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Colon (:) in Python list index [duplicate]
... Does not work with dictionaries. applying d[:5] is the eqivalent of d.__getitem__(slice(0, 5, None)). A slice is not hashable.
– Steve Zelaznik
Jul 4 '15 at 2:31
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Compile (but do not run) a Python script [duplicate]
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py_compile — Compile Python source files
import py_compile
py_compile.compile('my_script.py')
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How do you calculate program run time in python? [duplicate]
...d what you wanted to time): print timeit.timeit('myOwnFunc()', setup='from __main__ import myOwnFunc', number=1). Without the setup parameter, it will complain that it could not find myOwnFunc.
– Landshark666
Dec 24 '12 at 4:13
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Remove duplicate entries using a Bash script [duplicate]
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Perl one-liner similar to @kev's awk solution:
perl -ne 'print if ! $a{$_}++' input
This variation removes trailing whitespace before comparing:
perl -lne 's/\s*$//; print if ! $a{$_}++' input
This variation edits the file in-place:
perl -i -ne 'print if ! $a{$_}++' input
This variation e...
Get current URL path in PHP [duplicate]
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You want $_SERVER['REQUEST_URI']. From the docs:
'REQUEST_URI'
The URI which was given in order to access this page; for instance, '/index.html'.
sha...
64 bit OS下int占几个字节？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...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，不受编译器的影响。
__int64才是8位的。
另外，指...
C/C++ 如何向上取整？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...上取整？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...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
prin...
error C2664:...No user-defined-conversion operator available that can ...
...can perform this conversion, or the operator cannot be callederror C2664: '__thiscall std::list<int,class std::allocator<int> >::std::list<int,class std::allocator<int> >(unsigned...error C2664: '__thiscall std::list<int,class std::allocator<int> >::std::list<int,class std::allocator<int> >(unsigned...
...VC\\INCLUDE\\iterator(93) : error C2039: “push_front”: 不是“std...
...VC\INCLUDE\iterator(93) : error C2039: “push_front”: 不是“std::vector”的成员...VC INCLUDE iterator(93) : error C2039: push_front:不是std::vector<_Ty>的成员 with [ _Ty=int ]错误代码：int ia[] = {1......VC\INCLUDE\iterator(93) : error C2039: “push_front”: 不是“std:...
MFC SetCursor设置手型鼠标光标 - C/C++ - 清泛网 - 专注C/C++及内核技术
...部分代码如下：void CxxxDlg::OnMouseMove(UINT nFlags, CPoint point){__super::OnMouseMove(nFlags, point);int...设置手型鼠标光标，部分代码如下：
void CxxxDlg::OnMouseMove(UINT nFlags, CPoint point)
{
__super::OnMouseMove(nFlags, point);
int nIndex = HitTest(point);
if...