Check if s is a substring of t

Stream: Is there code for X?

[Scott Morrison]

I can't find the function that checks is s is a substring of t... Surely this is somewhere. We have String.startsWith and String.endsWith.

[Kyle Miller]

docs4#String.replace and docs4#String.splitOn are close but not quite right

[Matthew Ballard]

I think the fastest way currently is passing to .data and using the corresponding predicate on lists