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: / opt / alt / ruby34 / share / ri / system / Integer /
Filename : bit_length-i.ri
back
U:RDoc::AnyMethod[iI"bit_length:ETI"Integer#bit_length;TF:publico:RDoc::Markup::Document:@parts[
o:RDoc::Markup::Paragraph;	[
I"8Returns the number of bits of the value of +self+, ;TI"8which is the bit position of the highest-order bit ;TI")that is different from the sign bit ;TI";(where the least significant bit has bit position 1). ;TI"?If there is no such bit (zero or minus one), returns zero.;To:RDoc::Markup::BlankLine�o;
;	[I"KThis method returns <tt>ceil(log2(self < 0 ? -self : self + 1))</tt>>.;T@o:RDoc::Markup::Verbatim;	[I")(-2**1000-1).bit_length   # => 1001
;TI")(-2**1000).bit_length     # => 1000
;TI")(-2**1000+1).bit_length   # => 1000
;TI"'(-2**12-1).bit_length     # => 13
;TI"'(-2**12).bit_length       # => 12
;TI"'(-2**12+1).bit_length     # => 12
;TI"&-0x101.bit_length         # => 9
;TI"&-0x100.bit_length         # => 8
;TI"&-0xff.bit_length          # => 8
;TI"&-2.bit_length             # => 1
;TI"&-1.bit_length             # => 0
;TI"&0.bit_length              # => 0
;TI"&1.bit_length              # => 1
;TI"&0xff.bit_length           # => 8
;TI"&0x100.bit_length          # => 9
;TI"'(2**12-1).bit_length      # => 12
;TI"'(2**12).bit_length        # => 13
;TI"'(2**12+1).bit_length      # => 13
;TI")(2**1000-1).bit_length    # => 1000
;TI")(2**1000).bit_length      # => 1001
;TI")(2**1000+1).bit_length    # => 1001
;T:@format0o;
;	[I"For \Integer _n_, ;TI">this method can be used to detect overflow in Array#pack:;T@o;;	[
I"if n.bit_length < 32
;TI"$  [n].pack('l') # No overflow.
;TI"
else
;TI"  raise 'Overflow'
;TI"end;T;
0:
@fileI"numeric.rb;T:0@omit_headings_from_table_of_contents_below0I"bit_length -> integer
;T0[�I"();T@8FI"Integer;TcRDoc::NormalClass00