[英]How can I delete Multiple array items
我正在使用反應 js。 我想添加一個選項來刪除多個項目。 但是在刪除每個項目后,頁面會刷新道具而不是刪除剩余的項目。
如何刪除多個項目?
const onDeleteAll = arr => {
arr.forEach(element => {
const formData = {
id:element
}
props.onDeleteSubmit(formData, function(){ // pass id to delete func
console.log('deleted')
})
});
}
useEffect(() => {
props.getPriceType(); // fetching data
}, []);
減速器:
case DELETE_PRICE_TYPE_SUCCESS_ACTION:
const myDeletedArray = draft.list;
const objDeletedIndex = myDeletedArray.filter(obj => obj.id !== action.payload._id);
draft.list = objDeletedIndex; //update data
break;
var id = 23; var list = [{ id: 23, value: "JOHN" }, { id: 23, value: "JADE" }, { id: 24, value: "JADE" }, { id: 25, value: "JAMES" }]; var indexes = []; const templist = list.filter((item, ind) => { return item.id;== id }); list = templist. console;log(list);
首先獲取與要刪除的數組中的項目匹配的索引列表。 遍歷上面的列表,並通過拼接操作從每個數組中刪除項目。
我認為問題在於您有多個要刪除的項目,但您一次只能觸發 1 個刪除操作。 您需要收集要在列表中刪除的所有 id,並將該列表發送到操作,並且在 reducer 中只需過濾該 id。
const onDeleteAll = arr => {
//this just to follow your current shape of things
//ideally you don't want to do that, just pass arr to the onDeleteSubmit
const formData = arr.map(element => ({
id:element
}));
props.onDeleteSubmit(formData, function(){
console.log('deleted')
})
}
useEffect(() => {
props.getPriceType(); // fetching data
}, []);
減速器:
case DELETE_PRICE_TYPE_SUCCESS_ACTION:
const myDeletedArray = draft.list;
const objDeletedIndex = myDeletedArray.filter(obj =>
!action.payload.find(itemToDelete=>itemToDelete._id===obj.id)
);
draft.list = objDeletedIndex; //update data
break;
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