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                >[success] # 范式 * `HOF0`是高階函數的**等價范式**,`HOF0`修飾的函數功能和原函數`fn`的功能完全相同。因為被修飾后的函數就只是采用調用的`this`上下文和參數來調用`fn`,并將結果返回。也就是說,執行它和直接執行`fn`完全沒區別 ~~~ function HOF0(fn) { return function(...args) { return fn.apply(this, args); } } ~~~ ![](https://img.kancloud.cn/e5/6f/e56fee4b68cb8dd03b99f998c5120cd2_654x301.png) >[danger] ##### 利用這些范式去組合 ~~~ function continous(reducer) { return function (...args) { return args.reduce((a, b) => reducer(a, b)); }; } const add = continous((a, b) => a + b); const multiply = continous((a, b) => a * b); console.log(add(1, 2, 3, 4)); // 1 + 2 + 3 + 4 = 10 console.log(multiply(1, 2, 3, 4, 5)); // 1 * 2 * 3 * 4 * 5 = 120 ~~~
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