Ruby class Integer interactive

→ Click to get an interactive sample (type in code)

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

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

Converting

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

Integer.sqrt(9)

3

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

Integer.try_convert(1.25)

1

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

11 % 3

2

&format('%04b',0b1010 & 0b1100) # 8;"0100" Documentation Playground

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

0100

*2 * 3 # 6 Documentation Playground

2 * 3

6

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

3 ** 2

9

pow3.pow(2) # 9 Documentation Playground

3.pow(2)

9

+3 + 2 # 5 Documentation Playground

3 + 2

5

-3 - 2 # 1 Documentation Playground

3 - 2

1

/8 / 2 # 2 Documentation Playground

8 / 2

4

<<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

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

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

0011

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

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

0111

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

1236.round(-1)

1230

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

chr42.chr; 255.chr # *; \x00 Documentation Playground

42.chr.inspect

"*"

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

123.digits.inspect

[3, 2, 1]

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;1.33;-4.5 Documentation Playground

9.fdiv(3)

3

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) # 3;-3 Documentation Playground

4.remainder

3

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

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"

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]