I'm wanting to modify a variable in place, replicating the methodname! syntax as opposed to reassigning a new modified value to the same var. Can I do this with a proc? I'm still learning procs and see them as quite useful is used properly.
a = "Santol bag 85.88 www.example.com/products/16785
Shaddock kg 2.94 www.example.com/products/4109
Palm Fig 5kg 94.34 www.example.com/products/23072
Litchee lb 95.85 www.example.com/products/2557"
a = a.split("\n")
linebreak = Proc.new { |text| text.split("\n") }
linebreak![a]
that first reassignment seems cumbersome. The proc version I would like to see if I can perform it inline. Is this possible?
methodname! is just a convention - usually there are two flavours of the same method - one without bang and one with bang. If you want to have a proc that mutates its params, you need to implement it using mutating methods.
And in this case it's not possible, because you're trying to transform a string into an array. You have to reassign the variable:
linebreak = Proc.new { |text| text.split("\n") }
a = linebreak.call(a)