删除 JSON 数组中对象之间的逗号
Posted
技术标签:
【中文标题】删除 JSON 数组中对象之间的逗号【英文标题】：Removing the commas between objects in a JSON array 【发布时间】：2017-10-25 09:21:17 【问题描述】：我正在将 JSON 数据加载到 Redshift 中，但要使其正常工作，必须删除对象之间的逗号。如果我删除逗号，那么它工作正常。
谁能告诉我如何删除对象之间的逗号以便我可以将其加载到 Redshift 中？
Redshift 复制命令只允许将对象数组作为行加载。
目前我有这个 JSON：
[
"id":"57e4d12e53a5a",
"body":"asdas",
"published":"Fri,
23 Sep 2016 06:52:30 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,"height":48
,
"id":"57e4d51165d97",
"body":"jackiechanSADAS",
"published":"Fri, 23 Sep 2016 07:09:05 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,
"height":48
,
"id":"asas",
"body":"peterting",
"published":"Fri, 23 Sep 2016 07:09:05 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,
"height":48
]
我需要把它改成这样：
"id":"57e4d12e53a5a",
"body":"asdas",
"published":"Fri,
23 Sep 2016 06:52:30 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,"height":48
"id":"57e4d51165d97",
"body":"jackiechanSADAS",
"published":"Fri, 23 Sep 2016 07:09:05 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,
"height":48
"id":"asas",
"body":"peterting",
"published":"Fri, 23 Sep 2016 07:09:05 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,
"height":48
【问题讨论】：
Array of objects 需要逗号。问题可能是其他原因。
有类似的问题，但方向相反。看这里：***.com/questions/38695977/…
按照他们的documentation，您的预期输出似乎是正确的，但这不是Array of Objects。
【参考方案1】：
你可以：
json 解析你的代码， 在行上循环 将每一行输出为json字符串化作为：
// Your Array as String
let myArray_as_string = `
[
"a": "first", "objet": "with commas"
,
"an": "other", "objet": "2"
,
"a": "third", "objet": "3"
]
`;
// JSON parse the string to get a JS Object
let myArray_as_object = JSON.parse(myArray_as_string);
// Make a string with each stringified row
let myArray_without_commas = myArray_as_object.map( row =>
return JSON.stringify(row);
).join("\n")
// Do something with the result value
console.log(myArray_without_commas);【讨论】：
是的，我可以做到。我正在寻找一些正则表达式来删除它。 类似***.com/questions/39655387/… 使用正则表达式很容易，前提是您的数据是“安全的”（我的意思是：如果您的数据不包含任何“”或“”）。【参考方案2】：let data = [
"id":"57e4d12e53a5a",
"body":"asdas",
"published":"Fri, 23 Sep 2016 06:52:30 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,
"height":48
,
"id":"57e4d51165d97",
"body":"jackiechanSADAS",
"published":"Fri, 23 Sep 2016 07:09:05 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,
"height":48
,
"id":"asas",
"body":"peterting",
"published":"Fri, 23 Sep 2016 07:09:05 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,
"height":48
]
output = data.map(function(e)return JSON.stringify(e,null,2)).join("\n")
console.log(output);如果你已经有一个字符串表示。只要 JSON 对象中没有 JSON 字符串就可以工作。
let data = JSON.stringify([
"id":"57e4d12e53a5a",
"body":"asdas",
"published":"Fri, 23 Sep 2016 06:52:30 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,
"height":48
,
"id":"57e4d51165d97",
"body":"jackiechanSADAS",
"published":"Fri, 23 Sep 2016 07:09:05 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,
"height":48
,
"id":"asas",
"body":"peterting",
"published":"Fri, 23 Sep 2016 07:09:05 +0000",
"type":"chat-message",
"actor":
"displayName":"beau",
"objectType":"person",
"image":
"url":"http://www.gravatar.com/avatar/205e460b479e2e5b48aec07710c08d50?s=80&d=mm&r=g",
"width":48,
"height":48
],null,2);
output = data.replace(/^\[/,"").replace(/]$/,"").replace(/\,[\s]+/g,"\n\n")
console.log(output);【讨论】：
以上是关于删除 JSON 数组中对象之间的逗号的主要内容，如果未能解决你的问题，请参考以下文章