[leetcode, JS] 2011. Final Value of Variable After Performing Operations

문제

문제 링크 : Final Value of Variable After Performing Operations

풀이

/**
 * @param {string[]} operations
 * @return {number}
 */
var finalValueAfterOperations = function(operations) {
    return operations.reduce( (output, operation) => {
        return (operation === 'X++' || operation === '++X') ? output+1 : output-1
    }, 0)
};

1. reduce를 통해 카운트 계산

• Runtime 45 ms, Memory 41.96 MB