Ruby_through_Reserved_Words.pdf

Transcript

1. 1.

   Powered by Rabbit 2.2.1 Ruby through Reserved Words Heroku Ruby

   Association Yukihiro "Matz" Matsumoto まつもとゆきひろ @yukihiro_matz
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   Powered by Rabbit 2.2.1 　 Ruby has 41 reserved words

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   Powered by Rabbit 2.2.1 　 Each reflects (early) design decisions

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   Powered by Rabbit 2.2.1 　 The story behinds the words

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   Powered by Rabbit 2.2.1 　 begin/end

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   Powered by Rabbit 2.2.1 　 Comb Style Indentation

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   Powered by Rabbit 2.2.1 　 Inherited from Eiffel

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   Powered by Rabbit 2.2.1 　 along with rescue, ensure, retry

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   Powered by Rabbit 2.2.1 　 break/next/redo

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    Powered by Rabbit 2.2.1 　 not continue

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    Powered by Rabbit 2.2.1 　 From Perl (shorter)

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    Powered by Rabbit 2.2.1 　 class/def

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    Powered by Rabbit 2.2.1 　 From Python

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    Powered by Rabbit 2.2.1 　 module

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    Powered by Rabbit 2.2.1 　 Lisp (Flavors)

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    Powered by Rabbit 2.2.1 　 Mix-in

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    Powered by Rabbit 2.2.1 　 if/else/elsif

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    Powered by Rabbit 2.2.1 　 elsif

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    Powered by Rabbit 2.2.1 　 elseif, elif, elsif

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    Powered by Rabbit 2.2.1 　 The shortest pronounceable

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    Powered by Rabbit 2.2.1 　 then

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    Powered by Rabbit 2.2.1 　 The stop words

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    Powered by Rabbit 2.2.1 　 then and class methods

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    Powered by Rabbit 2.2.1 　 unless

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    Powered by Rabbit 2.2.1 　 From Perl

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    Powered by Rabbit 2.2.1 　 No elsif or elsunless

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    Powered by Rabbit 2.2.1 　 while

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    Powered by Rabbit 2.2.1 　 Simple loop

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    Powered by Rabbit 2.2.1 　 for/in

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    Powered by Rabbit 2.2.1 　 From Python?

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    Powered by Rabbit 2.2.1 　 until

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    Powered by Rabbit 2.2.1 　 From Perl

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    Powered by Rabbit 2.2.1 　 true/false/nil

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    Powered by Rabbit 2.2.1 　 Truthy and Falsy

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    Powered by Rabbit 2.2.1 　 Three value model

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    Powered by Rabbit 2.2.1 　 Inspired by Lisp

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    Powered by Rabbit 2.2.1 　 and/or/not

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    Powered by Rabbit 2.2.1 　 From Perl

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    Powered by Rabbit 2.2.1 　 Only for precedence

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    Powered by Rabbit 2.2.1 　 do/yield

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    Powered by Rabbit 2.2.1 　 The block

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    Powered by Rabbit 2.2.1 　 From CLU (1970s, MIT)

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    Powered by Rabbit 2.2.1 　 The biggest invention of Ruby

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    Powered by Rabbit 2.2.1 　 rescue/ensure/retry

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    Powered by Rabbit 2.2.1 　 Exception handling

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    Powered by Rabbit 2.2.1 　 Inspired by Eiffel

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    Powered by Rabbit 2.2.1 　 Icon (1970s, U of Arizona)

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    Powered by Rabbit 2.2.1 　 Success/Failure model

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    Powered by Rabbit 2.2.1 　 return

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    Powered by Rabbit 2.2.1 　 From C

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    Powered by Rabbit 2.2.1 　 Multiple values (Tuple)

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    Powered by Rabbit 2.2.1 　 self/super

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    Powered by Rabbit 2.2.1 　 Smalltalk

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    Powered by Rabbit 2.2.1 　 alias/undef

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    Powered by Rabbit 2.2.1 　 From Sather (1980s, UCB)

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    Powered by Rabbit 2.2.1 　 BEGIN/END

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    Powered by Rabbit 2.2.1 　 From Awk

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    Powered by Rabbit 2.2.1 　 Not recommendation anymore

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    Powered by Rabbit 2.2.1 　 __FILE__/__LINE__

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    Powered by Rabbit 2.2.1 　 From C (cpp)

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    Powered by Rabbit 2.2.1 　 __ENCODING__

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    Powered by Rabbit 2.2.1 　 From Ruby1.9 (encoding)

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    Powered by Rabbit 2.2.1 　 UCS vs CSI

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    Powered by Rabbit 2.2.1 　 Unicode

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    Powered by Rabbit 2.2.1 　 BDFL

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    Powered by Rabbit 2.2.1 　 Benevolent Dictator For Life

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    Powered by Rabbit 2.2.1 　 How to make decisions

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    Powered by Rabbit 2.2.1 　 Scope Background Motivation

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    Powered by Rabbit 2.2.1 　 Committee

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    Powered by Rabbit 2.2.1 　 Voting

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    Powered by Rabbit 2.2.1 　 A ship would climb a

    mountain with many captains
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    Powered by Rabbit 2.2.1 　 too many cooks spoil the

    broth