闭包 (bìbāo): closure (mathematics) — the sma…

Meanings

1 closure (mathematics) — the smallest closed set containing a given set
2 closure (computer science) — a function bundled together with references to its surrounding state

Characters

闭

to wrap; bundle; package

Examples

在拓扑学中，集合的闭包包含其所有极限点。

Zài tuòpūxué zhōng, jíhé de bìbāo bāohán qí suǒyǒu jíxiàndiǎn.

In topology, the closure of a set contains all its limit points.

JavaScript 的闭包让函数能记住外部变量。

JavaScript de bìbāo ràng hánshù néng jìzhù wàibù biànliàng.

JavaScript closures allow a function to remember outer variables.

Tips

usage

Two technical fields, same Chinese term. In math (topology, algebra) 闭包 is the closure operation — the smallest closed set containing your set. In programming, it's a function plus the lexical environment it captured. Context disambiguates instantly; outside math/CS the word is rare.