Std.MultiKeyMap.fold
1 declaration
fn
fold: &Std.MultiKeyMap.MultiKeyMap[A, B, V] -> fn(R, A, B, V) -> R -> R -> RThis 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.