| 25 | }; |
| 26 | |
| 27 | var checkOneDiff = function(first, second) { |
| 28 | if (first.length !== second.length) { |
| 29 | return false; |
| 30 | } else { |
| 31 | var mulligan = false; |
| 32 | var fP = 0; // first Pointer |
| 33 | var sP = 0; // second Pointer |
| 34 | while (fP < first.length) { |
| 35 | if (first[fP] !== second[sP]) { |
| 36 | if (mulligan) { |
| 37 | return false; // more than one mismatch |
| 38 | } else { |
| 39 | mulligan = true; // use up mulligan |
| 40 | } |
| 41 | } |
| 42 | fP++; |
| 43 | sP++; |
| 44 | } |
| 45 | return true; |
| 46 | } |
| 47 | }; |
| 48 | // insert a char for str1 -> remove a char for str2 |
| 49 | // check one diff |
| 50 | |