 2011 at 19:46, John Feminella <johnf@bitsbuilder.com> wrote:

%q{abc} is equivalent to writing "abc". It's most useful when you have
a string literal that contains a lot of characters you'd need to
escape. Compare:

"Gaba Luschi asked the ruby-talk list, \"What does %q do?\""

vs.

%q{Gaba Luschi asked the ruby-talk list, "What does %q do?"}

And note they're equal:

a = %q{Gaba Luschi asked the ruby-talk list, "What does %q do?"}
b = "Gaba Luschi asked the ruby-talk list, \"What does %q do?\""

a == b

=> true

~ jf
--
John Feminella
Principal Consultant, BitsBuilder
LI: http://www.linkedin.com/in/johnxf
SO: User John Feminella - Stack Overflow

On Sun, Feb 13, 2011 at 19:39, Gaba Luschi <friedoysterlover@gmail.com> wrote:

What does %q do in ruby?

--
Posted via http://www.ruby-forum.com/\.