By replacing formalfunction definitions with anonymous functions, you simplify code.
通过用匿名函数来替换正式函数定义，您可简化代码。
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The effect is altogether lighter and freer than what achieved in stone, but because both perform the same function, formal wooden and metal statues still display frontality.
One very important question to ask about any template function, not just about STL algorithms, is what the set of types is that may correctly be substituted for the formal template parameters.