Question

我必须访问看起来像逗号分隔的数组列表的元素？

[
    ["service_state", "service_description", "service_icons", "svc_plugin_output", "svc_state_age", "svc_check_age", "perfometer"],
    ["OK", "Check_MK", "", "OK- Agent version 1.2.4p4, execution time 0.1 sec", "2017-05-01 21:11:33", "13 sec", "0.1s"]
]

实际字符串包含两个以上的数组，我不知道如何使用javascript访问每个元素。

非常感谢任何帮助。

Answer 1

要访问多维数组，只需执行

array[0][0]表示第一个子数组的第一个元素

在3个级别上它将是相同的

array = [ [ [ 1, 2, 3 ], [ 4, 5, 6 ] ], 7 ];

array[0][1][1]将提供5

Answer 2

请参阅：https://jsfiddle.net/w2amcpbq/或以下代码段：

＆＃13;

var multiArr = [
  [
    "service_state",
    "service_description",
    "service_icons",
    "svc_plugin_output",
    "svc_state_age",
    "svc_check_age",
    "perfometer"
  ],
  [
    "OK",
    "Check_MK",
    "",
    "OK - Agent version 1.2.4p4, execution time 0.1 sec",
    "2017-05-01 21:11:33",
    "13 sec",
    "0.1s"
  ]
];

var i = 0,
  arrLength = multiArr.length;
for (i; i < arrLength; i++) {
  var nestedArr = multiArr[i];
  console.log(nestedArr);
  for (var j = 0; j < nestedArr.length; j++) {
    console.log(nestedArr[j]);
  }
}

＆＃13;

Answer 3

假设您要遍历所有元素，并且最初您有一个字符串。

＆＃13;

var text = '[["service_state","service_description","service_icons","svc_plugin_output","svc_state_age","svc_check_age","perfometer"],["OK","Check_MK","","OK - Agent version 1.2.4p4, execution time 0.1 sec","2017-05-01 21:11:33","13 sec","0.1s"]]';
var array = JSON.parse(text);

array.forEach(function(nested) {
  nested.forEach(function(el) {
    console.log(el);
  });
});

＆＃13;

Answer 4

这应该可以解决问题：

for each (arr in multiArr) {
    for each (v in arr) {
       print(v)
    }
}

Answer 5

这是一个多维数组。将其视为一组行和列。您可以访问以下单个元素：array [row] [column]。

例如：

var arr = [[0,1,2],[3,4,5]];
arr[0][0] //this results in 0
arr[0][1] //this results in 1
arr[1][0] //this results in 3

遵循此逻辑，您可以使用嵌套for循环（循环内循环）循环遍历数组。

for(var i = 0; i < arr.length; i++) { // outer loop for rows
  for(var j = 0; j < arr.length; j++) { // inner loop for columns
    console.log(arr[i][j])
  }
}

在Javascript中访问数组的集合

5 个答案: