Question

我有这些数据：

var data = [
  [1, "San Miguel National Central High School", "School", 1],
  [1, "San Miguel Central Elementary School", "School", 2],
  [2, "Medrano's Rice Mill and Warehouse", "Warehouse", 3],
  [1, "Unknown", "Residential", 341],
  [2, "Unknown", "Residential", 532],
  [3, "Unknown", "Residential", 257],
  [2, "Unknown", "Gas Station", 1]
];

预期的输出应该是这样的：

var data = [
  ["School", 3,0,0],
  ["Warehouse", 0,3,0],
  ["Residential", 341, 532, 257],
  ["Gas Station", 0,1,0]
];

为了表示，

data [i] [0] - ＆gt;等级
data [i] [1] - ＆gt;建筑名称
data [i] [2] - ＆gt;建筑类型
data [i] [3] - ＆gt;计数

结果应该有这个序列：

建筑类型，1级计数，2级计数，3级计数

如果数组具有相同的级别和相同的建筑类型，则应添加计数值。

如何使用JavaScript或JQuery实现这一目标？

Answer 1

var input = [
  [1, "San Miguel National Central High School", "School", 1],
  [1, "San Miguel Central Elementary School", "School", 2],
  [2, "Medrano's Rice Mill and Warehouse", "Warehouse", 3],
  [1, "Unknown", "Residential", 341],
  [2, "Unknown", "Residential", 532],
  [3, "Unknown", "Residential", 257],
  [2, "Unknown", "Gas Station", 1]
];
    
var output = [];
    
function init() {
    var index = {};
    for (let building of input) {
        if (!index.hasOwnProperty(building[2])) {
            index[building[2]] = output.length;
            output.push([ building[2], 0, 0, 0 ]);
        }
        output[index[building[2]]][building[0]] += building[3];
    }
    console.log(output);
}
document.addEventListener( "DOMContentLoaded", init, false );

基于其他多个值在Array中添加值，然后重新组合

1 个答案: