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What Is Extractor In Scala? What Is The Difference Between Constructor And Extractor In Scala? What Is The Use Of Extractor In Scala? |
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Answer» Not only in Java and Scala, in almost all OOP languages Constructor is used to create (or assemble) an object or an instance of a Class using it’s parameters (or components). Extractor is quite OPPOSITE to Constructor. In Scala, Extractor is used to decompose or disassemble an object into it’s parameters (or components). In Scala, apply method is a Constructor. Internally, Extractor uses unapply method to decompose an OBJECTS into it’s parts (or parameters). In Scala, Extractor is mainly used in PATTERN MATCHING CONCEPT. We will discuss Pattern Matching concept soon. Not only in Java and Scala, in almost all OOP languages Constructor is used to create (or assemble) an object or an instance of a Class using it’s parameters (or components). Extractor is quite opposite to Constructor. In Scala, Extractor is used to decompose or disassemble an object into it’s parameters (or components). In Scala, apply method is a Constructor. Internally, Extractor uses unapply method to decompose an objects into it’s parts (or parameters). In Scala, Extractor is mainly used in Pattern Matching concept. We will discuss Pattern Matching concept soon. |
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