July 2018
Intermediate to advanced
400 pages
12h 14m
English
Content preview from Kotlin Programming: The Big Nerd Ranch Guide, First Edition
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Challenge: Reversing the Values in a Map
Using the functional techniques you learned in this chapter, write a function called flipValues that allows you to flip-flop the keys and values in a map. For example:
val gradesByStudent = mapOf("Josh" to 4.0, "Alex" to 2.0, "Jane" to 3.0)
{Josh=4.0, Alex=2.0, Jane=3.0}
flipValues(gradesByStudent)
{4.0=Josh, 2.0=Alex, 3.0=Jane}
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.