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[ruby/en] Reflow comments (#5180)
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@ -259,8 +259,8 @@ else
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'else, also optional'
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end
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# If a condition controls invocation of a single statement rather than a block of code
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# you can use postfix-if notation
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# If a condition controls invocation of a single statement rather than a block
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# of code you can use postfix-if notation
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warnings = ['Patronimic is missing', 'Address too short']
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puts("Some warnings occurred:\n" + warnings.join("\n")) if !warnings.empty?
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@ -279,9 +279,10 @@ for counter in 1..5
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puts "iteration #{counter}"
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end
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# The `do |variable| ... end` construct above is called a 'block'. Blocks are similar
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# to lambdas, anonymous functions or closures in other programming languages. They can
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# be passed around as objects, called, or attached as methods.
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# The `do |variable| ... end` construct above is called a 'block'. Blocks are
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# similar to lambdas, anonymous functions or closures in other programming
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# languages. They can be passed around as objects, called, or attached as
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# methods.
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#
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# The 'each' method of a range runs the block once for each element of the range.
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# The block is passed a counter as a parameter.
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@ -415,19 +416,20 @@ surround { puts 'hello world' }
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#=> hello world
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#=> }
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# Blocks can be converted into a 'proc' object, which wraps the block
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# and allows it to be passed to another method, bound to a different scope,
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# or manipulated otherwise. This is most common in method parameter lists,
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# where you frequently see a trailing '&block' parameter that will accept
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# the block, if one is given, and convert it to a 'Proc'. The naming here is
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# convention; it would work just as well with '&pineapple'.
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# Blocks can be converted into a 'proc' object, which wraps the block and allows
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# it to be passed to another method, bound to a different scope, or manipulated
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# otherwise. This is most common in method parameter lists, where you frequently
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# see a trailing '&block' parameter that will accept the block, if one is given,
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# and convert it to a 'Proc'. The naming here is convention; it would work just
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# as well with '&pineapple'.
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def guests(&block)
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block.class #=> Proc
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block.call(4)
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end
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# The 'call' method on the Proc is similar to calling 'yield' when a block is
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# present. The arguments passed to 'call' will be forwarded to the block as arguments.
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# present. The arguments passed to 'call' will be forwarded to the block as
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# arguments.
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guests { |n| "You have #{n} guests." }
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# => "You have 4 guests."
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@ -480,9 +482,9 @@ best *ranked_competitors
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5.even? #=> false
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5.odd? #=> true
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# By convention, if a method name ends with an exclamation mark, it does something destructive
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# like mutate the receiver. Many methods have a ! version to make a change, and
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# a non-! version to just return a new changed version.
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# By convention, if a method name ends with an exclamation mark, it does
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# something destructive like mutate the receiver. Many methods have a ! version
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# to make a change, and a non-! version to just return a new changed version.
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company_name = "Dunder Mifflin"
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company_name.upcase #=> "DUNDER MIFFLIN"
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company_name #=> "Dunder Mifflin"
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@ -516,7 +518,8 @@ class Human
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@name
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end
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# The above functionality can be encapsulated using the attr_accessor method as follows.
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# The above functionality can be encapsulated using the attr_accessor method
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# as follows.
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attr_accessor :name
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# Getter/setter methods can also be created individually like this.
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