Programming-Idioms

Edit summary for version 15 by Nepta:
New Lua implementation by user [Nepta]

↷

2016-09-14, 20:42:12

2016-11-06, 21:16:21

Idiom #137 Check if string contains only digits

Set boolean b to true if string s contains only characters in range '0'..'9', false otherwise.

Set boolean b to true if string s contains only characters in range '0'..'9', false otherwise.

b = tonumber(s) ~= nil

you could use pattern too

http://www.lua.org/manual/5.3/manual.html#pdf-tonumber

http://codepad.org/mofwXd2y

Next change ↷