Carlos C.Gonzalez wrote:
>Hi everyone,
>
>Given the following code why does it print out "Valid chars in string."?
>In other words why does the space between "San" and "Jose" not make the
>if expression true?
>
>my $string = "San Jose";
>
>if ($string !~ /[a-zA-Z]/) {
> print "Invalid characters in string."
>}
>else {
> print "Valid chars in string."
>}
>
You are saying - "Report invalid characters unless there are
alphabetical characters in the string".
But there are alphabetical characters in the string...
You shuld have said - "Report invalid characters unless there are ONLY
alphabetical characters in the string, from the beginning to the and".
That is instead of:
if ($string !~ /[a-zA-Z]/) {
you should have written
if ($string !~ /\A[a-zA-Z]\Z/) {
(\A meaning beginning and \Z the end of the string).
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