在JS中將字符串轉換為數組

Question

在我的項目中，我有一個如下的用例：

我有一個如下的響應數組，

(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

從上面我通過使用將上面的數組轉換為String，

JSON.stringify(responseArray)並將其存儲在字符串字段中。

之后，我想對該字段的值進行動態處理。 因此，當我從字段中獲取價值時，如下圖所示，

[{"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"}]

任何人都可以幫助我將上述字符串響應轉換為Javascript中的數組，如下所示，

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

我已經嘗試過使用split函數，但是無法滿足確切的需求。

Answer 1

將方括號放在字符串的開頭和結尾，然后調用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

您可以使用以下代碼示例，首先在字符串的開頭附加"["在字符串的末尾附加"[" "]" ，這樣您的字符串將被很好地格式化為JSON數組，然后使用JSON.parse內置函數輕松解析它

 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是真正簡單的答案。

Answer 4

您只需要一些基本的字符串操作，順便說一句，我將您的字符串更改為有效的語法

 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

嘗試這個

  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)