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Idioms
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Idiom # 137: Check if string contains only digits
Idiom # 137: Check if string contains only digits
See
programming-idioms.org
:
Code
is_digit(cp codepoint) => "012345689".as_codepoints ∃ digit -> digit = codepoint s := "012345689" b := s.as_codepoints ∀ (x -> is_digit x)
What are effects?
Running Example
ex137 is is_digit(cp codepoint) => "012345689".as_codepoints ∃ digit -> digit = cp s1 := "012345689" b1 := s1.as_codepoints ∀ (x -> is_digit x) say b1 s2 := "a012345689" b2 := s2.as_codepoints ∀ (x -> is_digit x) say b2
What are effects?
next: NYI: Idiom # 138: Create temp file
