tree d701bce85d0695dd11e4473a759c443794eee2c7
parent bd0f77f1893945f4bc56439e9038d28cb6962a89
author Nate Bosch <nbosch1@gmail.com> 1598543049 -0700
committer GitHub <noreply@github.com> 1598543049 -0700
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Correct a misused putIfAbsent call (#109)

There is no need to assign within the callback for a `putIfAbsent`
default. Refactor to the most idiomatic version today which is to use
`??=` (since we don't ever assign a null value so we don't care about
the distinction between a missing key and a key assigned to null) and
return the value directly rather than putting it in the Map and then
pulling it back out.