Class: Object

Inherits:
BasicObject
Defined in:
lib/tinyext/core/tap.rb,
lib/tinyext/core/try.rb,
lib/tinyext/core/blank.rb

Overview

TAKEN FROM ACTIVE SUPPORT

Instance Method Summary collapse

Instance Method Details

#blank? ⇒ Boolean

An object is blank if it’s false, empty, or a whitespace string. For example, “”, “ ”, nil, [], and {} are blank.

This simplifies

if !address.nil? && !address.empty?

to

if !address.blank?

Returns:

  • (Boolean) 


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# File 'lib/tinyext/core/blank.rb', line 13

def blank?
  respond_to?(:empty?) ? empty? : !self
end

#present? ⇒ Boolean

An object is present if it’s not blank.

Returns:

  • (Boolean) 


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# File 'lib/tinyext/core/blank.rb', line 18

def present?
  !blank?
end

#tap {|_self| ... } ⇒ Object

Yields x to the block, and then returns x. The primary purpose of this method is to “tap into” a method chain, in order to perform operations on intermediate results within the chain.

(1..10).tap { |x| puts "original: #{x.inspect}" }.to_a.
  tap    { |x| puts "array: #{x.inspect}" }.
  select { |x| x%2 == 0 }.
  tap    { |x| puts "evens: #{x.inspect}" }.
  map    { |x| x*x }.
  tap    { |x| puts "squares: #{x.inspect}" }

Yields:

  • (_self)

Yield Parameters:

  • _self (Object) —

    the object that the method was called on



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# File 'lib/tinyext/core/tap.rb', line 13

def tap
  yield self
  self
end