Guide

本章对C++ STL的使用理念进行总结，主要包括如下guideline:

Range-based algorithm

参见 Range-based-algorithms 章节

Prefer algorithm over hand-write loop

1、drdobbs STL Algorithms vs. Hand-Written Loops

主要提出了如下原因:

There are three reasons:

• Efficiency: Algorithms are often more efficient than the loops programmers produce.
• Correctness: Writing loops is more subject to errors than calling algorithms.
• Maintainability: Algorithm calls often yield code that is clearer and more straightforward than the corresponding explicit loops.

2、arne-mertz algorithms and the KISS principle

3、Intentional programming

相比于for loop，algorithm(比如std::for_each、std::transform等)的含义是更加精准、明确，符合intentional programming，能够让code更加得readable。

关于这个观点，参见 stackoverflow Should I use std::for_each? 。

Functional programming: Higher-order function

STL algorithm是典型的使用 FP的Higher-order function。