从 Json 数据分组，其中包含 Swift 中的字典数组 4
Grouping from Json data, which contain array of dictionaries in Swift 4
我有本地 json 文件，其中包含字典数组。我想根据 json 下面的键名进行分组。表示一组中的相同名称。请告诉我我怎样才能做到这一点。谢谢你。
Json数据：
[
{
"name": "Abc",
"number": 123,
"marks": 78
},
{
"name": "xyz",
"number": 456,
"marks": 50
},
{
"name": "Abc",
"number": 789,
"marks": 78
}
]
代码：
code and error message
您应该 return 闭包中 name 键的值。
let arr = [ [ "name": "Abc", "number": 123, "marks": 78 ], [ "name": "xyz", "number": 456, "marks": 50 ], [ "name": "Abc", "number": 789, "marks": 78 ] ]
let dict = Dictionary(grouping: arr) { [=10=]["name"] as! String }
print(dict)
//["Abc": [["name": "Abc", "number": 123, "marks": 78], ["name": "Abc", "number": 789, "marks": 78]], "xyz": [["name": "xyz", "number": 456, "marks": 50]]]
我有本地 json 文件，其中包含字典数组。我想根据 json 下面的键名进行分组。表示一组中的相同名称。请告诉我我怎样才能做到这一点。谢谢你。
Json数据：
[ { "name": "Abc", "number": 123, "marks": 78 }, { "name": "xyz", "number": 456, "marks": 50 }, { "name": "Abc", "number": 789, "marks": 78 } ]
代码：
code and error message
您应该 return 闭包中 name 键的值。
let arr = [ [ "name": "Abc", "number": 123, "marks": 78 ], [ "name": "xyz", "number": 456, "marks": 50 ], [ "name": "Abc", "number": 789, "marks": 78 ] ]
let dict = Dictionary(grouping: arr) { [=10=]["name"] as! String }
print(dict)
//["Abc": [["name": "Abc", "number": 123, "marks": 78], ["name": "Abc", "number": 789, "marks": 78]], "xyz": [["name": "xyz", "number": 456, "marks": 50]]]