Class: Array

Inherits:
Object
  • Object
show all
Defined in:
lib/clearbooks/core_ext/array.rb

Class Method Summary collapse

Class Method Details

.%(len) ⇒ Object

now e.g. this is possible

“foo0”, “foo1”, “foo2”, “foo3”, “foo4”, “foo5”, “foo6”, “foo7”, “foo8”, “foo9”, “foo10”
[“foo0”, “foo1”, “foo2”], [“foo3”, “foo4”, “foo5”], [“foo6”, “foo7”, “foo8”], [“foo9”, “foo10”] 


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# File 'lib/clearbooks/core_ext/array.rb', line 28

def %(len)
  inject([]) do |array, x|
    array << [] if [*array.last].nitems % len == 0
    array.last << x
    array
  end
end

.delete_unless(&block) ⇒ Object 



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# File 'lib/clearbooks/core_ext/array.rb', line 13

def delete_unless &block
  delete_if{ |element| not block.call( element ) }
end

.mean ⇒ Object 



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# File 'lib/clearbooks/core_ext/array.rb', line 43

def mean
  sum / size
end

.sum ⇒ Object 



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# File 'lib/clearbooks/core_ext/array.rb', line 37

def sum
  inject( nil ) { |sum,x| sum ? sum+x : x }
end