Error Handling

Avoid to over use error handling code, manage errors efficiently

Use Exception Instead of error code

• Simplify the code greatly
• Not an infinity of conditionals

Use unsigned exception

• Signed exception break the Opened Closed Principle
• It has effect on all the users of the class
• It depends from the language of course. Ex: Go doesn't not have exception classes

Provide context with exception

new IOException(’Imposible d’ouvrir foo.txt’);

Don't use exceptions in the logic

• Also depends of the language

Try not to return NULL

• You're asking for trouble when you do
• Solutions: Null Objects, Maybe Objects, empty objects...
• Tell don't ask
• This is not the opinion of everybody in the community

Do not pass null as an argument

• Leads to ugly code in general

Never kill an exception

• Creates security leaks