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Call Go functions from C
I am trying to create a static object written in Go to interface with a C program (say, a kernel module or something).
4 An...
Replacing column values in a pandas DataFrame
...e this:
w['female'] = w['female'].map({'female': 1, 'male': 0})
(Here I convert the values to numbers instead of strings containing numbers. You can convert them to "1" and "0", if you really want, but I'm not sure why you'd want that.)
The reason your code doesn't work is because using ['femal...
Can I set enum start value in Java?
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Java enums are not like C or C++ enums, which are really just labels for integers.
Java enums are implemented more like classes - and they can even have multiple attributes.
public enum Ids {
OPEN(100), CLOSE(200);
private final int id;
Ids(int id) { this.id = id; }
public int g...
C# Java HashMap equivalent
Coming from a Java world into a C# one is there a HashMap equivalent? If not what would you recommend?
7 Answers
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Why sizeof int is wrong, while sizeof(int) is right?
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The following could be ambiguous:
sizeof int * + 1
Is that (sizeof (int*)) + 1, or (sizeof(int)) * (+1)?
Obviously the C language could have introduced a rule to resolve the ambiguity, but I can imagine why it didn't bother. With the language as it stands, a type...
“unpacking” a tuple to call a matching function pointer
...f values, which will later be used as arguments for a call to a function pointer which matches the stored types.
8 Answers
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How to compare 2 files fast using .NET?
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Make sure to take into account where your files are located. If you're comparing local files to a back-up half-way across the world (or over a network with horrible bandwidth) you may be better off to hash first and send a checksum over the n...
64 bit OS下int占几个字节？ - C/C++ - 清泛网 - 专注C/C++及内核技术
64 bit OS下int占几个字节？int固定4字节，不要受64 bit的混淆。int是由编程语言设计决定的，不受编译器的影响。__int64才是8位的。另外，指针是受编译器 OS影响的，3...int固定4字节，不要受64 bit的混淆。int是由编程语言设计决定的...
/usr/include/c++/4.9/bits/stl_iterator_base_types.h:165:53: error: ‘i...
/usr/include/c++/4.9/bits/stl_iterator_base_types.h:165:53: error: ‘int’ is not a class, struct, or union type先看下面的代码(来自:SO)：#include <iostream>#include <cmath>#include <vector>using namespace std;double distance(int a, in...先看下面的代码(来自: SO)：
#include <i...
What are Aggregates and PODs and how/why are they special?
...oth aggregates and PODs (Plain Old Data) take time and read it. If you are interested just in aggregates, read only the first part. If you are interested only in PODs then you must first read the definition, implications, and examples of aggregates and then you may jump to PODs but I would still rec...