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37 lines (36 loc) · 934 Bytes
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Copy path01.js
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37 lines (36 loc) · 934 Bytes
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/**
* 682. 棒球比赛 难度：简单
* @param {string[]} ops
* @return {number}
*/
var calPoints = function (arr) {
// 使用数组实现堆栈结构
let result = [];
// 上一轮的数据
let pre1;
// 上上轮的数据
let pre2;
arr.forEach(item => {
switch (item) {
case 'C':
if(result.length){
result.pop();
}
break;
case 'D':
pre1 = result.pop();
result.push(pre1,pre1*2)
break;
case '+':
pre1 = result.pop();
pre2 = result.pop();
result.push(pre2,pre1,pre1+pre2)
break;
default:
result.push(item*1)
break;
}
})
return result.reduce((total,sum)=>total+sum)
};
console.log(calPoints(["5","2","C","D","+"]))