Created
June 5, 2019 17:34
-
-
Save jerolba/667a9afc6329053c537328d568faeb21 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
//Given the stock of some products and stores | |
//BikeyMap<Product, Store, Stock> stock = new TableBikeyMap<>(); | |
BikeyMap<String, String, Integer> stock = new TableBikeyMap<>(); | |
stock.put("shirt-ref-123", "store-76", 10); | |
stock.put("pants-ref-456", "store-12", 24); | |
... | |
stock.put("tie-ref-789", "store-23", 2); | |
//Get the stock of a product/store | |
Integer inStock = stock.get("shirt-ref-1234", "store-45"); | |
//Total Stock in store-123 | |
stock.entrySet().stream() | |
.filter(entry -> entry.getColumn().equals("store-123")) | |
.mapToInt(entry -> entry.getValue()) | |
.sum(); | |
//Total Stock of pants-ref-457 | |
stock.entrySet().stream() | |
.filter(entry -> entry.getRow().equals("pants-ref-457")) | |
.mapToInt(entry -> entry.getValue()) | |
.sum(); | |
//All existing products | |
Set<String> products = stock.rowKeySet(); | |
//All existing stores | |
Set<String> stores = stock.columnKeySet(); | |
//If it contains a product/store | |
if (stock.containsKey("tie-ref-789", "store-23")) { | |
.... | |
} | |
//Get all products/stores present in the map | |
BikeySet<String, String> productStores = map.bikeySet(); | |
//BikeySet<R, C> implements also Set<Bikey<R, C>> | |
Set<Bikey<String, String>> productStoresSet = map.bikeySet(); | |
//Get all products/stores with stock | |
BikeySet<String, String> withStock = stock.entrySet().stream() | |
.filter(entry -> entry.getValue() > 0) | |
.map(BikeyEntry::getKey) | |
.collect(BikeyCollectors.toSet()); | |
//Do something with each map element | |
stock.forEach((product, store, units) -> { | |
System.out.println("Product " + product + " has " + units + " in store " + store); | |
}); | |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment