js获取字符串中数字

function getNumbersFromString(str) {
    // 使用正则表达式匹配所有数字
    const regex = /\d+/g;
    const matches = str.match(regex);
    return matches ? matches.map(Number) : [];
}

// 示例
const str = "abc123def456ghi789";
console.log(getNumbersFromString(str)); // 输出: [123, 456, 789]

function getNumbersFromString(str) {
    let numbers = [];
    let currentNumber = '';

    for (let i = 0; i < str.length; i++) {
        const char = str[i];
        if (!isNaN(char)) {
            currentNumber += char;
        } else {
            if (currentNumber !== '') {
                numbers.push(parseInt(currentNumber, 10));
                currentNumber = '';
            }
        }
    }

    // 检查最后一个字符序列是否为数字
    if (currentNumber !== '') {
        numbers.push(parseInt(currentNumber, 10));
    }

    return numbers;
}

// 示例
const str = "abc123def456ghi789";
console.log(getNumbersFromString(str)); // 输出: [123, 456, 789]

function getNumbersFromString(str) {
    return str.split('').filter(char => !isNaN(char)).map(Number);
}

// 示例
const str = "abc123def456ghi789";
console.log(getNumbersFromString(str)); // 输出: [1, 2, 3, 4, 5, 6, 7, 8, 9]