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Is there a method to generate a UUID with go language
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u[8] = (u[8] | 0x80) & 0xBF // what's the purpose ?
u[6] = (u[6] | 0x40) & 0x4F // what's the purpose ?
These lines clamp the values of byte 6 and 8 to a specific range. rand.Read returns random bytes in the range 0-255, which are not all valid...
Equation (expression) parser with precedence?
...veloped an equation parser using a simple stack algorithm that will handle binary (+, -, |, &, *, /, etc) operators, unary (!) operators, and parenthesis.
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Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
I'm having a little trouble understanding the pass-by-reference properties of data.table . Some operations seem to 'break' the reference, and I'd like to understand exactly what's happening.
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In Java, how do I call a base class's method from the overriding method in a derived class?
I have two Java classes: B, which extends another class A, as follows :
12 Answers
12
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JavaScript: How to join / combine two arrays to concatenate into one array? [duplicate]
I'm trying to combine 2 arrays in javascript into one.
1 Answer
1
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Convert the values in a column into row names in an existing data frame
...he values in a column of an existing data frame into row names. Is is possible to do this without exporting the data frame and then reimporting it with a row.names = call?
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How to save a list as numpy array in python?
Is possible to construct a NumPy array from a python list?
9 Answers
9
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NodeJS: How to decode base64 encoded string back to binary? [duplicate]
I was implementing password hashing with salt, so I generated salt as binary, hashed the password, base64 encoded the password and salt then stored them into database.
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C/C++ 如何向上取整？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...方法：#include <math.h>int _tmain(int argc, _TCHAR* argv[]){int a = 6, b = 5; ceil函数printf("%d...一般地，向上取整有两种方法：
#include <math.h>
int _tmain(int argc, _TCHAR* argv[])
{
int a = 6, b = 5;
//ceil函数
printf("%d\n", (int)ceil((double)a / (double)b));...