我有两个JavaScript数组：
var array1 = ["Vijendra","Singh"];
var array2 = ["Singh", "Shakya"];
我希望输出为：
var array3 = ["Vijendra","Singh","Shakya"];
输出数组应删除重复的单词。
如何在JavaScript中合并两个数组，以便从每个数组中只获得唯一的项目，其顺序与它们插入原始数组的顺序相同？
当前回答
之前写过同样的原因（适用于任意数量的数组）：
/**
* Returns with the union of the given arrays.
*
* @param Any amount of arrays to be united.
* @returns {array} The union array.
*/
function uniteArrays()
{
var union = [];
for (var argumentIndex = 0; argumentIndex < arguments.length; argumentIndex++)
{
eachArgument = arguments[argumentIndex];
if (typeof eachArgument !== 'array')
{
eachArray = eachArgument;
for (var index = 0; index < eachArray.length; index++)
{
eachValue = eachArray[index];
if (arrayHasValue(union, eachValue) == false)
union.push(eachValue);
}
}
}
return union;
}
function arrayHasValue(array, value)
{ return array.indexOf(value) != -1; }
其他回答
ES 6版本
试试这个。。。这应该能解决你的问题
var array1=[“Vijendra”，“Singh”]；var array2=[“Singh”，“Shakya”]；
var输出=[…new Set（[…array1，…array2]）]
console.log（“合并数组”，输出）
之前写过同样的原因（适用于任意数量的数组）：
/**
* Returns with the union of the given arrays.
*
* @param Any amount of arrays to be united.
* @returns {array} The union array.
*/
function uniteArrays()
{
var union = [];
for (var argumentIndex = 0; argumentIndex < arguments.length; argumentIndex++)
{
eachArgument = arguments[argumentIndex];
if (typeof eachArgument !== 'array')
{
eachArray = eachArgument;
for (var index = 0; index < eachArray.length; index++)
{
eachValue = eachArray[index];
if (arrayHasValue(union, eachValue) == false)
union.push(eachValue);
}
}
}
return union;
}
function arrayHasValue(array, value)
{ return array.indexOf(value) != -1; }
合并无限数量的数组或非数组并保持其唯一性：
function flatMerge() {
return Array.prototype.reduce.call(arguments, function (result, current) {
if (!(current instanceof Array)) {
if (result.indexOf(current) === -1) {
result.push(current);
}
} else {
current.forEach(function (value) {
console.log(value);
if (result.indexOf(value) === -1) {
result.push(value);
}
});
}
return result;
}, []);
}
flatMerge([1,2,3], 4, 4, [3, 2, 1, 5], [7, 6, 8, 9], 5, [4], 2, [3, 2, 5]);
// [1, 2, 3, 4, 5, 7, 6, 8, 9]
flatMerge([1,2,3], [3, 2, 1, 5], [7, 6, 8, 9]);
// [1, 2, 3, 5, 7, 6, 8, 9]
flatMerge(1, 3, 5, 7);
// [1, 3, 5, 7]
[...array1,...array2] // => don't remove duplication
OR
[...new Set([...array1 ,...array2])]; // => remove duplication
为什么不使用对象？看起来你在尝试建立一套模型。然而，这并不能维持秩序。
var set1 = {"Vijendra":true, "Singh":true}
var set2 = {"Singh":true, "Shakya":true}
// Merge second object into first
function merge(set1, set2){
for (var key in set2){
if (set2.hasOwnProperty(key))
set1[key] = set2[key]
}
return set1
}
merge(set1, set2)
// Create set from array
function setify(array){
var result = {}
for (var item in array){
if (array.hasOwnProperty(item))
result[array[item]] = true
}
return result
}
