[英]Search/Filter JavaScript Object Array
我正在嘗試創建一個搜索/過濾器函數,它允許用戶過濾一個 JS 對象數組,該數組返回一個填充了與搜索查詢匹配的數據的數組。
例如,我希望能夠在一個查詢中搜索多個屬性; 如果我搜索HKG
,它將返回所有 3 個對象,但如果我搜索HKG 12345
,它將返回數組中的第一個對象。
另一個示例是,如果我要搜索8
,它將從與查詢匹配的sumOfContainers
屬性返回數組中的前 2 個對象,但如果我搜索8 SAV
,它將僅返回第一個對象。
results = [];
objects = [
{laneId:"12345", lane:"HKG-SAV", equipmentType:"20'STD", sumOfContainers: "8", baseline:"$1234", new:"$1234", newSaving:"$1234"},
{laneId:"12346", lane:"HKG-FRA", equipmentType:"20'STD", sumOfContainers: "8", baseline:"$1234", new:"$1234", newSaving:"$1234"},
{laneId:"12347", lane:"HKG-LAX", equipmentType:"20'STD", sumOfContainers: "9", baseline:"$1234", new:"$1234", newSaving:"$1234"},
];
const Search = (toSearch) => {
for(var i=0; i<objects.length; i++) {
for(key in objects[i]) {
if(objects[i][key].indexOf(toSearch)!=-1) {
results.push(objects[i]);
}
}
}
}
我嘗試的問題是它會返回重復的數據。 我在網上遇到了很多帖子,但我發現很難找到尋求類似結果的帖子。
我正在嘗試使用本機 JavaScript 來實現這一點。
一些問題:
添加重復項是因為在添加對象后,您會繼續在同一對象中尋找更多匹配項。 所以如果有任何其他鍵匹配,相同的對象將被添加兩次
當搜索包含空格時,您的描述說您希望將其視為多個搜索詞的分隔符,但您的代碼永遠不會像那樣拆分搜索參數。
您的函數中沒有return
語句
關鍵變量沒有用var
、 let
或const
我建議用filter
解決這個問題:這保證你不會得到重復。 然后要求所有搜索詞都匹配:為此,您可以使用split
和every
。 然后要求至少有一個與搜索詞匹配的鍵:為此,您可以使用some
:
不要用 PascalCase 命名你的搜索函數,而是用駝峰命名(所以用search
而不是Search
)。 通常的做法是 PascalCase 保留用於構造函數/類名稱。
const search = toSearch => {
let terms = toSearch.split(" ");
return objects.filter(object =>
terms.every(term =>
Object.values(object).some(value =>
value.includes(term)
)
)
);
}
我想出了一種非常糟糕的方法來實現問題中的條件。 如果有人可以使此代碼更加優化,那就太棒了。
const search = () => {
let toSearch = document.getElementById("search").value;
let lanes = this.objects;
let result = [];
const filters = toSearch.split(" ");
for(let i = 0; i <lanes.length; i++) {
let search = "";
let isMatched = true;
for(let key in lanes[i]) {
search += lanes[i][key] + " ";
}
filters.forEach(filter => {
if(search.indexOf(filter) == -1) {
isMatched = false;
break;
}
});
if(isMatched) {
result.push(lanes[i]);
}
}
return result;
}
如果你不介意lodash :
const _ = require('lodash');
const objects = [
{laneId:"12345", lane:"HKG-SAV", equipmentType:"20'STD", sumOfContainers: "8", baseline:"$1234", new:"$1234", newSaving:"$1234"},
{laneId:"12346", lane:"HKG-FRA", equipmentType:"20'STD", sumOfContainers: "8", baseline:"$1234", new:"$1234", newSaving:"$1234"},
{laneId:"12347", lane:"HKG-LAX", equipmentType:"20'STD", sumOfContainers: "9", baseline:"$1234", new:"$1234", newSaving:"$1234"},
];
const mySearch = (arr, text) => {
const includesValue = (word, obj) => _.some(obj, (value) => _.includes(value, word));
const words = _.words(text);
return arr
.filter((obj) =>
words.every((word) =>
includesValue(word, obj)
)
);
};
console.log(mySearch(objects, 'HKG 12345'));
// [{laneId: '12345', lane: 'HKG-SAV', equipmentType: "20'STD", sumOfContainers: '8', baseline: '$1234', new: '$1234', newSaving: '$1234' }]
console.log(mySearch(objects, '8'));
// [
// {laneId:"12345", lane:"HKG-SAV", equipmentType:"20'STD", sumOfContainers: "8", baseline:"$1234", new:"$1234", newSaving:"$1234"},
// {laneId:"12346", lane:"HKG-FRA", equipmentType:"20'STD", sumOfContainers: "8", baseline:"$1234", new:"$1234", newSaving:"$1234"},
// ]
console.log(mySearch(objects, '8 SAV'));
// [{laneId: '12345', lane: 'HKG-SAV', equipmentType: "20'STD", sumOfContainers: '8', baseline: '$1234', new: '$1234', newSaving: '$1234' }]
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