Results for: "module_function"

Returns true if field 'Transfer-Encoding' exists and has value 'chunked', false otherwise; see Transfer-Encoding response header:

res = Net::HTTP.get_response(hostname, '/todos/1')
res['Transfer-Encoding'] # => "chunked"
res.chunked?             # => true

Zlib::GzipReader wrapper that unzips data.

@param [Array<Object>] binding_requirements array of requirements that combine to create a conflict @return [Array<UnwindDetails>] array of UnwindDetails that have a chance

of resolving the passed requirements

Deletes an element from self, per the given Integer index.

When index is non-negative, deletes the element at offset index:

a = [:foo, 'bar', 2]
a.delete_at(1) # => "bar"
a # => [:foo, 2]

If index is too large, returns nil.

When index is negative, counts backward from the end of the array:

a = [:foo, 'bar', 2]
a.delete_at(-2) # => "bar"
a # => [:foo, 2]

If index is too small (far from zero), returns nil.

Removes each element in +self+ for which the block returns a truthy value;
returns +self+:

  a = [:foo, 'bar', 2, 'bat']
  a.delete_if {|element| element.to_s.start_with?('b') } # => [:foo, 2]

Returns a new \Enumerator if no block given:

  a = [:foo, 'bar', 2]
  a.delete_if # => #<Enumerator: [:foo, "bar", 2]:delete_if>

3

Returns a new Array containing zero or more leading elements of self; does not modify self.

With a block given, calls the block with each successive element of self; stops if the block returns false or nil; returns a new Array containing those elements for which the block returned a truthy value:

a = [0, 1, 2, 3, 4, 5]
a.take_while {|element| element < 3 } # => [0, 1, 2]
a.take_while {|element| true } # => [0, 1, 2, 3, 4, 5]
a # => [0, 1, 2, 3, 4, 5]

With no block given, returns a new Enumerator:

[0, 1].take_while # => #<Enumerator: [0, 1]:take_while>

Returns a new Array containing zero or more trailing elements of self; does not modify self.

With a block given, calls the block with each successive element of self; stops if the block returns false or nil; returns a new Array omitting those elements for which the block returned a truthy value:

a = [0, 1, 2, 3, 4, 5]
a.drop_while {|element| element < 3 } # => [3, 4, 5]

With no block given, returns a new Enumerator:

[0, 1].drop_while # => # => #<Enumerator: [0, 1]:drop_while>

Returns the number of bits of the value of int.

“Number of bits” means the bit position of the highest bit which is different from the sign bit (where the least significant bit has bit position 1). If there is no such bit (zero or minus one), zero is returned.

I.e. this method returns ceil(log2(int < 0 ? -int : int+1)).

(-2**1000-1).bit_length   #=> 1001
(-2**1000).bit_length     #=> 1000
(-2**1000+1).bit_length   #=> 1000
(-2**12-1).bit_length     #=> 13
(-2**12).bit_length       #=> 12
(-2**12+1).bit_length     #=> 12
-0x101.bit_length         #=> 9
-0x100.bit_length         #=> 8
-0xff.bit_length          #=> 8
-2.bit_length             #=> 1
-1.bit_length             #=> 0
0.bit_length              #=> 0
1.bit_length              #=> 1
0xff.bit_length           #=> 8
0x100.bit_length          #=> 9
(2**12-1).bit_length      #=> 12
(2**12).bit_length        #=> 13
(2**12+1).bit_length      #=> 13
(2**1000-1).bit_length    #=> 1000
(2**1000).bit_length      #=> 1001
(2**1000+1).bit_length    #=> 1001

This method can be used to detect overflow in Array#pack as follows:

if n.bit_length < 32
  [n].pack("l") # no overflow
else
  raise "overflow"
end

Imports methods from modules. Unlike Module#include, Refinement#import_methods copies methods and adds them into the refinement, so the refinement is activated in the imported methods.

Note that due to method copying, only methods defined in Ruby code can be imported.

module StrUtils
  def indent(level)
    ' ' * level + self
  end
end

module M
  refine String do
    import_methods StrUtils
  end
end

using M
"foo".indent(3)
#=> "   foo"

module M
  refine String do
    import_methods Enumerable
    # Can't import method which is not defined with Ruby code: Enumerable#drop
  end
end

Returns a copy of self with leading substring prefix removed:

'hello'.delete_prefix('hel')      # => "lo"
'hello'.delete_prefix('llo')      # => "hello"
'тест'.delete_prefix('те')        # => "ст"
'こんにちは'.delete_prefix('こん')  # => "にちは"

Related: String#delete_prefix!, String#delete_suffix.

Returns a copy of self with trailing substring suffix removed:

'hello'.delete_suffix('llo')      # => "he"
'hello'.delete_suffix('hel')      # => "hello"
'тест'.delete_suffix('ст')        # => "те"
'こんにちは'.delete_suffix('ちは')  # => "こんに"

Related: String#delete_suffix!, String#delete_prefix.

Like String#delete_prefix, except that self is modified in place. Returns self if the prefix is removed, nil otherwise.

Like String#delete_suffix, except that self is modified in place. Returns self if the suffix is removed, nil otherwise.

Calls the given block with each successive codepoint from self; each codepoint is the integer value for a character; returns self:

'hello'.each_codepoint {|codepoint| print codepoint, ' ' }
print "\n"
'тест'.each_codepoint {|codepoint| print codepoint, ' ' }
print "\n"
'こんにちは'.each_codepoint {|codepoint| print codepoint, ' ' }
print "\n"

Output:

104 101 108 108 111
1090 1077 1089 1090
12371 12435 12395 12385 12399

Returns an enumerator if no block is given.