在这种模式下,我有一些聊天记录: { id:UUID chatId:字符串, 日期:字符串|日期 文字:字串 } 另外,我有一些要在特定条件下计数的字符串(短语)。
我想获取短语的数量并获取与其中一个短语相对应的最后一条消息。
例如:
const phrases = ["hello to all", "dog & cat"]
const Chats = [
{
id: "UUID-1",
chatId: "1",
date: "1-1-2016",
message: "hello world to all, hello to all, dog & cat 1"
},
{
id: "UUID-2",
chatId: "1",
date: "1-1-2015",
message: "hello world to all, hello to all, dog & cat 2"
},
{
id: "UUID-3",
chatId: "2",
date: "1-1-2016",
message: "dog & cat"
},
{
id: "UUID-4",
chatId: "2",
date: "1-1-2016",
message: "hello to all"
},
{
id: "UUID-5",
chatId: "3",
date: "1-1-2015",
message: "abc"
}
]
对于上面的示例,我想得到结果:
[
{
chatId: 1,
lastMessage: {
id: "UUID-1",
chatId: "1",
date: "1-1-2016",
message: "hello world to all, hello to all, dog & cat 1"
},
count: {
“hello to all”: 2,
“dog & cat” : 2
}
},
{
chatId: 2,
lastMessage: {
id: "UUID-3",
chatId: "2",
date: "1-1-2016",
message: "dog & cat"
},
count: {
“hello to all”: 1,
“dog & cat” : 1
}
},
]