Re^3: Check if module is installed

You want string eval:

eval "use Some::Module 94.5";
 
if($@) {
  print "Oh noes, it's not installed!\n";
} else {
  ...
}
[download]

Comment on Re^3: Check if module is installed Download Code

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Re^4: Check if module is installed by JavaFan (Canon) on Nov 16, 2009 at 11:46 UTC
Checking $@ is not an appropriate way to check if an eval failed. An eval can fail, but in the clean up (DESTROY for instance), something can unset $@. The only way to make sure an eval succeeded is to check its return value: `eval "use Some::Module 94.5; 1" or do { printf "Loading Some::Module failed: %s", $@ // "Unknown error"; ... };` [download]	[reply] [d/l]
Re^5: Check if module is installed by DrHyde (Prior) on Nov 17, 2009 at 10:36 UTC
Can you give an example that would make my code Do The Wrong Thing? Cos I can't think of any way of doing that.	[reply]