RosettaCodeData/Task/String-matching/J/string-matching-2.j

   'abcd' startswith 'ab'
1
   'abcd' startswith 'cd'
0
   'abcd' endswith 'ab'
0
   'abcd' endswith 'cd'
1
   'abcd' contains 'bb'
0
   'abcd' contains 'ab'
1
   'abcd' contains 'bc'
1
   'abab' contains 'ab'
1
   'abab' I.@E.~ 'ab'       NB. find starting indicies
0 2