# I

- [indexOf](/scala/function-operation/i/indexof.md)
- [indexOfSlice](/scala/function-operation/i/indexofslice.md)
- [indexWhere](/scala/function-operation/i/indexwhere.md)
- [indices](/scala/function-operation/i/indices.md)
- [init](/scala/function-operation/i/init.md)
- [inits](/scala/function-operation/i/inits.md)
- [intersect](/scala/function-operation/i/intersect.md)
- [isDefinedAt (Map)](/scala/function-operation/i/isdefinedat-map.md)
- [isDefinedAt (Seq)](/scala/function-operation/i/isdefinedat-seq.md)
- [isEmpty](/scala/function-operation/i/isempty.md)
- [isTraversableAgain](/scala/function-operation/i/istraversableagain.md)