String concatenation vs. interpolation in Ruby

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Whenever TIMTOWTDI (there is more than one way to do it), you should look for the pros and cons. Using “string interpolation” (the second) instead of “string concatenation” (the first):

Pros:

  • Is less typing
  • Automatically calls to_s for you
  • More idiomatic within the Ruby community
  • Faster to accomplish during runtime

Cons:

  • Automatically calls to_s for you (maybe you thought you had a string, and the to_s representation is not what you wanted, and hides the fact that it wasn’t a string)
  • Requires you to use " to delimit your string instead of ' (perhaps you have a habit of using ', or you previously typed a string using that and only later needed to use string interpolation)

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