Problems › JavaScript › games
Look up a player level
A game tracks experience points against a table of ascending thresholds. Find the highest level reached.
- The thresholds list is sorted ascending and contains the XP needed for each level.
- Return the index of the highest threshold the player has met or exceeded.
- If the player has not reached even the first threshold, return -1.
- An empty thresholds list means level 0 is returned.
levelProgress(xp: int, thresholds: list<int>) → int
Where you start
function levelProgress(xp, thresholds) {
}Worked examples
| Call | Result |
|---|---|
levelProgress(50, [10,30,60,100]) | 1 |
levelProgress(100, [10,30,60,100]) | 3 |
levelProgress(5, [10,30,60]) | -1 |
levelProgress(0, []) | 0 |
Hint
Walk the thresholds and remember the last one that was met.
Reference solution in JavaScript
function levelProgress(xp, thresholds) {
if (thresholds.length === 0) return 0;
if (xp < thresholds[0]) return -1;
let result = 0;
for (let i = 0; i < thresholds.length; i++) {
if (thresholds[i] <= xp) result = i;
}
return result;
}