如何在javascript中验证和比较重复的数组

我将输入的值存储在变量中，并将它们保存在数组中

我想比较是否输入了任何重复的旅行id，如果输入了重复的旅行id及其相应的邮政编码，则添加红色错误

<p>
  <input id="tripcode1" value="tripcode1">
  <input id="zipcode1" value="zipcode1">
</p>
<p>
  <input id="tripcode2" value="tripcode2">
  <input id="zipcode2" value="zipcode2">
</p>
<p>
  <input id="tripcode3" value="">
  <input id="zipcode3" value="">
</p>
<p>
  <input id="tripcode4" value="">
  <input id="zipcode4" value="">
</p>
<p>
  <input id="tripcode5" value="">
  <input id="zipcode5" value="">
</p>
<a href="javascript:validateTripID();">Submit</a>
<script>
  function validateTripID() {
    var tripcode1 = document.getElementById("tripcode1").value;
    var zipcode1 = document.getElementById("zipcode1").value;
    var tripcode2 = document.getElementById("tripcode2").value;
    var zipcode2 = document.getElementById("zipcode2").value;
    var tripcode3 = document.getElementById("tripcode3").value;
    var zipcode3 = document.getElementById("zipcode3").value;
    var tripcode4 = document.getElementById("tripcode4").value;
    var zipcode4 = document.getElementById("zipcode4").value;
    var tripcode5 = document.getElementById("tripcode5").value;
    var zipcode5 = document.getElementById("zipcode5").value;
    var tripIDArray = [
      [tripcode1,zipcode1],
      [tripcode2,zipcode2],
      [tripcode3,zipcode3],
      [tripcode4,zipcode4],
      [tripcode5,zipcode5]
    ];
    var tripArrayLength = tripIDArray.length;
    var Z = 0;
    for (var i=0; i < tripArrayLength; i++) {
      var a = tripIDArray[Z][0];
      for  (var k=0 ; k < tripArrayLength; K++) {
        var b = tripIDArray[k][0];
        k++;
        if (a === b) {
            alert(a);
        }
      }
      Z = Z+1;
    }
  }
</script>

函数validateTripID（）{
var tripcode1=document.getElementById（“tripcode1”）.value；
var zipcode1=document.getElementById（“zipcode1”）.value；
var tripcode2=document.getElementById（“tripcode2”）.value；
var zipcode2=document.getElementById（“zipcode2”）.value；
var tripcode3=document.getElementById（“tripcode3”）.value；
var zipcode3=document.getElementById（“zipcode3”）.value；
var tripcode4=document.getElementById（“tripcode4”）.value；
var zipcode4=document.getElementById（“zipcode4”）.value；
var tripcode5=document.getElementById（“tripcode5”）.value；
var zipcode5=document.getElementById（“zipcode5”）.value；
变量Tripidaray=[
[tripcode1，zipcode1]，
[tripcode2，zipcode2]，
[tripcode3，zipcode3]，
[tripcode4，zipcode4]，
[tripcode5，zipcode5]
];
var tripArrayLength=tripIDArray.length；
var Z=0；
对于（var i=0；i

给你！请参阅JSFIDLE链接

函数validateTripID（）{
var tripcode1=document.getElementById（“tripcode1”）.value；
var zipcode1=document.getElementById（“zipcode1”）.value；
var tripcode2=document.getElementById（“tripcode2”）.value；
var zipcode2=document.getElementById（“zipcode2”）.value；
变量Tripidaray=[
[tripcode1，zipcode1]，
[tripcode2，zipcode2]
];
var tripArrayLength=tripIDArray.length；
var Z=0；
对于（var i=0；i

我没有完全得到您想要的，但请检查以下内容：

如果要检查邮政编码，只需更改以下内容：

// change this var a = tripIDArray[i] to 
var a = tripIDArray[i];
...
var b = tripIDArray[k];
...
//change if statement to 
if (a[0]===b[0] && a[1]===b[1]) ...

