303. 区域和检索

;(function(){
    /**
     * 303. 区域和检索 - 数组不可变
     *
     */

    class NumArray {
        [prop: string]: any

        constructor(nums: number[]) {
            this.nums = nums
        }

        sumRange(left: number, right: number): number {
            let total: number = 0
            for(let i = left; i <= right; i++) {
                total += this.nums[i]
            }
            return total
        }
    }

})()