我有這個 obj 陣列
const pressure = [
{
date: "2021-11-03T23:51:55.875Z",
diastolica: 72,
pulsazione: 69,
sistolica: 130,
user: "61830313ba36bf2504df0ec3",
__v: 0,
_id: "6183209bf91a7ed54a76c05e",
},
{
date: "2021-11-03T23:52:09.684Z",
diastolica: 75,
pulsazione: 71,
sistolica: 135,
user: "61830313ba36bf2504df0ec3",
__v: 0,
_id: "618320a9f91a7ed54a76c061",
},
];
我想得到的是一個像這樣格式化的物件陣列
[
{
name: "Sistolica",
data: [130,135],
},
{
name: "Diastolica",
data: [72,75]
},
{
name: "Pulsazione",
data: [69,71],
},
],
用于頂點圖表我發現的解決方案不合適，最重要的是它不可重用，如果我傳遞的陣列與我在輔助函式中指示的鍵不同，那么一切都會變得更糟。誰能幫我這個？我發布了我采用的解決方案，但我知道這真的很糟糕
export const setupGraphSeries = (data) => {
const sistolica = [];
const diastolica = [];
const pulsazione = [];
const formatter = data.map((item) => {
sistolica.push(item["sistolica"]);
diastolica.push(item["diastolica"]);
pulsazione.push(item["pulsazione"]);
return [
{ name: "Sistolica", data: sistolica },
{ name: "Diastolica", data: diastolica },
{ name: "Pulsazione", data: pulsazione },
];
});
return formatter;
};
uj5u.com熱心網友回復：
一種方法是剛剛map覆寫所需屬性的陣列。這確實意味著pressures每個專案映射一次：
const pressure = [
{
date: "2021-11-03T23:51:55.875Z",
diastolica: 72,
pulsazione: 69,
sistolica: 130,
user: "61830313ba36bf2504df0ec3",
__v: 0,
_id: "6183209bf91a7ed54a76c05e",
},
{
date: "2021-11-03T23:52:09.684Z",
diastolica: 75,
pulsazione: 71,
sistolica: 135,
user: "61830313ba36bf2504df0ec3",
__v: 0,
_id: "618320a9f91a7ed54a76c061",
},
];
const params = ["diastolica","pulsazione","sistolica"];
const result = params.map( name => ({
name,
data: pressure.map(x => x[name])
}));
console.log(result);另一種方法是reduce原始跟蹤您是否擁有該專案。這不需要對原始資料進行多次傳遞，但稍微復雜一點：
const pressure = [
{
date: "2021-11-03T23:51:55.875Z",
diastolica: 72,
pulsazione: 69,
sistolica: 130,
user: "61830313ba36bf2504df0ec3",
__v: 0,
_id: "6183209bf91a7ed54a76c05e",
},
{
date: "2021-11-03T23:52:09.684Z",
diastolica: 75,
pulsazione: 71,
sistolica: 135,
user: "61830313ba36bf2504df0ec3",
__v: 0,
_id: "618320a9f91a7ed54a76c061",
},
];
const params = ["diastolica","pulsazione","sistolica"];
const result = Object.values(pressure.reduce( (a,item) => {
for(var i=0;i<params.length;i ){
const name = params[i];
if(!a[name])
a[name] = {name,data:[]}
a[name].data.push(item[name]);
}
return a;
},{}));
console.log(result);轉載請註明出處，本文鏈接：https://www.uj5u.com/gongcheng/347628.html
標籤：javascript 数组
上一篇：回圈遍歷陣列并檢查多個條件