查找数组中的重复字符串并对其进行修改

function findAndModifyDuplicates(arr) {
    const seen = new Set();
    const duplicates = new Map();

    arr.forEach(item => {
        if (seen.has(item)) {
            if (!duplicates.has(item)) {
                duplicates.set(item, []);
            }
            duplicates.get(item).push(item);
        } else {
            seen.add(item);
        }
    });

    duplicates.forEach((value, key) => {
        const modifiedKey = `${key}_${value.length}`;
        value.forEach((item, index) => {
            arr[arr.indexOf(item)] = modifiedKey;
        });
    });

    return arr;
}

const inputArray = ['apple', 'banana', 'apple', 'orange', 'banana', 'grape'];
const resultArray = findAndModifyDuplicates(inputArray);
console.log(resultArray); // 输出: ['apple_2', 'banana_2', 'apple_2', 'orange', 'banana_2', 'grape']