Being a newbie I probably not understand how to best utilize it, but I really really miss a “case insensitive” option on string().
If I would like to match a word, eg "name" in a string, I would like to use the function string("name"). But if the string contains "NAME" or "Name", I will get no match.
I really need the original cases on the string, otherwise I would just use String.downcase, but this is not an option for me.
I came here to ask the same question and see if there was a better solution than the one I already have - which is basically the same as the one outlined by @tmbb. I created a helper combinator for it which may help others searching for the same answer. Note my version assumes ASCII input only since that fits the problem domain I am working on.
def anycase_string(string) do
string
|> String.upcase
|> String.to_charlist
|> Enum.reverse
|> char_piper
|> reduce({List, :to_string, []})
end
defp char_piper([c]) when c in ?A..?Z do
c
|> both_cases
|> ascii_char
end
defp char_piper([c | rest]) when c in ?A..?Z do
rest
|> char_piper
|> ascii_char(both_cases(c))
end
defp char_piper([c]) do
ascii_char([c])
end
defp char_piper([c | rest]) do
rest
|> char_piper
|> ascii_char([c])
end
defp both_cases(c) do
[c, c + 32]
end