You want to be able to filter arrays based on a Boolean condition.

你想基于某个布尔条件来过滤数组。

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You've got a loop, you've got a condition and a Boolean to check if he's touching the edge, and some statements to tell him to shout or to actually turn around.

我们有一个循环，通过一个条件和一个布尔值来判断，是否触到了边缘，还有一些语句，让它回头并咆哮。

youdao

The constraint attribute contains a Boolean expression, which defines the condition to which the data is constrained.

constraint属性包含一个布尔表达式，它定义数据必须符合的条件。

youdao

You've got a loop, you've got a condition and a boolean to check if he's touching the edge, and some statements to tell him to shout or to actually turn around.

我们有一个循环，通过一个条件和一个布尔值来判断,是否触到了边缘，还有一些语句,让它回头并咆哮。

哈佛公开课 - 计算机科学课程节选