Comments on: Go Fetch

By: avdi

avdi — Thu, 19 Nov 2009 01:24:32 +0000

Then they should read this article… or the Ruby documentation

By: phoenixchu

phoenixchu — Wed, 18 Nov 2009 23:37:26 +0000

it maybe cause some misunderstanding if other developers don't know fetch method for default value usage

By: avdi

avdi — Wed, 18 Nov 2009 17:24:06 +0000

Indeed. This feature is useful in cases where you know you want to treat all missing values in the same way.

By: Farrel

Farrel — Wed, 18 Nov 2009 16:44:00 +0000

With Hash you can initialise it with a block of code that does the same thing without using fetch.

h = Hash.new{ raise IndexError }
h[ :a ] = 1
h[ :a ] # => 1
h[ :b ] # IndexError raised.

By: Steve Eichert

Steve Eichert — Fri, 03 Apr 2009 18:45:03 +0000

Very cool. Not sure why but I don't think I've ever come across fetch before. It will make some code a bit cleaner, thanks!

By: Jhonez

Jhonez — Mon, 30 Mar 2009 19:01:00 +0000

I didn't know about #fetch methods .
Thanks for pointing it out !…………………………….. : )

By: Mike Subelsky

Mike Subelsky — Wed, 18 Mar 2009 13:07:14 +0000

This is great! I'm totally using this everywhere from now on. Thanks for pointing it out!

By: avdi

avdi — Tue, 17 Mar 2009 10:22:34 +0000

Dude, I either forgot about or didn't know about that form. Either way, thanks for bringing that up!

By: Ben Mabey

Ben Mabey — Tue, 17 Mar 2009 04:03:26 +0000

Thanks for the informative post! I had forgotten all about #fetch, but you make a very good case for using it. BTW, from the docs, another way of writing your last example would be without the block like so:

verbose = options.fetch('verbose', false)

I think I like the block syntax better though. It seems to communicate better.

By: avdi

avdi — Tue, 17 Mar 2009 00:20:14 +0000

Hey Patrick, great to hear it was of use to you!