pure function

基本解释

But a pure pipe must always be implemented with a pure function.
但是一个纯管道必须总是用纯函数实现。
angular.cn
This is an example of a pure function, a concept I'll investigate further in a future installment.
这就是纯函数的一个例子，在后续部分会对此做详细介绍。
If the task you are working on can be expressed as a pure function that simply processes input parameters into a return structure, it is easy to switch it out for different implementations.
如果你现在正工作在一个有参数传入和一个返回值结构的简单流程的函数，那可以很容易的切换成不同的实现。

More than that, though, it is a function of that far more Beltway-unique tendency, to report and comment on politics and governance as pure gamesmanship in such a way that conveys savvy but not judgment.
FORBES: Our Politics Has Become A Series Of Insane Stunts