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I’m currently reading Agile Web Development With Rails, 3rd edition. On page 672, I came across this method:
def capitalize_words(string)
string.gsub(/\b\w/) { $&.upcase }
end
What is the code in the block doing? I have never seen that syntax. Is it similar to the array.map(&:some_method) syntax?
It’s Title Casing The Input. inside the block, $& is a built-in representing the current match (\b\w i.e. the first letter of each word) which is then uppercased.