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How to create a GUID/UUID in Python
....uuid4())
'f50ec0b7-f960-400d-91f0-c42a6d44e3d0'
>>> uuid.uuid4().hex
'9fe2c4e93f654fdbb24c02b15259716c'
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Add leading zeroes/0's to existing Excel values to certain length
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This works well with decimal numbers... but what about hexadecimal? I can't find a way to make leading 0s work with it...
– Shadow
Nov 23 '12 at 4:29
10
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How to compare binary files to check if they are the same?
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I ended up using hexdump to convert the binary files to there hex representation and then opened them in meld / kompare / any other diff tool. Unlike you I was after the differences in the files.
hexdump tmp/Circle_24.png > tmp/hex1.txt
h...
Hash String via SHA-256 in Java
...tes(StandardCharsets.UTF_8));
byte[] digest = md.digest();
String hex = String.format("%064x", new BigInteger(1, digest));
System.out.println(hex);
}
}
In the snippet above, digest contains the hashed string and hex contains a hexadecimal ASCII string with left zero padding.
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Why are hexadecimal numbers prefixed with 0x?
Why are hexadecimal numbers prefixed as 0x ?
I understand the usage of the prefix but I don't understand the significance of why 0x was chosen.
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Assembly code vs Machine code vs Object code?
...entation of machine code:
mov eax, 77
jmp anywhere
Machine code is pure hexadecimal code:
5F 3A E3 F1
I assume you mean object code as in an object file. This is a variant of machine code, with a difference that the jumps are sort of parameterized such that a linker can fill them in.
An assem...
int to hex string
I need to convert an int to hex string.
4 Answers
4
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服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...这种图就明白了，注意这里提到的服务器应该是业务请求接受处理的一方：
这么多状态不用都记住，只要了解到我上面提到的最常见的三种状态的意义就可以了。一般不到万不得已的情况也不会去查看网络状态，如果服务器...
Format numbers to strings in Python
...'Name: John, age: 35'
>>> i = 45
>>> 'dec: %d/oct: %#o/hex: %#X' % (i, i, i)
'dec: 45/oct: 055/hex: 0X2D'
>>> "MM/DD/YY = %02d/%02d/%02d" % (12, 7, 41)
'MM/DD/YY = 12/07/41'
>>> 'Total with tax: $%.2f' % (13.00 * 1.0825)
'Total with tax: $14.07'
>>&g...
why windows 7 task scheduler task fails with error 2147942667
...n dialogs
To get the relevant error message:
1) Convert 2147942667 to hex: 8007010B
2) Take last 4 digits (010B) and convert to decimal: 267
3) Run: net helpmsg 267
4) Result: "The directory name is invalid."
shar...