Problems › JavaScript › games
Find the longest winning streak
A sequence of game results is recorded as wins and losses. Find the length of the longest unbroken streak of wins.
- A streak is a consecutive run of true values.
- A false value breaks any current streak.
- An empty list or all losses returns zero.
winStreak(results: list<bool>) → int
Where you start
function winStreak(results) {
}Worked examples
| Call | Result |
|---|---|
winStreak([true,true,false,true]) | 2 |
winStreak([false,false,false]) | 0 |
winStreak([true,true,true]) | 3 |
winStreak([]) | 0 |
Hint
Keep a running counter that resets on every false, and track the best so far.
Reference solution in JavaScript
function winStreak(results) {
let best = 0, cur = 0;
for (const r of results) {
if (r) { cur++; if (cur > best) best = cur; }
else cur = 0;
}
return best;
}