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How do you Encrypt and Decrypt a PHP String?
...pat.
Unless you're using an AEAD construct, ALWAYS encrypt then MAC!
bin2hex(), base64_encode(), etc. may leak information about your encryption keys via cache timing. Avoid them if possible.
Even if you follow the advice given here, a lot can go wrong with cryptography. Always have a cryptograph...
What is the string length of a GUID?
...-1234-1234-123456789abc)
Guid.NewGuid().ToString("X") => 68 characters (Hexadecimal)
outputs: {0x12345678,0x1234,0x1234,{0x12,0x34,0x12,0x34,0x56,0x78,0x9a,0xbc}}
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How do I enter RGB values into Interface Builder?
How can I enter RGB or Hex color values for backgrounds in Interface Builder? I can select predefined colors but I would like to manually enter in RGB values. Where can I do this?
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What do numbers using 0x notation mean?
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Literals that start with 0x are hexadecimal integers. (base 16)
The number 0x6400 is 25600.
6 * 16^3 + 4 * 16^2 = 25600
For an example including letters (also used in hexadecimal notation where A = 10, B = 11 ... F = 15)
The number 0x6BF0 is 27632.
6 ...
Hexadecimal To Decimal in Shell Script
Can someone help me to convert a hexadecimal number to decimal number in a shell script?
6 Answers
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Win32汇编--使用MASM - C/C++ - 清泛网 - 专注C/C++及内核技术
...，程序开始执行的时候也会自己找到main()函数。而汇编是低级语言，必须为所有的东西找到它们该去的地方，所以在DOS的汇编中，Hello World又长成了这样一副模板：
;分号后面是注释
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
What does value & 0xff do in Java?
... What does the x mean in that notation? x isn't a number or a hex number?
– Callat
Dec 5 '16 at 18:56
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What's the bad magic number error?
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Take the pyc file to a windows machine. Use any Hex editor to open this pyc file. I used freeware 'HexEdit'. Now read hex value of first two bytes. In my case, these were 03 f3.
Open calc and convert its display mode to Programmer (Scientific in XP) to see Hex and Decimal...
技术人员如何去面试？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...得我技术能力达到了某个阶段，但是目前薪水比我能力要低，或者是我一起成长的同学朋友同事现在薪水都比我高，或者是在高房价下面或者要养孩子，需要更多的收入来支撑，不管什么原因，追求高薪自然是我们在商业社会每...
How to hash a string into 8 digits?
...# Use hashlib
>>> import hashlib
>>> int(hashlib.sha1(s).hexdigest(), 16) % (10 ** 8)
58097614L
>>> # Use hash()
>>> abs(hash(s)) % (10 ** 8)
82148974
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