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?
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
用法:https://gist.github.com/samad-aghaei/7250ffb74ed80732debb1cbb14d2bfb0
var _uniqueMerge = function(opts, _ref){
for(var key in _ref)
if (_ref && _ref[key] && _ref[key].constructor && _ref[key].constructor === Object)
_ref[key] = _uniqueMerge((opts ? opts[key] : null), _ref[key] );
else if(opts && opts.hasOwnProperty(key))
_ref[key] = opts[key];
else _ref[key] = _ref[key][1];
return _ref;
}
其他回答
作为LiraNuna的一部分的单线解决方案:
let array1 = ["Vijendra","Singh"];
let array2 = ["Singh", "Shakya"];
// Merges both arrays
let array3 = array1.concat(array2);
//REMOVE DUPLICATE
let removeDuplicate = [...new Set(array3)];
console.log(removeDuplicate);
我简化了这个答案的最佳部分,并将其转化为一个很好的函数:
function mergeUnique(arr1, arr2){
return arr1.concat(arr2.filter(function (item) {
return arr1.indexOf(item) === -1;
}));
}
下面是使用Set的另一个简单解决方案:
常量o1={a:1};const arr1=['!@#$%^&*()','gh',123,o1,1,true,undefined,null];常量arr2=['!@#$%^&*()',123,'abc',o1,0x001,true,void 0,0];const mergeUnique=(…args)=>[…新集合([].contat(…arg))];console.log(mergeUnique(arr1,arr2));
如果您有非常大的列表,则不执行此操作,因为已经记录了许多解决方案,所以这不适合合并,但我用此解决方案解决了我的问题(因为大多数数组过滤解决方案都适用于简单数组)
const uniqueVehiclesServiced =
invoice.services.sort().filter(function(item, pos, ary) {
const firstIndex = invoice.services.findIndex((el, i, arr) => el.product.vin === item.product.vin)
return !pos || firstIndex == pos;
});
模块化,通用
这可以通过组成两个基本功能来实现。
const getUniqueMerge = (...arrs) => getUniqueArr(mergeArrs(...arrs))
const getUniqueArr = (array) => Array.from(new Set(array))
const mergeArrs = (...arrs) => [].concat(...arrs)
它可以处理无限的数组或值
console.log(getUniqueMerge(["Vijendra","Singh"],["Singh", "Shakya"])
// ["Vijendra", "Singh", "Shakya"]
console.log(getUniqueMerge(["Sheldon", "Cooper"], ["and", "Cooper", "Amy", "and"], "Farrah", "Amy", "Fowler"))
// ["Sheldon", "Cooper", "and", "Amy", "Farrah", "Fowler"]