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先整理?
book

先整理?

by Kent Beck
May 2025
Intermediate to advanced
124 pages
1h 7m
Chinese
O'Reilly Media, Inc.
Content preview from 先整理?

第 10 章 显式参数 显式参数

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你在阅读一些想要修改的代码时,发现其中的一些数据并没有明确传递给例程。如何明确输入数据?

拆分例程。上半部分收集参数,并将其明确传递给下半部分。

在地图中,经常可以看到传递的参数块。这样就很难阅读和理解需要哪些数据。这还会导致修改参数以供日后(隐含)使用的可怕滥用。

例如,如果您看到以下内容

params = { a: 1, b: 2 }
foo(params)

function foo(params)
    ...params.a... ...params.b...

通过分割foo 使参数显式化:

function foo(params)
    foo_body(params.a, params.b)

function foo_body(a, b)
   ...a... ...b...

另一种使用显式参数的情况是在代码深处使用环境变量。将参数显式化,然后准备好将它们推向调用函数的链条。这将使代码更易于阅读、测试和分析。

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Publisher Resources

ISBN: 9798341656949