{"id":299,"date":"2012-10-18T10:11:12","date_gmt":"2012-10-18T10:11:12","guid":{"rendered":"http:\/\/nicholshayes.co.uk\/blog\/?p=299"},"modified":"2013-10-31T15:56:11","modified_gmt":"2013-10-31T15:56:11","slug":"playing-with-exceptions","status":"publish","type":"post","link":"http:\/\/nicholshayes.co.uk\/blog\/?p=299","title":{"rendered":"Playing with exceptions"},"content":{"rendered":"

I’ve just been having a little play with exceptions, as a new colleague wanted to understand how different errors could be handled. There is a good description of how they work in the “Exceptions, Catch, and Throw” chapter of the origin Pickaxe book<\/a>.<\/p>\n

I created the following script to demonstrate how it works<\/p>\n

module<\/span> Play
\n  def<\/span> self<\/span>.do<\/span> &<\/span>er
\n    begin<\/span>
\n      puts<\/span> "\\n<\/span>"<\/span>
\n      er.call<\/span>
\n    rescue<\/span> SyntaxError<\/span>, KeyError =><\/span> e
\n      puts<\/span> "One of SyntaxError, KeyError"<\/span>
\n      output(<\/span>e)<\/span>
\n    rescue<\/span> RuntimeError<\/span> =><\/span> e
\n      puts<\/span> "Another known error"<\/span>
\n      output(<\/span>e)<\/span>
\n    rescue<\/span> =><\/span> e
\n      puts<\/span> 'Unknown error'<\/span>
\n      output(<\/span>e)<\/span>
\n    end<\/span>
\n  end<\/span>
\n
\n  def<\/span> self<\/span>.output<\/span>(<\/span>error)<\/span>
\n    puts<\/span> "#{error.class}: #{error.message}"<\/span>
\n  end<\/span>
\nend<\/span>
\n
\nPlay.do<\/span> {<\/span>raise<\/span> SyntaxError<\/span>}<\/span>
\n
\nPlay.do<\/span> {<\/span>raise<\/span> "Gor Blimey"<\/span>}<\/span>
\n
\nPlay.do<\/span> {<\/span>HeBeJeeBees}<\/span><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

I’ve just been having a little play with exceptions, as a new colleague wanted to understand how different errors could be handled. There is a good description of how they work in the “Exceptions, Catch, and Throw” chapter of the … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"_links":{"self":[{"href":"http:\/\/nicholshayes.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/299"}],"collection":[{"href":"http:\/\/nicholshayes.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/nicholshayes.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/nicholshayes.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/nicholshayes.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=299"}],"version-history":[{"count":9,"href":"http:\/\/nicholshayes.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/299\/revisions"}],"predecessor-version":[{"id":464,"href":"http:\/\/nicholshayes.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/299\/revisions\/464"}],"wp:attachment":[{"href":"http:\/\/nicholshayes.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/nicholshayes.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=299"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/nicholshayes.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}