A string is almost certainly an integer if it does not contain any non-digits ("\D").

Almost:

>perl -e 'for ("1", "22", "abc", "1e4", "0xABCD", "") { /\D/ or print 
+"\"$_\" is an integer\n" }'
"1" is an integer
"22" is an integer
"" is an integer
>

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Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re^2: unicode string comparison (perl 5.26) by afoken
in thread unicode string comparison (perl 5.26) by md351

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