请注意，由于add函数的输入参数在运行时被绑定到int类自变量，因此产生了数值的增加。

Note that a numeric addition has occurred because the input parameter to the add function is bound to an int type argument at function execution time. Now, try this.

youdao

函数可以存储于关联数组中(关联数组是这样一类数组：它们按名称而不是数值索引)。

Functions can be stored in associative arrays (arrays that are indexed by names rather than Numbers).

youdao

在函数式版本中，我提取了纯函数(即没有副作用的函数)并将其放入它们各自的类中，通过提供参数值来调用它们。

In the functional version, I extracted the pure functions (ones that have no side-effects) into their own class, calling them by supplying parameter values.

youdao