The Daily WTF

Let’s say your company wanted to offer special deals. When a customer calls about one of these deals, you want to play an automated customer support message using SignalWire, a tool for scripting phone voice trees.

This is a natural case for using a Map data structure. Which is what Ajay‘s predecessor did. They just… uh… weren’t sure how to use a Map.

public String convert(Deal deal) { List<Deal> single = Collections.singletonList(deal); Map<Deal, String> swml = client.getSWMLs(single, version); for(Map.Entry<Deal, String> entry : swml.entrySet()) { if (deal.equals(entry.getKey())) { return entry.getValue(); } } return “”; }

This Java code looks like a case of trying to fit some APIs together awkwardly.

Our function takes a Deal object. The client.getSWMLs function apparently requires a list as its input, because we start by converting the input into a singletonList- a list with one item in it.

client.getSWMLs then returns a map, presumably mapping

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