682-baseball-game

DevGod
Vtuber
/** * @param {string[]} operations * @return {number} */var calPoints = function(operations) { let stack = []; for(let op of operations){ if( /[0-9]/.test(op)){ stack.push(Number(op)); } if(op === "C"){ stack.pop(); } if(op == "D"){ stack.push(stack[stack.length-1]*2); } if(op === "+"){ let val = stack[stack.length-1]+stack[stack.length-2]; stack.push(val); } } return _.sumBy(stack);};