September 2019
Intermediate to advanced
462 pages
11h 3m
English
Content preview from Programming Kotlin
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Overloading Operators
Traditionally we use operators on numeric types to create expressions, for example, 2 + 3 or 4.2 * 7.1. Operator overloading is a feature where the language extends the capability to use operators on user-defined data types.
Compare the two lines in the following code snippet:
| | bigInteger1.multiply(bigInteger2) |
| | |
| | bigInteger1 * bigInteger2 |
The first line uses the multiply method from the JDK. The second line uses the * operator on the instances of BigInteger; that operator comes from the Kotlin standard library. The second line takes less effort—both to write and to read—than the first line, even though they both accomplish the same thing. The operator * makes the code look more natural, fluent, less code-like than the ...
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