How can I check if a string is a valid number?
Often, a 'valid number' means a Javascript number excluding NaN and Infinity, ie a 'finite number'. To check the numerical validity of a value (from an external source for example), you can …
ubuntu - gpg: no valid OpenPGP data found - Stack Overflow
And if it was permission issue, it would say so, not gpg: no valid OpenPGP data found .
Check if a string is a valid date using DateTime.TryParse
58 I am using DateTime.TryParse() function to check if a particular string is a valid datetime not depending on any cultures. To my surprise , the function returns true for even strings like "1 …
What constitutes a "valid" C Identifier? - Stack Overflow
@Olaf I'm talking C identifiers. All valid C is valid Objective-C, so the superset of C is irrelevant.
regex - Validating IPv4 addresses with regexp - Stack Overflow
Following are the rules defining the valid combinations in each number of an IP address: Any one- or two-digit number. Any three-digit number beginning with 1. Any three-digit number …
How to check whether a string is Base64 encoded or not
All that you can determine is that the string contains only characters that are valid for a base64 encoded string. It may not be possible to determine that the string is the base64 encoded …
How can I validate an email address using a regular expression?
Over the years I have slowly developed a regular expression that validates most email addresses correctly, assuming they don't use an IP address as the server part. I use it in several PHP …
What does the @Valid annotation indicate in Spring?
Aug 29, 2010 · IIRC @Valid isn't a Spring annotation but a JSR-303 annotation (which is the Bean Validation standard). What it does is it basically checks if the data that you send to the method …
java - "PKIX path building failed" and "unable to find valid ...
Jan 12, 2014 · sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target While some of the other answers are appropriate and …
How to check for a valid Base64 encoded string - Stack Overflow
Title and first sentence ask different question. You can determine if a given string is valid base64 encoded string, but you cannot determine if a string is base64 encoded or not.