Module: Enumerable

Included in:
NRSER::Sys::Env::Path
Defined in:
lib/nrser/core_ext/enumerable.rb,
lib/nrser/core_ext/enumerable/find_map.rb

Overview

Instance methods to extend Enumerable.

Instance Method Summary collapse

Instance Method Details

#assoc_by(*args, &block) ⇒ Object

See NRSER.assoc_by



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# File 'lib/nrser/core_ext/enumerable.rb', line 22

def assoc_by *args, &block
  NRSER.assoc_by self, *args, &block
end

#assoc_to(*args, &block) ⇒ Object

See NRSER.assoc_to



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# File 'lib/nrser/core_ext/enumerable.rb', line 28

def assoc_to *args, &block
  NRSER.assoc_to self, *args, &block
end

#count_by(&block) ⇒ Object

See NRSER.count_by



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# File 'lib/nrser/core_ext/enumerable.rb', line 52

def count_by &block
  NRSER.count_by self, &block
end

#enumerate_as_values ⇒ Object

See NRSER.enumerate_as_values



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# File 'lib/nrser/core_ext/enumerable.rb', line 34

def enumerate_as_values
  NRSER.enumerate_as_values self
end

#find_bounded(bounds, &block) ⇒ Object

See NRSER.find_bounded



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# File 'lib/nrser/core_ext/enumerable.rb', line 10

def find_bounded bounds, &block
  NRSER.find_bounded self, bounds, &block
end

#find_map(ifnone = nil, &block) ⇒ nil, ...

Find the first truthy (not ‘nil` or `false`) result of calling `&block` on entries.

Like #find, accepts an optional ‘ifnone` procedure to call if no match is found.

Examples:


[1, 2, 3, 4].find_map do |i|
  if i.even?
    "#{ i } is even!"
  end
end
# => "2 is even!"

Parameters:

  • ifnone (nil | Proc<()=>DEFAULT>) (defaults to: nil) —

    Optional lambda to call for the return value when no match is found.

  • block (Proc<(E)=>RESLUT>) —

    Block mapping entires to results.

Returns:

  • (nil) —

    When ‘block.call( E )` is `nil` or `false` for all entries `E` and `ifnone` is `nil` or not provided.

  • (V) —

    When ‘block.call( E )` is `nil` or `false` for all entries `E` and `ifnone` is a lambda that returns `DEFAULT`.

  • (RESULT) —

    The first result ‘RESLUT = block.call( E )` where `RESLUT` is not `nil` or `false`.

  • (DEFAULT) —

    When ‘ifnone` procedure is provided and `&block` returns `nil` or `false` for all entries.

  • (nil) —

    When ‘ifnone` procedure is not provided and `&block` returns `nil` or `false` for all entries.



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# File 'lib/nrser/core_ext/enumerable/find_map.rb', line 44

def find_map ifnone = nil, &block
  each do |entry|
    if result = block.call( entry )
      # Found a match, short-circuit
      return result
    end
  end
  
  # No matches, return `ifnone`
  ifnone.call if ifnone
end

#find_only(&block) ⇒ Object

See NRSER.find_only



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# File 'lib/nrser/core_ext/enumerable.rb', line 16

def find_only &block
  NRSER.find_only self, &block
end

#only(**options) ⇒ Object

Calls NRSER.only on ‘self`.



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# File 'lib/nrser/core_ext/enumerable.rb', line 40

def only **options
  NRSER.only self, **options
end

#only! ⇒ Object

See NRSER.only!



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# File 'lib/nrser/core_ext/enumerable.rb', line 46

def only!
  NRSER.only! self
end

#slice?(*args, &block) ⇒ Boolean

See NRSER.slice?

Returns:

  • (Boolean) 


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# File 'lib/nrser/core_ext/enumerable.rb', line 64

def slice? *args, &block
  NRSER.slice? self, *args, &block
end

#try_find(&block) ⇒ Object

See NRSER.try_find



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# File 'lib/nrser/core_ext/enumerable.rb', line 58

def try_find &block
  NRSER.try_find self, &block
end