打字稿/ Javascript:用随机数替换所有字符串出现次数

Question

我有以下函数用随机数替换字符串出现.我目前用相同的随机数替换字符串.我需要一个函数来替换每个实例一个唯一的数字.这就是我所拥有的.

尝试澄清:

我想找到的所有匹配'},{和替换它与},"random":{地方random是每次出现的唯一的整数.

result = this.replaceAll(result, '},{', `},"${this.getRandomInt(1, 2000)}":{`);

private getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

private replaceAll(str, find, replace) {
  return str.replace(new RegExp(this.escapeRegExp(find), 'g'), replace);
}

private escapeRegExp(str) {
  return str.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1");
}

目前结果是有效的

},"1340":{"expense_category_id":"63","amount":3},"1340":{"expense_category_id":"62","amount":3}}}}

1340不应该重复

编辑:替换all之前的结果值是:

},{"expense_category_id":"63","amount":3},{"expense_category_id":"62","amount":3}}}}

Answer 1

将函数传递给replace()第二个参数,如下所示:

function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

function replaceAll(str, find, replace) {
  return str.replace(new RegExp(this.escapeRegExp(find), 'g'), replace);
}

function escapeRegExp(str) {
  return str.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1");
}

var input = '},{"expense_category_id":"63","amount":3},{"expense_category_id":"62","amount":3}}}}',
    result = replaceAll(input, '},{', (x => '},"' + getRandomInt(1, 2000) + '":{'));

console.log(result);

我不确定为什么,但它似乎使用为第一次迭代生成的相同字符串用于后续迭代.使用函数,您可以强制它每次运行.