#23 Transforming a Collection into a Map with the Stream API

Companies:

Sberbank

Themes:

JavaStreams & LambdasPractice

The following collection is given

var strList = List.of(
    "CString1", "bString2", "CString3", "CString4", "bString5"
);

Using the Stream API:

Convert the strings to uppercase.
Create a map where the key is the first character of the string and the value is the strings.

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