RosettaCodeData/Task/Determine-if-a-string-is-numeric/Pluto/determine-if-a-string-is-numeric.pluto

function chk(a)
    return tonumber(a) != nil
end

a = {"123", "-320",
    "-1342.40", "abc",
    "1,234", "a123.0"}

a:map(chk); print(a:unpack())