找到字符串中可被3整除的所有数字的总和,并找到最后一个这样的数字(使用JavaScript)。实施例“的8最好6将得到9分”,总和= 15,最后= 9。
当然 - 使用split
,reduce
和filter
与%
(modulo)进行可分割:
const str = "The best 6 of 8 will get 9 points";
const strArr = str.split("");
const threesArr = strArr.filter(e => parseInt(e) % 3 == 0);
const sumOfThrees = threesArr.reduce((acc, curr) => acc + parseInt(curr), 0);
const allNumbers = strArr.filter(e => parseInt(e));
const lastNumber = allNumbers[allNumbers.length - 1];
console.log("Sum: " + sumOfThrees);
console.log("Last: " + lastNumber);