首頁猿問如何獲取數(shù)組中的公共值

如何獲取數(shù)組中的公共值

JavaScript

慕的地6264312 2023-06-29 21:12:05

例如我有一個(gè)數(shù)據(jù)數(shù)組如下var arrData = ["40-25",null,null,"40-25","50-48",null,"30-25","40-23","50-48","30-25",null,"50-48","40-45","40-45","40-45","40-50","40-50",null,null,null,null,null,"50-48"]我需要在 javascript 中列出與下面相同的數(shù)據(jù)var arrDataSorted = ["40-25","50-48","30-25","40-23","40-45","40-50","40-50"]只需要?jiǎng)h除復(fù)制空值的公共數(shù)據(jù)。解決這個(gè)問題的最佳解決方案是什么。

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4 回答

holdtom

TA貢獻(xiàn)1805條經(jīng)驗(yàn) 獲得超10個(gè)贊

您可以嘗試使用Array.prototype.filter()刪除空值并Set獲取唯一值。最后使用來Spread syntax (...)將集合結(jié)果轉(zhuǎn)換為數(shù)組。

嘗試以下方法：

var arrData = ["40-25",null,null,"40-25","50-48",null,"30-25","40-23","50-48","30-25",null,"50-48","40-45","40-45","40-45","40-50","40-50",null,null,null,null,null,"50-48"];

var arrDataSorted = [...new Set(arrData.filter(i => i))];

console.log(arrDataSorted);

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海綿寶寶撒

TA貢獻(xiàn)1809條經(jīng)驗(yàn) 獲得超8個(gè)贊

您可以從數(shù)組創(chuàng)建一個(gè)集合，該集合將自動(dòng)刪除重復(fù)項(xiàng)：

let arrData = ["40-25",null,null,"40-25","50-48",null,"30-25","40-23","50-48","30-25",null,"50-48","40-45","40-45","40-45","40-50","40-50",null,null,null,null,null,"50-48"];

let set = new Set(arrData);

這仍然會(huì)保留 null，您可以通過調(diào)用將其刪除delete，并使用擴(kuò)展運(yùn)算符將其轉(zhuǎn)換回?cái)?shù)組...。最終代碼將是：

let set = new Set(arrData);

set.delete(null);

let distinctArr = [...set];

反對(duì) 回復(fù) 2023-06-29

紫衣仙女

TA貢獻(xiàn)1839條經(jīng)驗(yàn) 獲得超15個(gè)贊

將此函數(shù)添加到您的代碼中：

function removeCommonValues(arr) {

let result = [];

for(let i=0; i < arr.length-1; ++i) {

if(result.includes(arr[i]) === false && arr[i] !== null)

result.push(arr[i])

}

return result

}

用法：

removeCommonValues(["40-25",null,null,"40-25","50-48",null,"30-25","40-23","50-48","30-25",null,"50-48","40-45","40-45","40-45","40-50","40-50",null,null,null,null,null,"50-48"]) // Return ["40-25", "50-48", "30-25", "40-23", "40-45", "40-50"]

反對(duì) 回復(fù) 2023-06-29

慕神8447489

TA貢獻(xiàn)1780條經(jīng)驗(yàn) 獲得超1個(gè)贊

該函數(shù)可以位于單獨(dú)的文件中，以便在多個(gè)頁面之間重用。然后您可以調(diào)用該函數(shù)來過濾不為空的不同值。

var arrData = ["40-25",null,null,"40-25","50-48",null,"30-25","40-23","50-48","30-25",null,"50-48","40-45","40-45","40-45","40-50","40-50",null,null,null,null,null,"50-48"];

function fn(value,index,self){

return self.indexOf(value) === index && value;

}

console.log(arrData.filter(fn));

反對(duì) 回復(fù) 2023-06-29

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如何獲取數(shù)組中的公共值

如何獲取數(shù)組中的公共值

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