String interpolation at a later stage

Ruby
1

x = ‘hello’
y = ‘#{x} world’

desired result = ‘hello world’

Please note that variable y has the string interpolation code under
single quotes.

I have these two values x and y. And with that I need to get to the
desired result. Any suggestion on how to do that.

I tried eval y but that won’t work because world is not a variable.

2

desired result. Any suggestion on how to do that.

I tried eval y but that won’t work because world is not a variable.

eval %Q[“#{y}”]

Jan

3

On Jan 16, 10:41 am, Raj S. [email protected] wrote:

I tried eval y but that won’t work because world is not a variable.

Posted viahttp://www.ruby-forum.com/.

try:
z = ‘"’ + y + ‘"’
zz = eval z

4

On Jan 16, 2009, at 10:41 AM, Raj S. wrote:

x = ‘hello’
y = ‘#{x} world’

desired result = ‘hello world’

This might not be exactly what you were asking for but might be
helpful none the less:

x = ‘hello’
lazy = lambda {"#{x} world"}

result = lazy.call
result = lazy[]

or maybe even…

def lazy.to_s
call
end

puts lazy # hello world

x = ‘goodbye’

puts lazy # goodbye world