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c++ Programming Glossary: xorSwapping two variable value without using 3rd variable http://stackoverflow.com/questions/1826159/swapping-two-variable-value-without-using-3rd-variable this c logical share improve this question Using the xor swap algorithm void xorSwap int x int y if x y ensure that memory.. improve this question Using the xor swap algorithm void xorSwap int x int y if x y ensure that memory locations are different.. locations rather than different values . This is because p xor p 0 and if both x and y share the same memory location when..
Boolean expression (grammar) parser in c++ http://stackoverflow.com/questions/8706356/boolean-expression-grammar-parser-in-c to parse a boolean expression in C . Input form a and b xor c and d or a and b I just want to parse this expression into.. expression into a tree knowing the precedence rule not and xor or . So the above expression should look something like a and.. So the above expression should look something like a and b xor c and d or a and b to the parser. And the tree would be of form..
http://stackoverflow.com/questions/1128985/c-reverse-array word len i 1 word len i 1 temp or better yet the classic XOR implementation void reverse char word int len strlen word for..
reason why custom loop is faster? bad compiler? unsafe custom code? luck?(lucky cache hits) http://stackoverflow.com/questions/11529778/reason-why-custom-loop-is-faster-bad-compiler-unsafe-custom-code-lucklucky 2 Just for fun I wrote a new version that adds the triple XOR swap as well as one using the CPU's xchg instruction just because..
http://stackoverflow.com/questions/12313405/garbage-collection-in-c11 a safely derived pointer so making certain operations like XOR ing pointer values becomes undefined behavior and the GC don't..
C++11 Garbage Collector - Why and Hows http://stackoverflow.com/questions/15157591/c11-garbage-collector-why-and-hows when you take a pointer to a dynamically allocated object XOR it with another value thereby hiding the pointer value and then..
http://stackoverflow.com/questions/1596668/logical-xor-operator-in-c with ^ and ^^. I'd be more comfortable writing my own bool XOR bool bool function instead. c operators logical share improve..
C++ unordered_map using a custom class type as the key http://stackoverflow.com/questions/17016175/c-unordered-map-using-a-custom-class-type-as-the-key a hash function is one that uses bit shifting and bitwise XOR to combine the individual hash values. For example assuming.. values for first second and third and combine them using XOR and bit shifting return hash string k.first ^ hash string k.second.. evenly distributed as possible. This can be difficult the XOR bit shifting method above is probably not a bad start. For a..
http://stackoverflow.com/questions/19730348/why-101-is-11 caret share improve this question ^ is the bitwise XOR operator so you're computing 1010 1 ^ 1011 where 1010 is 10..
How do you reverse a string in place in C or C++? http://stackoverflow.com/questions/198199/how-do-you-reverse-a-string-in-place-in-c-or-c argc 1 printf s n argv argc 1 while argc return 0 This is XOR swap thing. Take care to note that you must avoid swapping with..
What is (double (^)(int))foofoo http://stackoverflow.com/questions/3551999/what-is-double-intfoofoo ^ exactly mean in this context. Usually it is bitwise XOR. c casting block objective c blocks share improve this question..
Direct formula for summing XOR http://stackoverflow.com/questions/3932346/direct-formula-for-summing-xor formula for summing XOR I have to XOR numbers from 1 to N does there exist a direct.. formula for summing XOR I have to XOR numbers from 1 to N does there exist a direct formula for it.. 0 0 N 48 48 48 N 49 1 1 N 50 51 51 Explanation Low bit is XOR between low bit and next bit. For each bit except low bit the..
How do you set, clear and toggle a single bit in C/C++? http://stackoverflow.com/questions/47981/how-do-you-set-clear-and-toggle-a-single-bit-in-c-c the bitwise NOT operator ~ then AND it. Toggling a bit The XOR operator ^ can be used to toggle a bit. number ^ 1 x That will..
Magic number in boost::hash_combine http://stackoverflow.com/questions/4948780/magic-number-in-boosthash-combine 6 seed 2 I can see that this is deterministic. I see why a XOR is used. I bet the addition helps in mapping similar values..
MSDN HMAC-SHA1 example not working http://stackoverflow.com/questions/7547791/msdn-hmac-sha1-example-not-working causes the key value to be combined using the XOR operator with the inner string and the data. The result of the.. with the inner string and the data. The result of the XOR operation is hashed and then the target data for the HMAC pointed.. to be finished and the outer string to be combined using XOR with the key. The result of the XOR operation is hashed and..
Sequence Point - Xor Swap on Array get wrong result http://stackoverflow.com/questions/9958514/sequence-point-xor-swap-on-array-get-wrong-result I already find the issue is about sequence point Array XOR swap fails even for simple integers they may have side affect.. in java x ^ y ^ x ^ y some other issue on xor swap Weird XOR swap behavior while zeroing out data So I should avoid using..
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