do/end

Braces Vs Do/End - { |one, step, back| }

onestepback.org 12 Feb '12, 11pm

do/end

The big remaining question on Ruby coding style is: When should you used { } for blocks, and when should you use do/end? Blocks in Ruby may be written with brace delimeters or do/end delimiters. There is a subtle difference in precedence between the two versions, but for most work the two are identical. So which way do you go? Some folk use { } for one-liners and do/end for multi-liners. Others stick exclusively to either { } or do/end. I tried all of the above, but was never really satisified with any of the guidelines. Here is the guideline I use now: Use { } for blocks that return values Use do / end for blocks that are executed for side effects This has the advantage of using the choice of block delimiter to convey a little extra information. Here’s some examples. # block used only for side effect list.each do |item| puts item end # Block used to return test value list...

Full article: http://onestepback.org/index.cgi/Tech/Ruby/BraceVsDoEnd.rdoc

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@rkneufeld » 12 Mar '12, 4pm
A coworker was wondering about braces vs do/end block styling in ruby and I mentioned the Weirich style. Link for ref: [link]
@brian_pearce » 11 Mar '12, 8am
Only 2 minutes in to @avdi's Objects on Rails and learning something new already. The "Weirich Convention" - [link]
@localshred » 07 Mar '12, 6pm
I think I'm finally starting to love the @jimweirich approach to blocks: Braces if return matters, do/end if it doesn't [link]
@jamie_gaskins » 26 Feb '12, 2am
Just realized that my preference for parens vs no parens in Ruby mirror's @jimweirich's braces vs do/end: [link]
@ayrtonbe » 16 Feb '12, 8pm
am liking this code guideline "Braces Vs Do/End" - [link]
@avdi » 13 Feb '12, 5pm
Thank you to @dchelimsky for pointing out this post from @jimweirich on his {} vs. do/end convention back in 2004: [link]
@angelaharms » 13 Feb '12, 3am
@eraserhd We were just talking about this. What do you think? [link]
@dchelimsky » 13 Feb '12, 3am
@angelaharms @dbrady @JEG2 @avdi @suss @wycats [link] /cc @jimweirich
@joshsusser » 12 Feb '12, 11pm
@timocratic the @jimweirich rule is use {/} when consuming the value the block returns, do/end otherwise [link]

Braces Vs Do/End - { |one, step, back| }

do/end

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