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Homework and Emergencies Homework & Coursework Questions Command combination for displaying header and content Post 302914580 by [MA]Flying_Meat on Tuesday 26th of August 2014 06:21:23 PM
Old 08-26-2014
True enough. man pages are your friend. As stated previously, might as well start at the start.
Code:
man man

. You can scroll with the up and down arrows on your keyboard.

For instance, I have two terminal windows open as I experiment with your problem. One I'm using for a man page, so I can look at it frequently and easily. The other I'm issuing commands in, to replicate the problem and experiment with finding a solution.

Sometimes man pages are a bit confusing to look at, or not "entirely" helpful from a new user's perspective. It depends on the command you are looking up, really. You found a good place here, as people want to help.

For instance,
Code:
man grep

has examples of usage at the bottom, one of which is how to find lines in a file (named "myfile") that do NOT contain the words "foo" and "bar".
Check out the examples and scroll back up in the man page to see which grep options in those examples do what.

You could with some study of the man page for grep, figure out how to find lines that DO contain the words "foo" and "bar".

When using any search tools, try to be as general as possible to start, and refine as needed after seeing the results.

In your example text, evaluate what is a unique value for each of the lines you want returned.
 

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std::hash< _Tp >(3cxx)													    std::hash< _Tp >(3cxx)

NAME
std::hash< _Tp > - SYNOPSIS
Inherits std::__hash_base< _Result, _Arg >. Public Types typedef _Arg argument_type typedef _Result result_type Public Member Functions size_t operator() (_Tp __val) const template<> size_t operator() (bool __val) const template<> size_t operator() (char __val) const template<> size_t operator() (signed char __val) const template<> size_t operator() (unsigned char __val) const template<> size_t operator() (wchar_t __val) const template<> size_t operator() (char16_t __val) const template<> size_t operator() (char32_t __val) const template<> size_t operator() (short __val) const template<> size_t operator() (int __val) const template<> size_t operator() (long __val) const template<> size_t operator() (long long __val) const template<> size_t operator() (unsigned short __val) const template<> size_t operator() (unsigned int __val) const template<> size_t operator() (unsigned long __val) const template<> size_t operator() (unsigned long long __val) const template<> size_t operator() (float __val) const template<> size_t operator() (double __val) const template<> size_t operator() (long double __val) const Detailed Description template<typename _Tp>struct std::hash< _Tp > Primary class template hash. Definition at line 58 of file functional_hash.h. Author Generated automatically by Doxygen for libstdc++ from the source code. libstdc++ Tue Nov 27 2012 std::hash< _Tp >(3cxx)
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