index
Returns the first position at which a `needle` can be found in a `haystack`.
Return
position in the array or string or -1 if not found.
Parameters
needle
the item expression
haystack
the array or string expression
See also
open fun indexOf(@NonNull keyword: Expression, @NonNull input: Expression, @NonNull fromIndex: Expression): Expression(source)
Returns the first position at which a `needle` can be found in a `haystack`.
Return
position in the array or string or -1 if not found.
Parameters
needle
the item expression
haystack
the array or string expression
from
the index to start searching from