所以，我有 2 個由產品組成的物件，主要的和次要的，我做了一個回圈搜索主要的，如果它沒有找到產品，它會從次要中洗掉，即使有 10它作業的產品，現在我有 1470 個產品，回圈在第 4 次重復停止并說 << Uncaught TypeError: Cannot read properties of undefined (reading 'name') >> ，這是代碼
function deleter(){
let main = main_products;
let secondary= secondary_products;
let i;
let counter = 0;
console.log(main);
console.log(secondary); // just to be sure the data is ok
for (i=0;i<1550;i ){
counter = 0;
while (secondary[i].name !== main[counter].name){
counter ;
if (counter === 1550){
break ;
} // i did this with break i dont know why i did though
}
if (secondary[i].name === main[counter].name){
console.log("found -> " secondary[i].name);
}
else {
console.log("did not find product -> " secondary[i].name " on the main database . . . ");console.log("initializing product deletion . . .");
console.log(secondary[i].id);
deletedata();
document.getElementById("delete").innerHTML = "Done ??";
}
}
}
當我回圈 10 個產品時，它每次都能正常作業。既然產品明顯更多，我還需要做其他事情嗎？
編輯
所以這些物件是這樣制作的，我從 woocommerce 獲取
[ {“id”：67537，“name”：“test 10”，“slug”：“”，“type”：“simple”，“status”：“draft”，“featured”：false，“catalog_visibility”： “可見”，“描述”：“
阿拉吉
\n", "short_description": "", "sku": "1230975071-1-1-1-1-1-1-1-1-1", "price": "123122", "regular_price": " 123123”，“sale_price”：“123122”} {“id”：67536，“name”：“test 9”，“slug”：“”，“type”：“simple”，“status”：“draft”， “特色”：假，“目錄可見性”：“可見”，“描述”：“阿拉吉
\n", "short_description": "", "sku": "1230975071-2", "price": "123122", "regular_price": "123123", "sale_price": "123122"}]
這是一張圖片
兩個物件都來自 woo
uj5u.com熱心網友回復：
問題是 - 您超出了產品陣列的范圍。它是由以下原因引起的：
- 您有 1470 個產品，但對于 (i = 0; i < 1550; i )迭代超過 1550 個。可以用for (i = 0; i < secondary.length; i )固定
- 沒有額外的檢查我們是否有下一個元素或不在 while 回圈中
所以我想固定和優化版本的代碼可能看起來像這樣：
const main_products = [{id: 1, name: 'blabla1'}, {id: 2, name: 'blabla2'}, {id: 3, name: 'blabla3'}];
const secondary_products = [{id: 2, name: 'blabla2'}, {id: 4, name: 'blabla4'}, {id: 5, name: 'blabla5'}];
deleter();
function deleter() {
let main = main_products;
let secondary = secondary_products;
for (let i = 0; i < secondary.length; i ) {
const productWeFound = main.find((product) => secondary[i].name === product.name);
if (productWeFound) {
console.log("found -> " secondary[i].name);
} else {
console.log("did not find product -> " secondary[i].name " on the main database . . . ");
console.log("initializing product deletion . . .");
console.log(secondary[i].id);
// deletedata();
// document.getElementById("delete").innerHTML = "Done ??";
}
}
}轉載請註明出處，本文鏈接：https://www.uj5u.com/qianduan/491301.html
標籤：javascript
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