Hi,
If my number is 1111, I would like to had 0000.
If my number is 1001, I would like to had 0110.
If my number is 0011, I would like to had 1100.
Of cours I know we can use XOR operator, but I would like to allow Ruby
to do it more simply, just by using a function as simple as possible. I
a sure this kind of function is yet setup in Ruby, but I don't know what
is his name.
Thank you for help.
Zang
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Posted via http://www.ruby-forum.com/.
A solution:
irb(main):003:0> "0011".tr("01", "10")
=> "1100"
-- fxn
On Aug 14, 2007, at 4:42 PM, Zangief Ief wrote:
If my number is 1111, I would like to had 0000.
If my number is 1001, I would like to had 0110.
If my number is 0011, I would like to had 1100.Of cours I know we can use XOR operator, but I would like to allow Ruby
to do it more simply, just by using a function as simple as possible. I
a sure this kind of function is yet setup in Ruby, but I don't know what
is his name.
Xavier Noria wrote:
irb(main):003:0> "0011".tr("01", "10")
=> "1100"
Or, if you're working with integers (as opposed to strings), then you
can use the bitwise negation operator (~) and avoid the overhead of
string conversions altogether:
>> 0b1010
=> 10
>> ~0b1010
=> -11
>> ~(~0b1010)
=> 10
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Posted via http://www.ruby-forum.com/.
Zangief Ief wrote:
If my number is 1111, I would like to had 0000.
If my number is 1001, I would like to had 0110.
If my number is 0011, I would like to had 1100.
Thanks
sprintf("%04d", 1111- 1111) -> 0000
sprintf("%04d", 1111- 1011) -> 0100
sprintf("%04d", 1111- 1001) -> 0110
sprintf("%04d", 1111- 0011) -> 1102 (oops - it treats the second
value as octal)
sprintf("%04d", 1111- "0011".to_i) -> 1100
Todd
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