How would you duplicate a string without using a temp variable?

Question

Anónimo · Accepted Answer

var1 = 1011
var2 = 0010

var1 = var1 xor var2     // var1 = 1001
var2 = var1 xor var2     // var2 = 1011
var1 = var1 xor var2     // var1 = 0010

var1 = 0010
var2 = 1011

Anónimo · Answer

something to do with XORing the bits

Anonymous · Answer

Maybe iterate through it with a loop? Or recurse (not sure about the latter)

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