从 JSON 创建数组 - Javascript
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Create array from JSON - Javascript
提问by gberg927
I have a JSON file that I would like to create an array from.
我有一个 JSON 文件，我想从中创建一个数组。
Here is the JSON data.
这是 JSON 数据。
{
"table": {
"columnNames": ["column1", "column2", "column3", "column4"],
"columnTypes": ["String", "String", "String", "String"],
"rows": [
["data00", "data01", "data02", "data03"],
["data10", "data11", "data12", "data13"],
["data20", "data21", "data22", "data23"],
["data30", "data31", "data32", "data33"]
]
}
}
I need to create an array from the objects in the "rows" section.
我需要从“行”部分中的对象创建一个数组。
Any help would be appreciated!
任何帮助，将不胜感激！
Thanks!!!
谢谢！！！
EDIT
编辑
Would it be possible to create a hash table out of the data in rows? Also, how would you perform JSON.parse on a json file? Thanks
是否可以从行中的数据中创建一个哈希表？另外，您将如何对 json 文件执行 JSON.parse？谢谢
回答by lonesomeday
Do you mean you want to get a single array holding all the values?
你的意思是你想得到一个包含所有值的数组？
var rows = [];
for (var i = 0; i < data.table.rows.length; i++) {
rows.push.apply(rows, data.table.rows[i]);
}
See MDN docs for pushand apply.
This assumes that you've stored the data from your question in a variable data. If you only have it as a JSON string, you'll need to convert it with JSON.parse.
这假设您已将问题中的数据存储在变量中data。如果您只将其作为 JSON 字符串，则需要将其转换为JSON.parse.
回答by Marc B
JSON is basically javascript already, so once you've decoded the JSON stringback to a native JS data structure, then it'd be a simple matter of doing:
JSON 基本上已经是 javascript 了，所以一旦你将 JSON 字符串解码回原生 JS 数据结构，那么就很简单了：
var rowsarray = decoded_json.table.rows;
