Question about the evaluation of x = 'foo' if false

Ruby
1

Hello,

I am kind of lost with the nil result while I am expecting a false:

irb(main):001:0> x = ‘foo’ if false
=> nil
irb(main):002:0> x
=> nil
irb(main):003:0> x = ‘foo’ if true
=> “foo”
irb(main):004:0> x
=> “foo”

Thanks in advance for sharing your knowledge,

2

On Mar 17, 12:01 pm, Aníbal Rojas [email protected] wrote:

irb(main):004:0> x
=> “foo”

Thanks in advance for sharing your knowledge,

–
Anìbal Rojas

See
http://www.ruby-doc.org/docs/ProgrammingRuby/html/tut_expressions.html#UH
‘if’ doesn’t return the logical value it evaluates, it returns the
value of the last statement
executed, in the false case nothing is executed, and nil is Ruby’s
nothing value

Cheers

3

On Mar 17, 12:01 pm, Aníbal Rojas [email protected] wrote:

irb(main):004:0> x
=> “foo”

Thanks in advance for sharing your knowledge,

Another way to think about it is that the above constructs are
alternate ways of expressing the following:

if false then x = ‘foo’ end
if true then x = ‘foo’ end

– Mark.

4

Thanks for your responses!

–
Aníbal