Javascript：比较两个多维数组检索值

Question

我正在研究一个计算表格，它生成一个具有两个值 [selection] 的多维数组，类似于：

[[10,0.5], [18,0.75]]

第二个数组 [lookup-table] 包含一系列值：

["10","0.5","0.1"], ["12","0.5","1.1"], ["14","0.5","3.1"], ["16", "0.5","5.1"],["18","0.5","7.1"], ["20","0.5","9.6"], ["22","0.5","11.6"] ... ["18","0.75","9.1"]

我正在尝试将 [selection] 数组中的索引 [0]、[1] 值与 [lookup-table] 数组中的相同索引值进行匹配。

["10","0.5","0.1"]... ["18","0.75","9.1"]

完成后，我想检索 [lookup-table] 中索引 [x][2] 值的值：

["10","0.5","0.1"]... ["18","0.75", "9.1"]

我确实在这里找到了一个非常有用且类似的问题：JavaScript - Compare two multidimensional arrays

并且在控制台中，它似乎可以正确识别数组索引中的匹配项。

我正在使用或多或少类似的功能：

function find(haystack, needles) {
   var lookupValue = [];
    //Iterate through all elements in first array

    for(var x = 0; x < haystack.length; x++){

        //Iterate through all elements in second array    
        for(var y = 0; y < needles.length; y++){

          /*This causes us to compare all elements 
             in first array to each element in second array
            Since haystack[x] stays fixed while needles[y] iterates through second array.
             We compare the first two indexes of each array in conditional
          */

          if(haystack[x][0] == needles[y][0] && haystack[x][1] == needles[y][1]){
            console.log("match found");
            console.log("Array 1 element with index " + x + " matches Array 2 element with index " + y);

            //Retrieve the price for the high and low lookup values and store in array
            lookupValue = haystack[x][2];

          }
      }
    }
    return lookupValue;
  }

  var totalResult = find(lookupTable, flushGrowthArray ).toString();

但是，当我尝试从 [lookup-table] 中的匹配项中检索 haystack[x][2] 索引值时，出于某种原因，我只返回了一个值。

我认为这可能是一个非常简单的错误；我究竟做错了什么？我感谢任何新的见解。

Answer 1

lookupValue = haystack[x][2];

应该是：

lookupValue.push(haystack[x][2]);

所以你将匹配添加到数组中。