Ruby Language Strings Joining Strings
Example
Array#join joins an Array into a String, based on a delimiter:
["alpha", "beta"].join(",")
# => "alpha,beta"
The delimiter is optional, and defaults to an empty String.
["alpha", "beta"].join
# => "alphabeta"
An empty Array results in an empty String, no matter which delimiter is used.
[].join(",")
# => ""
