class Each
Constants
- Filter
Attributes
filter[R]
inner_focus[R]
outer_focus[R]
Public Class Methods
new(outer_focus = nil, inner_focus = nil, filter = nil)
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# File lib/ruby-optics/each.rb, line 14 def initialize(outer_focus = nil, inner_focus = nil, filter = nil) @outer_focus = outer_focus || Lens.identity @inner_focus = inner_focus || Lens.identity @filter = filter end
with_filter(focusing_lens, &blk)
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# File lib/ruby-optics/each.rb, line 56 def self.with_filter(focusing_lens, &blk) Each.new.with_filter(focusing_lens, &blk) end
Public Instance Methods
compose_lens(lens)
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# File lib/ruby-optics/each.rb, line 48 def compose_lens(lens) Each.new( outer_focus = self.outer_focus, inner_focus = self.inner_focus.compose_lens(lens), filter = self.filter ) end
get_all(object)
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# File lib/ruby-optics/each.rb, line 36 def get_all(object) filtered(outer_focus.get(object)).map { |a| inner_focus.get(a) } end
modify_all(object, &blk)
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# File lib/ruby-optics/each.rb, line 24 def modify_all(object, &blk) outer_focus.modify(object) { |enumerable| enumerable.map { |a| if !filter.nil? filter.call(a) ? inner_focus.modify(a, &blk) : a else inner_focus.modify(a, &blk) end } } end
set(new_value, object)
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# File lib/ruby-optics/each.rb, line 20 def set(new_value, object) modify_all(object) { |_| new_value } end
with_filter(focusing_lens, &blk)
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# File lib/ruby-optics/each.rb, line 40 def with_filter(focusing_lens, &blk) Each.new( outer_focus = self.outer_focus, inner_focus = self.inner_focus, filter = Filter.new(focusing_lens, blk) ) end
Private Instance Methods
filtered(enumerable)
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# File lib/ruby-optics/each.rb, line 62 def filtered(enumerable) return enumerable if filter.nil? enumerable.select { |object| filter.call(object) } end