omochimetaru

var d: [Float: String] = [:] d[.nan] = "a" d[.nan] = "b" d[.nan] = "c" print(d.count) print(d[.nan]) print(d == d)

Version:

swift-4.1.1-RELEASE

Output:

3 nil true

Error:

/usercode/main.swift:6:7: warning: expression implicitly coerced from 'String?' to Any print(d[.nan]) ^~~~~~~ /usercode/main.swift:6:8: note: provide a default value to avoid this warning print(d[.nan]) ~^~~~~~ ?? <#default value#> /usercode/main.swift:6:8: note: force-unwrap the value to avoid this warning print(d[.nan]) ~^~~~~~ ! /usercode/main.swift:6:8: note: explicitly cast to Any with 'as Any' to silence this warning print(d[.nan]) ~^~~~~~ as Any