(walk)
| 1 | function isValidWalk(walk) { |
| 2 | let n = 0; |
| 3 | let s = 0; |
| 4 | let e = 0; |
| 5 | let w = 0; |
| 6 | |
| 7 | if(walk.length < 2 || !walk.length) return false; |
| 8 | for(const direction of walk) { |
| 9 | if(direction === 'n') n++; |
| 10 | if(direction === 's') s++; |
| 11 | if(direction === 'e') e++; |
| 12 | if(direction === 'w') w++; |
| 13 | } |
| 14 | |
| 15 | if(n + s + e + w > 10) return false; |
| 16 | return ((n + s + e + w < 10) ? false : n - s === 0 && e - w === 0); |
| 17 | } |
| 18 | |
| 19 | const walk =['n','n','n','s','n','s','n','s','n','s'] |
| 20 | console.log(isValidWalk(walk)); |