STL for_each

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一.for_each()只能配合global function和function object。

二.procedure based、object oriented、generics三种paradigm与for_each()搭配

1>global function

prodecebased不传入参数：for_each(ivec.begin(), ivec.end(), printElem);

prodecebased传入参数:for_each(ivec.begin(), ivec.end(), bind2nd(ptr_fun(printElem), "Element:"));

2>object oriented

重载operate()

不传入参数：for_each(ivec.begin(), ivec.end(), printElem());

不传入参数：for_each(ivec.begin(), ivec.end(), printElem("Element:"));

member_function与for_each()

不传入参数：

for_each(_doorVec.begin(), _doorVec.end(), mem_fun_ref(&Door::open));//通过mem_fun_ref()这个function adapter將member function转成function object。

for_each(_doorVec.begin(), _doorVec.end(), mem_fun(&AbstractDoor::open));

传入参数：

for_each(_doorVec.begin(), _doorVec.end(), bind2nd(mem_fun(&AbstractDoor::openDoorBy), "John"));

......

参考资料：

http://www.cnblogs.com/Purple_Xiapei/archive/2012/05/27/2520477.html

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