In Ruby, you can make all strings in an array of strings uppercase by calling the String#upcase
method on every element of the array using Array#map
, for example, like so:
arr = ["foo", "Bar", "bAz"]
new_arr = arr.map { |item| item.upcase }
print new_arr #=> ["FOO", "BAR", "BAZ"]
You could also shorten this by using the &:
syntax, for example, like so:
arr = ["foo", "Bar", "bAz"]
new_arr = arr.map(&:upcase)
print new_arr #=> ["FOO", "BAR", "BAZ"]
Using either of the above would create a new array with all strings in the array in uppercase. If you want to mutate the original array instead, then you simply need to use Array#map!
instead of Array#map
, for example, like so:
arr = ["foo", "Bar", "bAz"]
arr.map!(&:upcase)
print arr #=> ["FOO", "BAR", "BAZ"]
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