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Add solution for problem 1146#128
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fishercoder1534 merged 2 commits intofishercoder1534:masterfromltp88:js-prolem-1146-solutionNov 6, 2020
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1 change: 1 addition & 0 deletionsREADME.md
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48 changes: 48 additions & 0 deletionsjavascript/_1146.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| /** | ||
| * Author: Phuong Lam | ||
| */ | ||
| /** | ||
| * @param {number} length | ||
| */ | ||
| var SnapshotArray = function (length) { | ||
| this.changes = {} | ||
| this.snapShots = [] | ||
| } | ||
| /** | ||
| * @param {number} index | ||
| * @param {number} val | ||
| * @return {void} | ||
| */ | ||
| SnapshotArray.prototype.set = function (index, val) { | ||
| this.changes[index] = val | ||
| } | ||
| /** | ||
| * @return {number} | ||
| */ | ||
| SnapshotArray.prototype.snap = function () { | ||
| this.snapShots.push(this.changes) | ||
| this.changes = {} | ||
| return this.snapShots.length - 1 | ||
| } | ||
| /** | ||
| * @param {number} index | ||
| * @param {number} snap_id | ||
| * @return {number} | ||
| */ | ||
| SnapshotArray.prototype.get = function (index, snap_id) { | ||
| while (snap_id >= 0 && this.snapShots[snap_id][index] === undefined) snap_id-- | ||
| if (snap_id >= 0) return this.snapShots[snap_id][index] | ||
| return 0 | ||
| } | ||
| /** | ||
| * Your SnapshotArray object will be instantiated and called as such: | ||
| * var obj = new SnapshotArray(length) | ||
| * obj.set(index,val) | ||
| * var param_2 = obj.snap() | ||
| * var param_3 = obj.get(index,snap_id) | ||
| */ |
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