Ruby Koans #3 (Strings)

There’s a question in the string file.

# THINK ABOUT IT:
#
# Ruby programmers tend to favor the shovel operator (<<) over the
# plus equals operator (+=) when building up strings.  Why?

I was able to find the answer here. The += operator will create a new instance of a string. The << operator will append in place, as long as there’s enough room for the currently allocated string object.