Ruby class Integer | Chautauqua

Methods

Querying

allbits?0b1010.allbits?(0b1000) # true Documentation Playground

0b1010.allbits?(0b1000).inspect + '; ' + 0b1010.allbits?(0b1100).inspect

true; false

anybits?0b1010.anybits?(0b1100) # true Documentation Playground

0b0001.anybits?(0b0001).inspect + '; ' + 0b1100.anybits?(0b0001).inspect

true; false

nobits?0b1100.nobits?(0b0011) # true Documentation Playground

0b0001.nobits?(0b0001).inspect + '; ' + 0b1100.nobits?(0b0001).inspect

false; true

even?4.even? # true Documentation Playground

[1, 2, 3, 4].map(&:even?).inspect

[false, true, false, true]

odd?3.odd? # true Documentation Playground

[1, 2, 3, 4].map(&:odd?).inspect

[true, false, true, false]

zero?0.zero? # true Documentation Playground

3.zero?

false

integer?3.integer? # true Documentation Playground

3.integer?.inspect + '; ' + 3.0.integer?.inspect

true; false

bit_length0b1010.bit_length # 4 Documentation Playground

255.bit_length

8

size1.size # 8 (bytes,machine dependent) Documentation Playground

1.size

machine dependent

Comparing

<1 < 1 # false Documentation Playground

1 < 1

false

<=1 <= 1 # true Documentation Playground

1 <= 1

true

<=>1<=>2; 1<=>1; 2<=>1 # -1;0;1 Documentation Playground

1 <=> 2

-1

== (alias ===)1 == 1 # true Documentation Playground

1 == 1

true

>1 > 1 # false Documentation Playground

1 > 1

false

>=1 >= 1 # true Documentation Playground

1 >= 1

true

Arithmetic

+3 + 2 # 5 Documentation Playground

3 + 2

5

-3 - 2 # 1 Documentation Playground

3 - 2

1

*2 * 3 # 6 Documentation Playground

2 * 3

6

/8 / 2 # 4 Documentation Playground

8 / 2

4

% (alias modulo)11 % 3; 11.modulo(3) # 2 Documentation Playground

11 % 3

2

** (also pow)3 ** 2 # 9 Documentation Playground

3 ** 2

9

pow3.pow(2) # 9 Documentation Playground

3.pow(2)

9

div9.div(3); 9.div(4); 9.div(-2) # 3;2;-5 Documentation Playground

9.div(3)

3

fdiv9.fdiv(3);4.fdiv(3);9.fdiv(-2) # 3.0;1.33…;-4.5 Documentation Playground

9.fdiv(3)

3.0

divmod9.divmod(4); 5.divmod(-2) # [2,1];[-3,-1] Documentation Playground

9.divmod(4).inspect + '; ' + 5.divmod(-2).inspect  + '; ' + -5.divmod(2).inspect

[2, 1]; [-3, -1]; [-3, 1]

remainder11.remainder(3); -11.remainder(4) # 2;-3 Documentation Playground

11.remainder(3)

2

ceildiv7.ceildiv(2) # 4 Documentation Playground

-7.ceildiv(2)

-3

abs (alias magnitude)-5.abs # 5 Documentation Playground

-1236.abs

1236

-@-(5) # -5 Documentation Playground

n = -5
-n

5

Integer.sqrtInteger.sqrt(9) # 3 Documentation Playground

Integer.sqrt(9)

3

gcd12.gcd(8) # 4 Documentation Playground

36.gcd(60)

12

lcm12.lcm(8) # 24 Documentation Playground

4.lcm(6)

12

gcdlcm12.gcdlcm(8) # [4,24] Documentation Playground

36.gcdlcm(60)

[12, 180]

pred4.pred; -4.pred # 3;-5 Documentation Playground

4.pred

3

next (alias succ)4.next; -4.next # 5;-3 Documentation Playground

4.next

5

Bitwise

&format('%04b',0b1010 & 0b1100) # "1000" Documentation Playground

"%04b" % (0b0101 & 0b0110); format('%04b',0b0101 & 0b0110)

0100

| (bitwise)"%04b" % (0b0101 | 0b0110) # 0111 Documentation Playground

"%04b" % (0b0101 | 0b0110)

0111

^ (bitwise)"%04b" % (0b0101 ^ 0b0110) # 0011 Documentation Playground

"%04b" % (0b0101 ^ 0b0110)

0011

~ (bitwise not)~5 # -6 Documentation Playground

~0b1010

-11

<<n=0b1010; "%04b" % (n << 1) # 10100 Documentation Playground

n=0b1010
"%04b" % (n << 1)

10100

>>n=0b1010; "%04b" % (n >> 1) # 0101 Documentation Playground

n=0b1010
"%04b" % (n >> 1)

0101

[] (bits)n=0b10; n[0];n[1];n[2];n[3] # 0;1;0;0 Documentation Playground

n=0b10; n[0]

0

Rounding

round(d)1236.round(-1);-1236.round(-1) # 1240;-1240 Documentation Playground

1236.round(-1)

1240

ceil(d)1236.ceil(-1);-1236.ceil(-1) # 1240;-1230 Documentation Playground

1236.ceil(-1)

1240

floor(d)1236.floor(-1);-1236.floor(-1) # 1230;-1240 Documentation Playground

1236.floor(-1)

1230

truncate(d)1236.truncate(-1);-1236.t…(-1) # 1230;-1230 Documentation Playground

1236.truncate(-1)

1230

Converting

Integer.try_convertInteger.try_convert(1.25) # 1 Documentation Playground

Integer.try_convert(1.25)

1

chr42.chr; 255.chr # *;\xFF Documentation Playground

42.chr.inspect

"*"

digits123.digits;0.d…;-1.d… # [3,2,1];[0];Math::DomainError Documentation Playground

123.digits.inspect

[3, 2, 1]

to_f4.to_f; -4.to_f # 4.0;-4.0 Documentation Playground

4.to_f.inspect

4.0

to_s (alias inspect)4.to_s;-4.to_s;255.to_s(16) # "4";"-4";"ff" Documentation Playground

255.to_s(16).inspect

"ff"

to_i (alias to_int)4.to_i # 4 (self) Documentation Playground

4.to_i

4

to_r3.to_r # (3/1) Documentation Playground

3.to_r.inspect

(3/1)

rationalize3.rationalize # (3/1) Documentation Playground

3.rationalize.inspect

(3/1)

numerator3.numerator # 3 (self) Documentation Playground

3.numerator

3

denominator3.denominator # 1 (always) Documentation Playground

3.denominator

1

ord97.ord # 97 (self) Documentation Playground

97.ord

97

coerce1.coerce(2.5) # [2.5,1.0] Documentation Playground

1.coerce(2).inspect + '; ' + 1.coerce(2.5).inspect

[2, 1]; [2.5, 1.0]

Other

downtoa=[]; 10.downto(7) {|i| a<<i} # [10,9,8,7] Documentation Playground

a=[]; 2.downto(-3){|i| a << i}; a.inspect

[2, 1, 0, -1, -2, -3]

timesa=[]; 3.times {|i| a.push(i)} # [0,1,2] Documentation Playground

a=[]; 3.times {|i| a.push(i)}; a.inspect

[0, 1, 2]

uptoa=[]; 5.upto(8) {|i| a << i} # [5,6,7,8] Documentation Playground

a=[]; 5.upto(8) {|i| a<<i}; a.inspect

[5, 6, 7, 8]

Ruby class Integer interactive

Methods

Querying

Comparing

Arithmetic

Bitwise

Rounding

Converting

Other