在JS中将字符串转换为数组

Question

在我的项目中，我有一个如下的用例：

我有一个如下的响应数组，

(4) [{…}, {…}, {…}, {…}]
0:{header: 0, name: "Name", field: "Id"}
1:{header: 3, name: "LastName", field: "Agreement__c"}
2:{header: 3, name: "LastName", field: "Amount__c"}
3:{header: 3, name: "LastName", field: "BIC__c"}
length:4

从上面我通过使用将上面的数组转换为String，

JSON.stringify(responseArray)并将其存储在字符串字段中。

之后，我想对该字段的值进行动态处理。 因此，当我从字段中获取价值时，如下图所示，

[{"header":0,"name":"Name","field":"Id"}, 
{"header":3,"name":"LastName","field":"Agreement__c"}, 
{"header":3,"name":"LastName","field":"Amount__c"}, 
{"header":3,"name":"LastName","field":"BIC__c"}]

任何人都可以帮助我将上述字符串响应转换为Javascript中的数组，如下所示，

index 0 -> {"header":0,"name":"Name","field":"Id"}
index 1 -> {"header":3,"name":"LastName","field":"Agreement"}

我已经尝试过使用split函数，但是无法满足确切的需求。

Answer 1

将方括号放在字符串的开头和结尾，然后调用JSON.parse ：

 $ node

 > const text = `{"header":0,"name":"Name","field":"Id"}, 
    {"header":3,"name":"LastName","field":"Agreement"}, 
    {"header":3,"name":"LastName","field":"Amount"}, 
    {"header":3,"name":"LastName","field":"BIC"}`

 > JSON.parse(`[${text}]`)
 [ { header: 0, name: 'Name', field: 'Id' },
   { header: 3, name: 'LastName', field: 'Agreement' },
   { header: 3, name: 'LastName', field: 'Amount' },
   { header: 3, name: 'LastName', field: 'BIC' } ]

Answer 2

您可以使用以下代码示例，首先在字符串的开头附加"["在字符串的末尾附加"[" "]" ，这样您的字符串将被很好地格式化为JSON数组，然后使用JSON.parse内置函数轻松解析它

 a = '['+'{"header":0,"name":"Name","field":"Id"}, {"header":3,"name":"LastName","field":"Agreement"}, {"header":3,"name":"LastName","field":"Amount"}, {"header":3,"name":"LastName","field":"BIC"}'+"]"

 var myarray = JSON.parse(a);

Answer 3

是的， JSON.parse是真正简单的答案。

Answer 4

您只需要一些基本的字符串操作，顺便说一句，我将您的字符串更改为有效的语法

 var str="{\\"header\\":0,\\"name\\":\\"Name\\",\\"field\\":\\"Id\\"},{\\"header\\":3,\\"name\\":\\"LastName\\",\\"field\\":\\"Agreement\\"},{\\"header\\":3,\\"name\\":\\"LastName\\",\\"field\\":\\"Amount\\"},{\\"header\\":3,\\"name\\":\\"LastName\\",\\"field\\":\\"BIC\\"}"; str=str.replace(/},{/g,"}|{"); var arr = str.split("|"); var json = []; for(i=0; i<arr.length; i++){ json.push(JSON.parse(arr[i])); } //console.log(json); console.log(json[0]); console.log(json[1]); 

Answer 5

尝试这个

  var textstr = '[{"header":0,"name":"Name","field":"Id"},{"header":3,"name":"LastName","field":"Agreement"}, {"header":3,"name":"LastName","field":"Amount"}, {"header":3,"name":"LastName","field":"BIC"}]'; var textstr2 = JSON.parse(textstr); console.log(textstr2)