[SOLVED] Similar function in C++ to Python's strip()?


There is a very useful function in Python called strip(). Any similar ones in C++?


There’s nothing built-in; I used to use something like the following:

template <std::ctype_base::mask mask>
class IsNot
    std::locale myLocale;       // To ensure lifetime of facet...
    std::ctype<char> const* myCType;
    IsNot( std::locale const& l = std::locale() )
        : myLocale( l )
        , myCType( &std::use_facet<std::ctype<char> >( l ) )
    bool operator()( char ch ) const
        return ! myCType->is( mask, ch );

typedef IsNot<std::ctype_base::space> IsNotSpace;

trim( std::string const& original )
    std::string::const_iterator right = std::find_if( original.rbegin(), original.rend(), IsNotSpace() ).base();
    std::string::const_iterator left = std::find_if(original.begin(), right, IsNotSpace() );
    return std::string( left, right );

which works pretty well. (I now have a significantly more complex
version which handles UTF-8 correctly.)

Answered By – James Kanze

Answer Checked By – Terry (BugsFixing Volunteer)

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