如何在JavaScript中从字符串解析数组？

我的

curl

调用看起来像

curl -v -H 'Content-Type:application/json' -d '{"instanceIds": "[i-081ec3ffa72eb338, i-0c7474fb67bb9043]", "region": "us-west-2a"}' http://localhost:3001/instances/delete 

app.post('/instances/delete', function (req, res) {
  let {region, instanceIds} = req.body;
  console.log(region + "," + instanceIds);
  stopInstances(region, instanceIds)
    .then(function (data) {
      res.send(data);
    })
    .catch(function (reason) {
      res.status(500).send("Error in deleting instances: " + reason);
    });
});

export let stopInstances = function (region, instanceIds) {    
  let params = {InstanceIds: instanceIds, DryRun: true};
  console.log(params);
  return ec2.stopInstances(params).promise();
};

在我的基于

expressJS

的服务器上，端点看起来像

curl -v -H 'Content-Type:application/json' -d '{"instanceIds": "[i-081ec3ffa72eb338, i-0c7474fb67bb9043]", "region": "us-west-2a"}' http://localhost:3001/instances/delete 

app.post('/instances/delete', function (req, res) {
  let {region, instanceIds} = req.body;
  console.log(region + "," + instanceIds);
  stopInstances(region, instanceIds)
    .then(function (data) {
      res.send(data);
    })
    .catch(function (reason) {
      res.status(500).send("Error in deleting instances: " + reason);
    });
});

export let stopInstances = function (region, instanceIds) {    
  let params = {InstanceIds: instanceIds, DryRun: true};
  console.log(params);
  return ec2.stopInstances(params).promise();
};

函数

stopInstances

如下所示

curl -v -H 'Content-Type:application/json' -d '{"instanceIds": "[i-081ec3ffa72eb338, i-0c7474fb67bb9043]", "region": "us-west-2a"}' http://localhost:3001/instances/delete 

app.post('/instances/delete', function (req, res) {
  let {region, instanceIds} = req.body;
  console.log(region + "," + instanceIds);
  stopInstances(region, instanceIds)
    .then(function (data) {
      res.send(data);
    })
    .catch(function (reason) {
      res.status(500).send("Error in deleting instances: " + reason);
    });
});

export let stopInstances = function (region, instanceIds) {    
  let params = {InstanceIds: instanceIds, DryRun: true};
  console.log(params);
  return ec2.stopInstances(params).promise();
};

但是，这些值打印为

string

InstanceIds: '[i-081ec3ffa72eb338, i-0c7474fb67bb9043]'  

如何将其转换为

数组

？我尝试了

Array.from

，但它会解析每个字符

Array.from('[i-081ec3ffa72eb338, i-0c7474fb67bb9043]')
(40) ["[", "i", "-", "0", "8", "1", "e", "c", "3", "f", "f", "a", "7", "2", "e", "b", "3", "3", "8", ",", " ", "i", "-", "0", "c", "7", "4", "7", "4", "f", "b", "6", "7", "b", "b", "9", "0", "4", "3", "]"]  

但是我想要

[I-081ec3ffa72eb338，I-0c7474fb67bb9043]

---

谢谢

我的

curl

呼叫错误，根据

georg

的评论，我将其修复为

curl -v -H 'Content-Type:application/json' -d '{"instanceIds": ["i-081ec3ffa72eb338", "i-0c7474fb67bb9043"], "region": "us-west-2a"}' http://localhost:3001/instances/delete 

---

这就解决了问题。

您可以用逗号分隔字符串

var parts = your_string.split(",")

然后清洁零件，即拆下支架

var cleaned = parts.map( function (part) { 

             return part.replace(/[]/g, "");

});

清理后的变量现在应该具有所需的部分

---

未经测试，并且是从移动设备编写的，因此您可能需要重构该方法。

这是一个字符串，因为您传递了一个字符串，您可能需要

{“InstanceId”：[“i-081ec3ffa72eb338”，“i-0C74FB67BB9043”]…

在您的请求中。谢谢您的锐利目光！我完全傻了。我觉得可以随意删除问题而不是回答，只需删除即可。这对除您之外的其他人没有用处