Can You Explain Completion Handler?

1.	Can You Explain Completion Handler?
Answer» Typecasting PATTERNS – This pattern allows you to match or cast the types. Wildcard Patterns – This pattern MATCHES as well as IGNORES any KIND and TYPE of value. Optional Patterns – This pattern is used to match the optional values.

Answer»

Typecasting PATTERNS – This pattern allows you to match or cast the types.
Wildcard Patterns – This pattern MATCHES as well as IGNORES any KIND and TYPE of value.
Optional Patterns – This pattern is used to match the optional values.

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