Re: [Boost-users] converting value before inserting into a list

-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Alexander Shyrokov Sent: 19 September 2006 14:19 To: boost-users@lists.boost.org Subject: [Boost-users] converting value before inserting into a list

I want to convert values according to a map before inserting it into the list. What is a proper way to do that? I have this:

map m; vector<int> a,b;

for(vector<int>const_iterator i=a.begin();i!=a.end();++i) b.push_back(m[*i]);

I could use std::copy with std::back_inserter to add elements to b, but how do I convert it first? Should I write my own version of back_inserter for that?

copy(a.begin(),a.end(),my_back_inserter(b,m));

Thanks. -- Regards, Alexander. http://sjcomp.com _______________________________________________

I probably being very anti-modern C++ here, but I think that the for loop takes a lot of beating for readability......its probably the most efficient too (with a bit of cacheing of invarients)...... I do find that some of these so called 'helpers' do make the code more obscure, but that's perhaps because I have spent 15 years doing C then C++, rather than solely starting with C++. James

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