[英]Swift - Convert Array to Dictionary Based on Custom Condition
如果我有以下形式的对象数组:
[{ userId: 3, data: "bla bla"} , { userId: 2, data: "bla bla"}, { userId: 3, data: "bla bla2"}, { userId: 1, data: "bla bla"}, { userId: 1, data: "bla bla2"}]
我可以将其转换为以userId
为键的字典,如下所示:
let dict = Dictionary(grouping: myData, by: {$0.userId})
但是如果我知道我的用户有userId
3
并且我想创建一个这样的字典怎么办:
{
key: "me",
value: [{ userId: 3, data: "bla bla"},{ userId: 3, data: "bla bla2"}],
key: "others",
value: [{ userId: 2, data: "bla bla"}, { userId: 1, data: "bla bla"}, { userId: 1, data: "bla bla2"}]
}
grouping:by:
在这里仍然可以提供帮助! 关键是"me"
或"others"
let dict = Dictionary(grouping: myData, by: {$0.userId == 3 ? "me" : "others"})
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