Julia - 检查字符串中的每个字符是小写还是空格

Question

如何检查字符串中的每个字符是小写还是空格？

"this is all lowercase"   -> true 
"THIS is Some uppercase " -> false 
"HelloWorld  "             -> false 
"hello world"              -> true

Answer 1

你可以使用谓词/ itr方法all(docs:

julia> f(s) = all(c->islower(c) | isspace(c), s);

julia> f("lower and space")
true

julia> f("mixED")
false