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Let’s take a look at how to do that with a text field that is only supposed to have a value of either ‘AAAA’ or ‘BBBB’ (yes, I know that this does not make much sense in a real PDF form).
So, if the user enters ‘01234’ we should see an error message that would instruct the user about what type of data is valid for this field.
To start, we create a text field and bring up the properties dialog for the field.
Then we select the “Validate” tab to see the validation options: The default is that the field will not get validated.
In bash speak true means it exits with a zero status, anything else is false.
The status of a command/function is stored in the bash variable "$? variable so that rather than parsing words as whitespace separated items, bash parses them as dot separated.
64 bytes from 220.127.116.11: icmp_seq=1 ttl=52 time=65.0 ms 64 bytes from 18.104.22.168: icmp_seq=2 ttl=52 time=93.5 ms 64 bytes from 22.214.171.124: icmp_seq=3 ttl=52 time=66.0 ms --- 66.240.62321 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2001ms rtt min/avg/max/mdev = 65.090/74.920/93.578/13.202 ms This does not handle IPv6 addresses which is a much more trickier gambit.
And a combination of IPv4/ IPv6 addresses would indeed make things interesting.
Another thing I like to do is to display the validation error message on the form in an otherwise hidden field: The problem with our last solution is that if the user saves a partially filled form, and picks it up at a later time, that error message that popped up is long gone, and the only indication that there is something wrong with the form is the modified field color.
So, having a text field contain that error message might be a good idea.
Which appears to indicate that you need to escape curly brackets for them to work, but that does not appear to be the case.
I think the problem may be that even though the above link appears as part of the I tried this with bash, since I wasn't aware that bash supported regular expressions, and it fell over when it encountered '=~', since it didn't know wnything about regular expressions. $ perl -MSocket -le'print inet_ntoa inet_aton q/ 126.96.36.199 $ perl -MSocket -le'print unpack q/N/, inet_aton q/188.8.131.52/' 1123087217 $ ping 1123087217 PING 1123087217 (184.108.40.206) 56(84) bytes of data.
Each of the four numbers has a valid range of 0 to 255.Tags: Adult Dating, affair dating, sex dating