我有一个非常简单的JavaScript数组，可能包含也可能不包含重复项。
var names = ["Mike","Matt","Nancy","Adam","Jenny","Nancy","Carl"];
我需要删除重复项并将唯一值放入新数组。
我可以指出我尝试过的所有代码，但我认为它们没有用，因为它们不起作用。我也接受jQuery解决方案。
类似的问题：
获取数组中的所有非唯一值（即：重复/多次出现）
当前回答
var duplicates = function(arr){
var sorted = arr.sort();
var dup = [];
for(var i=0; i<sorted.length; i++){
var rest = sorted.slice(i+1); //slice the rest of array
if(rest.indexOf(sorted[i]) > -1){//do indexOf
if(dup.indexOf(sorted[i]) == -1)
dup.push(sorted[i]);//store it in another arr
}
}
console.log(dup);
}
duplicates(["Mike","Matt","Nancy","Adam","Jenny","Nancy","Carl"]);
其他回答
因此，选项如下：
let a = [11,22,11,22];
let b = []
b = [ ...new Set(a) ];
// b = [11, 22]
b = Array.from( new Set(a))
// b = [11, 22]
b = a.filter((val,i)=>{
return a.indexOf(val)==i
})
// b = [11, 22]
var uniqueCompnies = function(companyArray) {
var arrayUniqueCompnies = [],
found, x, y;
for (x = 0; x < companyArray.length; x++) {
found = undefined;
for (y = 0; y < arrayUniqueCompnies.length; y++) {
if (companyArray[x] === arrayUniqueCompnies[y]) {
found = true;
break;
}
}
if ( ! found) {
arrayUniqueCompnies.push(companyArray[x]);
}
}
return arrayUniqueCompnies;
}
var arr = [
"Adobe Systems Incorporated",
"IBX",
"IBX",
"BlackRock, Inc.",
"BlackRock, Inc.",
];
$(document).ready(function() {
var arr1=["dog","dog","fish","cat","cat","fish","apple","orange"]
var arr2=["cat","fish","mango","apple"]
var uniquevalue=[];
var seconduniquevalue=[];
var finalarray=[];
$.each(arr1,function(key,value){
if($.inArray (value,uniquevalue) === -1)
{
uniquevalue.push(value)
}
});
$.each(arr2,function(key,value){
if($.inArray (value,seconduniquevalue) === -1)
{
seconduniquevalue.push(value)
}
});
$.each(uniquevalue,function(ikey,ivalue){
$.each(seconduniquevalue,function(ukey,uvalue){
if( ivalue == uvalue)
{
finalarray.push(ivalue);
}
});
});
alert(finalarray);
});
function arrayDuplicateRemove(arr){
var c = 0;
var tempArray = [];
console.log(arr);
arr.sort();
console.log(arr);
for (var i = arr.length - 1; i >= 0; i--) {
if(arr[i] != tempArray[c-1]){
tempArray.push(arr[i])
c++;
}
};
console.log(tempArray);
tempArray.sort();
console.log(tempArray);
}
快速简便地使用lodash-var array=[“12346”，“12347”，“1234”，“23449”，“123459”]；console.log（_.uniqWith（array，_.isEqual））；
