str.chomp!

masternerdguy · 07-17-2007, 10:44 AM

In ruby, what does the line str.chomp! do if str is a string?

ghostdog74 · 07-17-2007, 10:56 AM

Code:

"hello".chomp            #=> "hello"
"hello\n".chomp          #=> "hello"
"hello\r\n".chomp        #=> "hello"
"hello".chomp("llo")     #=> "he"

you should read up a ruby tutorial/book/web page before posting here. it will save you a lot of time.

taylor_venable · 07-17-2007, 12:36 PM

String#chomp([param]) returns a new string that's the same as the receiver* but with the line endings (or optional parameter) removed from the end.

String#chomp!([param]) modifies the receiver; in other words, it's destructive -- it mutates the original string rather than producing a new one.

Scheme also follows this tradition of putting exclamation marks after destructive functions.

* receiver being the object on which the "method" is called (in Ruby-speak, inheriting from Smalltalk-speak, methods are "messages" and the objects on which they are called are "receivers").

masternerdguy · 07-17-2007, 02:39 PM

Thank you. That is all I wanted to know.