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How to split a string in Haskell?
Is there a standard way to split a string in Haskell?
13 Answers
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%d,%c,%s,%x等转换符 释义 - C/C++ - 清泛IT论坛，有思想、有深度
转换说明符
%a(%A) 浮点数、十六进制数字和p-(P-)记数法(C99)
%c 字符
%d 有符号十进制整数
%f 浮点数(包括float和doulbe)
%e(%E) 浮点数指数输出[e-(E-)记数法]
%g(%G) 浮点...
shared_ptr指针被赋值后，原指针会引用清零、自动释放。 - C/C++ - 清泛IT...
shared_ptr指针被赋值后，原指针会引用清零、自动释放。
std::shared_ptr<int> intg;
void foo(std::shared_ptr<int> p)
{
        intg = p;   // 原指针释放，存储新的智能指针
        //*(in...
When to use reinterpret_cast?
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The C++ standard guarantees the following:
static_casting a pointer to and from void* preserves the address. That is, in the following, a, b and c all point to the same address:
int* a = new int();
void* b = static_cast<void*>(...
Should we pass a shared_ptr by reference or by value?
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This question has been discussed and answered by Scott, Andrei and Herb during Ask Us Anything session at C++ and Beyond 2011. Watch from 4:34 on shared_ptr performance and correctness.
Shortly, there is no reason to pass by value, unless the goal is to sha...
What is the curiously recurring template pattern (CRTP)?
...ts specialization for any type X will be inherited from singleton<X> and thus will have all its (public, protected) members accessible, including the GetInstance! There are other useful uses of CRTP. For example, if you want to count all instances that currently exist for your class, but want ...
Convert to/from DateTime and Time in Ruby
How do you convert between a DateTime and a Time object in Ruby?
6 Answers
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Why does this method print 4?
I was wondering what happens when you try to catch an StackOverflowError and came up with the following method:
7 Answers
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Code Golf - π day
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In dc: 88 and 93 93 94 96 102 105 129 138 141 chars
Just in case, I am using OpenBSD and some supposedly non-portable extensions at this point.
93 chars. This is based on same formula as FORTRAN solution (slightly different results t...
Set object property using reflection
...t can't be set.
Another approach is to get the metadata for the property, and then set it. This will allow you to check for the existence of the property, and verify that it can be set:
using System.Reflection;
MyObject obj = new MyObject();
PropertyInfo prop = obj.GetType().GetProperty("Name", Bi...