如何检查数组中,除了重复的javascript 0 [英] How to check duplicates in array except 0 javascript

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问题描述

我有一个变量数据对象的数组。现在我要检查是否有除0。重复值是什么我迄今所做低于code片断:

警报显示我真应该是假性因果0不包括检查。请帮忙。谢谢

\r
\r

VAR数据= {[ID:0},{ID:1},{ ID:3},{ID:0}]。\r
            \r
            \r
VAR checkdata = Data.Map中(函数(项目){\r
返回item.id});\r
VAR isDuplicatedata = checkdata.some(函数(项目,IDX){\r
    返回checkdata.indexOf(项目)!= IDX\r
});\r
            \r
警报(isDuplicatedata)\r
 

\r

\r
\r


解决方案

对象无法相比其他基本型相比的方式。

我写了一个函数来解决你的要求,其从你实现什么完全不同和在性能和实用性方面,它可能是不好

  VAR数据= {[ID:0},{ID:1},{ID:2},{ID:0},{ID:3}];功能isDuplicatedata(){
  对于(VAR I = 0; I< data.length;我++){
    如果(数据[I] .ID === 0)
      继续;
    对于(VAR J = I + 1; J< data.length; J ++){
      如果(数据[J] .ID ===数据[I] .ID)
        返回true;
    }
  }
  返回false;
}警报(isDuplicatedata())

I have a variable data a array of objects. Now I want to check if there a duplicates values except 0. What I've done so far is the code snippet below:

The alert shows me true it should be false cause 0 is not included for checking. Please help. Thanks

var data = [{id: 0},  {id: 1}, {id: 3}, {id: 0},];
            
            
var checkdata= data.map(function(item){ 
return item.id });
var isDuplicatedata= checkdata.some(function(item, idx){ 
    return checkdata.indexOf(item) != idx 
});
            
alert(isDuplicatedata)
 

解决方案

Object cannot be compared the way other primitive type compared.

i wrote a function to solve what you asked, its completely different from what you implemented and it may be not good in terms of performance and practicality

var data = [{id: 0},  {id: 1}, {id: 2}, {id: 0},{id: 3}];

function isDuplicatedata() {            
  for(var i = 0; i < data.length; i++) {
    if(data[i].id === 0)
      continue;
    for(var j = i+1; j < data.length; j++) {
      if(data[j].id === data[i].id)
        return true;
    }
  }
  return false;
}

alert(isDuplicatedata())

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