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Hey everybody,
Could somebody please provide an example for using the STL find_if for the following task. I am trying to search a vector of structs, using the following criteria: compare whether the key of the struct in the vector matches the key of another struct (instace of the same type of struct) that I want to find. So basically search the vector for a particular struct. I want to use find_if, in order to replace the handwritten routine I have now. I have seen many complex, examples online. If anybody knows of simple and clean way, please share. Thanks in advance.
Could somebody please provide an example for using the STL find_if for the following task. I am trying to search a vector of structs, using the following criteria: compare whether the key of the struct in the vector matches the key of another struct (instace of the same type of struct) that I want to find. So basically search the vector for a particular struct. I want to use find_if, in order to replace the handwritten routine I have now. I have seen many complex, examples online. If anybody knows of simple and clean way, please share. Thanks in advance.
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Loop through the vector of objects, if that object matches the one in hand return a success message?
... the hat of 'is this a cat in a hat?'
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#include <vector>
#include <algorithm>
struct some_struct { int key ; /* ... */ };
struct has_same_key
{
explicit ( const some_struct& s ) : what(s) {}
bool operator() ( const some_struct& elem ) const
{ return elem.key == what.key ; }
const some_struct& what ;
};
inline std::vector<some_struct>::const_iterator
do_find( const std::vector<some_struct>& vec, const some_struct& what )
{
return std::find_if( vec.begin(), vec.end(), has_same_key(what) ) ;
} |
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