Std.PrefixTrie.fold

fn

This is a callable function.

What it does

Every entry combined into one value, in key order.

Read the signature

• The text after the name is the type checked by Pudu.
• Read arrows from left to right: inputs come first, and the final type is returned.
• & borrows a value for this call instead of moving or copying it.
• Names inside [ ] are type arguments, such as the item type held by a collection.