You can solve this problem by using String.intern or maintaining a user hash set or hash map.

您可以通过使用String . intern或维护一个用户散列集合或散列映射来解决这个问题。

youdao

Hash entries are, similarly to arrays, easy to set but difficult to remove.

散列项类似于数组，易于设置但难以除去。

youdao

For example, the attributes of an XML node would naturally be represented in Perl as a hash, since they are a set of unique name-value pairs.

例如，在Perl中，把xml节点的属性自然地表示成一个散列，因为它们是一组唯一的名称-值对。

youdao

The scores were level when Wellens made a hash of collecting a high ball to set up Dorn, and Westerman added the extras to put the result beyond doubt.

BBC: Castleford 30-24 St Helens