IndexOf

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indexOf returns index or key of the given value, or null if not found.

Arguments

Parameter Name Default Value Meaning
self string, list, or map object to search
value any value to search for
after any, optional if given, starts the search after this index

Examples

"Hello World".indexOf("o")		// returns 4
"Hello World".indexOf("o", 4)		// returns 7
"Hello World".indexOf("o", 7)		// returns null