INTEGER.md

Integer

bit

Calculates the bit of an integer.

0.bit(4)       #=> 16
10.bit(-4)     #=> 2
0b0100.bit(-3) #=> 0

bit?

Returns if it is a bit set.

8.bit?(3) #=> true
8.bit?(2) #=> false

bit_clear

Clears a bit.

4.bit_clear(2) #=> 0

bitmask

Calculates a bitmask of an integer.

1.bitmask(6)  #=> 7
7.bitmask(~2) #=> 5

bitmask?

Returns if it is a bitmask set.

8.bitmask?(3) #=> true
8.bitmask?(2) #=> false

combinatorial

Calculates the combinatorial of an integer to another integer.

50.combinatorial(49) #=> 50
50.combinatorial(50) #=> 1
8.combinatorial(4)   #=> 70

factorial

Calculates the factorial of an integer.

0.factorial #=> 0
1.factorial #=> 1
4.factorial #=> 24

factors

Calculates all the factors of an integer.

24.factors #=> [1, 24, 2, 12, 3, 8, 4, 6]

of

Like times but returns a collection of the yield results.

3.of { |i| i + 1 } #=> ['1', '2', '3']

roman_numeral

Converts an integer to a roman_numeral numeral.

0.roman_numeral   #=> ''
49.roman_numeral  #=> 'XLIX'
-49.roman_numeral #=> '-XLIX'

to_time aka to_t

Returns a Time object for the given Integer.

3.to_time #=> '1969-12-31 19:00:03.000000000 -0500'