Std.SortedMap.floor

fn

This is a callable function.

What it does

The largest entry whose key is not greater than the given one.

The question a lookup table asks. A postage rate for a parcel of 900 grams

is the rate for the heaviest bracket at or below 900, and the table has no

entry for 900 itself.

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.
• Option holds Some(value) or None when no value is available.