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regexjulialowercase

Julia: Check if first Letter in String Is Lowercase preferred syntax

Let's say I have a string x="1. this should be capitalized"

Right now if I want to check if the first letter is capitalized 

s = "1. (t)his should be capitalized"
s2 = match(r"^.*?([a-zA-Z])", s).captures[1]
@show all(islowercase, s2)
# true

If I do islowercase(s2) I get a MethodError. Though I could also do @show uppercasefirst(s2) != s2 but this seems unnecessarily verbose.

Solution

  • As you have noted, islowercase works with individual characters, and not strings. To extract the first character from the regex match string you can use first:

    julia> s = "1. (t)his should be capitalized";

julia> s2 = match(r"^.*?([a-zA-Z])", s).captures[1]
"t"

julia> islowercase(first(s2))
true