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STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...定义一个结构体来试试：[cpp]view plaincopystructa{char*pName;intm_a;} 引言
STL的map容器中，key的类型是不是随意的呢？
实践
编写测试代码
定义一个结构体来试试：
struct a
{
char* pName;
int m_a;
};
...
map<a, int> mp;
a ...
Python: What OS am I running on?
...consistent output. i.e. platform.system() returns "Windows" instead of "win32". sys.platform also contains "linux2" on old versions of Python while it contains just "linux" on newer ones. platform.system() has always returned just "Linux".
– erb
Jun 9 '17 at 10...
to_string is not a member of std, says g++ (mingw)
...e MinGW-w64 project. Despite the name, the project provides toolchains for 32-bit along with 64-bit. The Nuwen MinGW distro also solves this issue.
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How can I select rows with most recent timestamp for each key value?
...
Jamie MarshallJamie Marshall
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add a com...
Automate ssh-keygen -t rsa so it does not ask for a passphrase
...ing prompted for a passphrase you can do the following:
$ ssh-keygen -f id_rsa -t rsa -N ''
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Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?
... Eliahu Aaron
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answered Feb 29 '12 at 19:39
StevenSteven
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Iterating over Java collections in Scala
...ares the appropriate conversions.
import scala.collection.JavaConversions._
This won't work in previous versions though.
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What is time_t ultimately a typedef to?
...mpliant systems implement the time_t type as a signed
integer (typically 32 or 64 bits wide)
which represents the number of seconds
since the start of the Unix epoch:
midnight UTC of January 1, 1970 (not
counting leap seconds). Some systems
correctly handle negative time values,
while ...
Convert tuple to list and back
...
List to Tuple and back can be done as below
import ast, sys
input_str = sys.stdin.read()
input_tuple = ast.literal_eval(input_str)
l = list(input_tuple)
l.append('Python')
#print(l)
tuple_2 = tuple(l)
# Make sure to name the final tuple 'tuple_2'
print(tuple_2)
...
Replace console output in Python
...ce.
– felipsmartins
Feb 6 '17 at 18:32
Voted for only first 2 lines of code. The progress bar part is becoming slow in...