Merge pull request #789 from rcalago/master

Update on README.md

Author: lor6

core-kotlin-modules/core-kotlin-9/README.md

@@ -7,3 +7,6 @@
 - [Is Kotlin Pass-By-Value or Pass-By-Reference?](https://www.baeldung.com/kotlin/parameters-pass-value-reference)
 - [Util Classes in Kotlin](https://www.baeldung.com/kotlin/utility-class)
 - [Result Class in Kotlin](https://www.baeldung.com/kotlin/result-class)
+- [Underscore Operator for Type Arguments in Kotlin](https://www.baeldung.com/kotlin/underscore-type-arguments)
+- [Using Enums With when() in Kotlin](https://www.baeldung.com/kotlin/enums-with-when)
+- [Calling Private Methods of a Class From Outside the Class](https://www.baeldung.com/kotlin/private-methods-outside-class)

core-kotlin-modules/core-kotlin-arrays-2/README.md

@@ -3,3 +3,4 @@
 - [Removing the First Element From an Array in Kotlin](https://www.baeldung.com/kotlin/array-remove-first-element)
 - [Iterate Through an Array in Reverse Order in Kotlin](https://www.baeldung.com/kotlin/array-iterate-reverse)
 - [Cyclically Rotate Array by One in Kotlin](https://www.baeldung.com/kotlin/array-cyclic-rotation)
+- [Printing All Elements of a String Array in a Single Line in Kotlin](https://www.baeldung.com/kotlin/print-string-array-same-line)

core-kotlin-modules/core-kotlin-collections-list-2/README.md

@@ -2,3 +2,5 @@
 - [How to Convert Integer List to IntArray in Kotlin](https://www.baeldung.com/kotlin/convert-integer-list-intarray)
 - [Iterate Through a List and Add Items in Kotlin](https://www.baeldung.com/kotlin/list-iterate-add-items-dynamically)
 - [How to Convert a Type-Erased List to an Array in Kotlin](https://www.baeldung.com/kotlin/type-erased-list-array-conversion)
+- [How to Remove Null and Empty Values from a List in Kotlin](https://www.baeldung.com/kotlin/lists-remove-null-empty-values)
+- [How to Initialize a List of Lists in Kotlin](https://www.baeldung.com/kotlin/list-of-lists)

core-kotlin-modules/core-kotlin-lang-oop-3/README.md

@@ -9,4 +9,5 @@ This module contains articles about Object-Oriented Programming in Kotlin
 - [Comparing Objects in Kotlin](https://www.baeldung.com/kotlin/compare-objects)
 - [Extend Data Class in Kotlin](https://www.baeldung.com/kotlin/extend-data-class)
 - [Get Names of All Enum Entries by Generic Functions in Kotlin](https://www.baeldung.com/kotlin/enum-get-entry-names)
+- [Create a Function That Works for All Enum Classes in Kotlin](https://www.baeldung.com/kotlin/function-enum-classes)
 - More articles: [[<-- prev]](/core-kotlin-modules/core-kotlin-lang-oop-2)

core-kotlin-modules/core-kotlin-strings-4/README.md

@@ -10,3 +10,4 @@ This module contains articles about core Kotlin strings.
 - [How to Repeat a String N Times in Kotlin](https://www.baeldung.com/kotlin/repeating-strings)
 - [How to Convert a String to a Float in Kotlin](https://www.baeldung.com/kotlin/string-float-conversion)
 - [How to Reverse the Order of Words in a Sentence in Kotlin](https://www.baeldung.com/kotlin/reverse-sentence)
+- [Sorting a String Alphabetically in Kotlin](https://www.baeldung.com/kotlin/string-sort)