Module: RubyExtendsions::ArrayExtendsions::InstanceMethods

Defined in:
lib/ruby_extendsions/array_extendsions.rb

Overview

extend ActiveSupport::Concern

Instance Method Summary collapse

Instance Method Details

#b_include?(e) ⇒ Boolean

基于二分查找的include?

Returns:

  • (Boolean) 


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# File 'lib/ruby_extendsions/array_extendsions.rb', line 57

def b_include? e
  !self.binary_search_index(e).nil?
end

#binary_search_index(e, l = 0, u = length - 1) ⇒ Object

二分查找返回数组index



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# File 'lib/ruby_extendsions/array_extendsions.rb', line 48

def binary_search_index(e, l = 0, u = length - 1)
  return if  l>u
  m=(l+u)/2
  return if !(e.class == self[m].class)
  e < self[m] ? u=m-1 : l=m+1
  e == self[m] ? m : binary_search_index(e,l,u)
end

#compare_content(com_arr) ⇒ Object

比较两个数组内容相同



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# File 'lib/ruby_extendsions/array_extendsions.rb', line 62

def compare_content com_arr
  arr = Set.new self
  com_arr = Set.new com_arr
  return arr == com_arr
end

#fill_nil(val) ⇒ Object 



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# File 'lib/ruby_extendsions/array_extendsions.rb', line 10

def fill_nil(val)
  self.inject([]) {|s, a| s << (a.nil? ? a=val : a)}
end

#fill_nil!(val) ⇒ Object 



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# File 'lib/ruby_extendsions/array_extendsions.rb', line 14

def fill_nil!(val)
  self.each_index { |i| self[i] ||= val }
end

#format_mess_insert ⇒ Object

change [[1,2,3][4,5,6]] to (‘1’,‘2’,‘3’),(‘4’,‘5’,‘6’) be used with mess insert mysql



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# File 'lib/ruby_extendsions/array_extendsions.rb', line 20

def format_mess_insert
  self.inject('') do |s,i|
    t = i.inject('(') { |x, n| x << "'#{n}'," }.chop
    s << t << '),'
  end.chop
end

#is_blank_all? ⇒ Boolean

for rails

Returns:

  • (Boolean) 


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# File 'lib/ruby_extendsions/array_extendsions.rb', line 37

def is_blank_all?
  b = true
  self.each {|i|  b = false if !i.blank? }
  return b
end

#is_nil_all? ⇒ Boolean

whether the array is all nil item like arr = [nil,nil,nil,nil] arr.is_nil_all? #=> true

Returns:

  • (Boolean) 


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# File 'lib/ruby_extendsions/array_extendsions.rb', line 30

def is_nil_all?
  b = true
  self.each {|i|  b = false if !i.nil? }
  return b
end

#random ⇒ Object

Random return an Array item



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# File 'lib/ruby_extendsions/array_extendsions.rb', line 44

def random
  return self[rand(self.size)]
end