Bid
The class Bid represents bids made for items up for auction in an electronic auction
house. Each Bid object stores the name of the bidder — that is, the customer who made
the bid — as well as the maximum amount the bidder is willing to pay for the item.
A bid object may also be created that has no bidder at all. This is useful, because a
Bid object with no bidder can now be used for representing the initial prices of auctions
before any genuine bids have been made.
A bid object is immutable after creation.
- Value parameters:
- bidder
the name of the customer who made the bid, wrapped in an
Option, orNoneif the object represents an initial price with no bidder- limit
the maximum sum of money the bidder is willing to pay for the item
Value members
Concrete methods
Determines whether this bid beats the given competing bid. A bid beats another if it has a higher limit, or if the limits are equal and the other bid is a bidderless initial bid.
Determines whether this bid beats the given competing bid. A bid beats another if it has a higher limit, or if the limits are equal and the other bid is a bidderless initial bid.
Determines whether this bid is a “bidderless bid” that represents an auction’s initial price.
Determines whether this bid is a “bidderless bid” that represents an auction’s initial price.
Checks whether this bid beats the given older bid, and returns one of the two bids accordingly: this bid if it beats the given one, the given bid otherwise.
Checks whether this bid beats the given older bid, and returns one of the two bids accordingly: this bid if it beats the given one, the given bid otherwise.