Remove a character at an index position in Ruby

Question

Basically what the question says. How can I delete a character at a given index position in a string? The String class doesn't seem to have any methods to do this.

If I have a string "HELLO" I want the output to be this

["ELLO", "HLLO", "HELO", "HELO", "HELL"]

I do that using

d = Array.new(c.length){|i| c.slice(0, i)+c.slice(i+1, c.length)}

I dont know if using slice! will work here, because it will modify the original string, right?

Answer 1

If you're using Ruby 1.8, you can use delete_at (mixed in from Enumerable), otherwise in 1.9 you can use slice!.

Example:

mystring = "hello"
mystring.slice!(1)  # mystring is now "hllo"
# now do something with mystring

Answer 2

Won't Str.slice! do it? From ruby-doc.org:

str.slice!(fixnum) => fixnum or nil [...]

 Deletes the specified portion from str, and returns the portion deleted.