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
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;
});
其他回答
这是我的解决方案https://gist.github.com/4692150深度相等且易于使用的结果:
function merge_arrays(arr1,arr2)
{
...
return {first:firstPart,common:commonString,second:secondPart,full:finalString};
}
console.log(merge_arrays(
[
[1,"10:55"] ,
[2,"10:55"] ,
[3,"10:55"]
],[
[3,"10:55"] ,
[4,"10:55"] ,
[5,"10:55"]
]).second);
result:
[
[4,"10:55"] ,
[5,"10:55"]
]
只需使用Undercore.js的=>uniq即可实现:
array3 = _.uniq(array1.concat(array2))
console.log(array3)
它将印刷[“Vijendra”、“Singh”、“Shakya”]。
[...array1,...array2] // => don't remove duplication
OR
[...new Set([...array1 ,...array2])]; // => remove duplication
var MergeArrays=function(arrayOne, arrayTwo, equalityField) {
var mergeDictionary = {};
for (var i = 0; i < arrayOne.length; i++) {
mergeDictionary[arrayOne[i][equalityField]] = arrayOne[i];
}
for (var i = 0; i < arrayTwo.length; i++) {
mergeDictionary[arrayTwo[i][equalityField]] = arrayTwo[i];
}
return $.map(mergeDictionary, function (value, key) { return value });
}
利用字典和Jquery,您可以合并这两个数组,而不会得到重复项。在我的示例中,我在对象上使用给定的字段,但可能只是对象本身。
Array.prototype.union = function (other_array) {
/* you can include a test to check whether other_array really is an array */
other_array.forEach(function(v) { if(this.indexOf(v) === -1) {this.push(v);}}, this);
}