WORKDIRDockerfile中的关键字指的是什么上下文？是在我docker build从我生产的容器内运行还是在我生产的容器内运行？
我发现自己经常放入RUN cd && ...我的 docker 文件，并希望有另一种方式，我觉得我错过了一些东西。
I was reading the grep man page and came across the -q option, which tells grep to "not write anything to standard output. Exit immediately with zero status if any match is found, even if an error was detected."
I don't understand why this could be desirable or useful behavior. In a program who's reason d'etre seems to be read from stdin, process, write to stdout, why would I want to silence it completely?
In what case would silencing a …
在我的for element of array循环中，我想访问当前元素之外的元素。具体而言，上一个或下一个元素。我也希望这能跨越第一个/最后一个元素障碍。如何做到这一点？
即。给出：
my_fruits = ['apple', 'banana', 'grapes', 'blueberries']
for (const fruit of my_fruits) {
// When fruit === 'banana', I want to access 'apple',
// when fruit === 'blueberries' I want to access 'grapes'.
// Also when it's the last element, I want to acknowledge that and access the first.
}
由于我async/await在当地人中的处理方式，.forEach因此我希望避免这种情况。
谢谢
在我正在处理的代码库中，有一行采用以下格式：
const {key1: value1, key2:value2} = name
从左到右的分配是什么？=从右到左不起作用？