---

我已经更新了你的提琴以找到重复的tripcode条目。根据你的解释，我想这就是你想做的

function validateTripID() {
    var tripcode1 = document.getElementById("tripcode1");
    var zipcode1 = document.getElementById("zipcode1");
    var tripcode2 = document.getElementById("tripcode2");
    var zipcode2 = document.getElementById("zipcode2");
    var tripcode3 = document.getElementById("tripcode3");
    var zipcode3 = document.getElementById("zipcode3");
    var tripcode4 = document.getElementById("tripcode4");
    var zipcode4 = document.getElementById("zipcode4");
    var tripcode5 = document.getElementById("tripcode5");
    var zipcode5 = document.getElementById("zipcode5");
    var tripcodes = [tripcode1, tripcode2, tripcode3, tripcode4, tripcode5];
    var zipcodes = [zipcode1, zipcode2, zipcode3, zipcode4, zipcode5];
    var tripIDArray = [
      [tripcodes[0].value, zipcodes[0].value],
      [tripcodes[1].value, zipcodes[1].value],
      [tripcodes[2].value, zipcodes[2].value],
      [tripcodes[3].value, zipcodes[3].value],
      [tripcodes[4].value, zipcodes[4].value]
    ];
    var tripArrayLength = tripIDArray.length;
    for (var i = 0; i < tripArrayLength; i++) {
      for(var j = i+1; j < tripArrayLength; j++){
        if(tripIDArray[i][0] == tripIDArray[j][0]){
            tripcodes[i].className += "error";
            alert("tripcode "+tripIDArray[i][0]+" already entered at highlighted field!");
    }
  }
}

函数validateTripID（）{
var tripcode1=document.getElementById（“tripcode1”）；
var zipcode1=document.getElementById（“zipcode1”）；
var tripcode2=document.getElementById（“tripcode2”）；
var zipcode2=document.getElementById（“zipcode2”）；
var tripcode3=document.getElementById（“tripcode3”）；
var zipcode3=document.getElementById（“zipcode3”）；
var tripcode4=document.getElementById（“tripcode4”）；
var zipcode4=document.getElementById（“zipcode4”）；
var tripcode5=document.getElementById（“tripcode5”）；
var zipcode5=document.getElementById（“zipcode5”）；
变量tripcodes=[tripcode1、tripcode2、tripcode3、tripcode4、tripcode5]；
变量zipcodes=[zipcode1，zipcode2，zipcode3，zipcode4，zipcode5]；
变量Tripidaray=[
[tripcodes[0]。值，zipcodes[0]。值]，
[tripcodes[1]。值，zipcodes[1]。值]，
[tripcodes[2]。值，zipcodes[2]。值]，
[tripcodes[3]。值，zipcodes[3]。值]，
[tripcodes[4]。值，zipcodes[4]。值]
];
var tripArrayLength=tripIDArray.length；
对于（var i=0；i

}

---

工作提琴：

我不清楚您想要什么？如果用户输入相同的旅行id两次，我想提醒他您只想检测重复的旅行码，还是还想查找重复的旅行码？

function validateTripID() {
    var tripcode1 = document.getElementById("tripcode1");
    var zipcode1 = document.getElementById("zipcode1");
    var tripcode2 = document.getElementById("tripcode2");
    var zipcode2 = document.getElementById("zipcode2");
    var tripcode3 = document.getElementById("tripcode3");
    var zipcode3 = document.getElementById("zipcode3");
    var tripcode4 = document.getElementById("tripcode4");
    var zipcode4 = document.getElementById("zipcode4");
    var tripcode5 = document.getElementById("tripcode5");
    var zipcode5 = document.getElementById("zipcode5");
    var tripcodes = [tripcode1, tripcode2, tripcode3, tripcode4, tripcode5];
    var zipcodes = [zipcode1, zipcode2, zipcode3, zipcode4, zipcode5];
    var tripIDArray = [
      [tripcodes[0].value, zipcodes[0].value],
      [tripcodes[1].value, zipcodes[1].value],
      [tripcodes[2].value, zipcodes[2].value],
      [tripcodes[3].value, zipcodes[3].value],
      [tripcodes[4].value, zipcodes[4].value]
    ];
    var tripArrayLength = tripIDArray.length;
    for (var i = 0; i < tripArrayLength; i++) {
      for(var j = i+1; j < tripArrayLength; j++){
        if(tripIDArray[i][0] == tripIDArray[j][0]){
            tripcodes[i].className += "error";
            alert("tripcode "+tripIDArray[i][0]+" already entered at highlighted field!");
    }
  }
}