我有以下物件陣列。
[
{ claimNumber1: 'R12345', checkNumber1: '' },
{ claimNumber2: 'T1234', checkNumber2: 'abcd' },
{ claimNumber3: 'Z4567', checkNumber3: 'qwer' }
]
使用reduce，我想將其轉換為以下內容。
{
claimNumber1:'R12345',
checkNumber1:'',
claimNumber2:'T1234',
checkNumber2:'',
claimNumber3:'Z4567',
checkNumber3:'',
}
我在下面嘗試過，但沒有得到我的預期。
.reduce((obj, item) =>{
return {...obj,item}
} ,{});
uj5u.com熱心網友回復：
你應該傳播item物件，因為item是一個物件
const arr = [
{ claimNumber1: "R12345", checkNumber1: "" },
{ claimNumber2: "T1234", checkNumber2: "abcd" },
{ claimNumber3: "Z4567", checkNumber3: "qwer" },
];
const result = arr.reduce((obj, item, i) => {
return { ...obj, ...item, [`checkNumber${i 1}`]: "" };
}, {});
console.log(result);uj5u.com熱心網友回復：
差不多好了。你只需要spread在item為好。
.reduce((obj, item) => {
return {
...obj,
...item,
};
}, {});
uj5u.com熱心網友回復：
我認為你應該在減速機中傳播每一項。這是我的代碼。
const res = arr.reduce((prev, item) => {
return { ...prev, ...item };
}, {});
結果是
{
claimNumber1: 'R12345',
checkNumber1: '',
claimNumber2: 'T1234',
checkNumber2: 'abcd',
claimNumber3: 'Z4567',
checkNumber3: 'qwer'
}
uj5u.com熱心網友回復：
我不確定reduce在這種情況下使用的好處。一個簡單的回圈將是自我記錄的，并且更容易閱讀。
const data = [
{ claimNumber1: 'R12345', checkNumber1: '' },
{ claimNumber2: 'T1234', checkNumber2: 'abcd' },
{ claimNumber3: 'Z4567', checkNumber3: 'qwer' }
];
const out = {};
// For every object in the array
for (const obj of data) {
// Get an array of its keys and iterate over them
for (const key of Object.keys(obj)) {
// If it's a claim add that value to the output
// object property, otherwise set that property value
// to an empty string.
if (key.startsWith('claim')) {
out[key] = obj[key];
} else {
out[key] = '';
}
}
}
console.log(out);附加檔案
Object.keys
轉載請註明出處，本文鏈接：https://www.uj5u.com/net/370415.html
標籤：javascript 节点.js