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How to use sed to remove the last n lines of a file
I want to remove some n lines from the end of a file. Can this be done using sed?
22 Answers
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Creating your own header file in C
... I was wondering if you could elaborate on how to compile with all required files and not have to include foo.c into gcc program argument. What is this technique called or what program can accomplish this outside of IDE - Make comes to my mind
– nf071590
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select * vs select column
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It always pulls a tuple (except in cases where the table has been vertically segmented - broken up into columns pieces), so, to answer the question you asked, it doesn't matter from a performance perspective. However, for many other reasons, (below) you should always select specifically those co...
Concurrent HashSet in .NET Framework?
...ass.
private ConcurrentBag<string> _data;
Self-implementation
Finally, as you did, you can implement your own data type, using lock or other ways that the .NET provides you to be thread-safe. Here is a great example: How to implement ConcurrentHashSet in .Net
The only drawback of this sol...
How to create a directory if it doesn't exist using Node.js?
...? The code will continue as if there was a directory and probably throw an error later, when it tries writing to files in it. The answer by @josh3736 is much more complete and totally underrated.
– Benni
Jan 15 '19 at 7:59
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使用std::string作为std::map的key出错解决 - C/C++ - 清泛网 - 专注C/C++及内核技术
...gram files (x86) microsoft visual studio 11.0 vc include xstddef(180): error C2784: bool std::operator <(const st...c:\program files (x86)\microsoft visual studio 11.0\vc\include\xstddef(180): error C2784: “bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)”: 未...
Remove Identity from a column in a table
...T ALL
COMMIT TRAN
END TRY
BEGIN CATCH
ROLLBACK TRAN
SELECT ERROR_MESSAGE ()
END CATCH
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Proper way to handle multiple forms on one page in Django
... @meteorainer if you use number one, is there a way to pass the errors back to the forms in the parent view that instantiates these, without using either the messages framework or query strings? This answer seems the closest, but here it's still just one view handling both forms: stackove...
Execute command on all files in a directory
... This is the correct way to process files. Using a for loop is error-prone due to many reasons. Also sorting can be done by using other commands such as stat and sort, which of-course dependes on what is sorting criteria.
– tuxdna
Dec 25 '13 at 8:10...
How to use QueryPerformanceCounter?
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#include <windows.h>
double PCFreq = 0.0;
__int64 CounterStart = 0;
void StartCounter()
{
LARGE_INTEGER li;
if(!QueryPerformanceFrequency(&li))
cout << "QueryPerformanceFrequency failed!\n";
PCFreq = double(li.QuadPart)/1000.0;
QueryP...