list::remove_if (STL/CLR)

Artigo
06/05/2017

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The latest version of this topic can be found at list::remove_if (STL/CLR).

Removes elements that pass a specified test.

Syntax

template<typename Pred1>  
    void remove_if(Pred1 pred);

Parameters

pred
Test for elements to remove.

Remarks

The member function removes from the controlled sequence (erases) every element X for which pred``(X) is true. You use it to remove all elements that satisfy a condition you specify as a function or delegate.

Example

// cliext_list_remove_if.cpp   
// compile with: /clr   
#include <cliext/list>   
  
int main()   
    {   
    cliext::list<wchar_t> c1;   
    c1.push_back(L'a');   
    c1.push_back(L'b');   
    c1.push_back(L'b');   
    c1.push_back(L'b');   
    c1.push_back(L'c');   
  
// display initial contents " a b b b c"   
    for each (wchar_t elem in c1)   
        System::Console::Write(" {0}", elem);   
    System::Console::WriteLine();   
  
// fail to remove and redisplay   
    c1.remove_if(cliext::binder2nd<cliext::equal_to<wchar_t> >(   
        cliext::equal_to<wchar_t>(), L'd'));   
    for each (wchar_t elem in c1)   
        System::Console::Write(" {0}", elem);   
    System::Console::WriteLine();   
  
// remove and redisplay   
    c1.remove_if(cliext::binder2nd<cliext::not_equal_to<wchar_t> >(   
        cliext::not_equal_to<wchar_t>(), L'b'));   
    for each (wchar_t elem in c1)   
        System::Console::Write(" {0}", elem);   
    System::Console::WriteLine();   
    return (0);   
    }

a b b b c  
a b b b c  
b b b

Requirements

Header: <cliext/list>

Namespace: cliext

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