bitmask

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Regarding bit masking in C. Why (~(~0 << N)) is preferred than ((1 << N) -1)?

I do know that ~0 will eva开发者_Python百科luate the maximum word sized bit 1s (and thus takes caring of portability), but I am still not getting why ((1 << N) - 1) is discouraged?[详细]

2023-04-11 09:40 分类：问答
C# bitmask validation

I have a small problem with bitmask validation as below: ... if (BitExist(\"52\",\"0x20\")) { //do something[详细]

2023-04-10 18:25 分类：问答
Why do I continue to receive PHP Deprecated errors despite this ini setting?

I\'ve set my error_reporting to error_reporting = E_ALL & ~E_DEPRECATED ^ E_STRICT in php.ini. The numerical value according to phpinfo() is 22527.[详细]

2023-04-10 04:20 分类：问答
Determine which bit is set, for a date, using complex bit masks

I have a bit shift mask that represents days in a week: Sunday = 1 Monday = 2 Tuesday = 4 ... Saturday = 64[详细]

2023-04-09 04:30 分类：问答
Java Bitmasks and Login Security

Ok i dont really understand how this loop works, its the logic statement that bugs me the most. permissions is a constant value which I have assigned 127. Roles.java contains constant values that dete[详细]

2023-04-03 07:42 分类：问答
How to avoid sign extending bit mask in Java?

My bit masks are bytes, and I\'d like to keep them exactly as they are, but I think they\'re sign extended.I don\'t care if the byte is considered positive or negative, as long as it has the same bits[详细]

2023-03-26 07:14 分类：问答
What is the difference between -1 and ~0

The title really says it all: what is the difference between minus one and tilda (ones-complement) zero?[详细]

2023-03-21 15:56 分类：问答
Bit Mask Question

Readng the documentation for a point of sale system, here is the example they give for a mask that is supposed to tell you what seats are selected. I开发者_运维知识库 can\'t figure this out. I complet[详细]

2023-03-11 12:52 分类：问答
Bitwise, bitmasking: whats wrong here?

I wanted to track some options via bitmask\'ing them, and borrowed bitmask values from this answer,开发者_如何转开发 yet they not seem to work together.[详细]

2023-03-11 01:44 分类：问答
problem with bitmask and javascript

I am not sure if I am doing something wrong, but I can\'t seem to have this simple javascript to work:[详细]

2023-02-27 08:04 分类：问答