在 javascript 中创建和解析 3D 数组？
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creating and parsing a 3D array in javascript?
提问by kiran
can any one help me to create and parse a 3d array in javascript.
任何人都可以帮助我在 javascript 中创建和解析 3d 数组。
im having a questionId each question Id have a selected option and an optional option text.
我有一个 questionId 每个问题 Id 都有一个选定的选项和一个可选的选项文本。
so i need to create a 3d array for questionId,optionId,optionText(string)..
所以我需要为 questionId、optionId、optionText(string) 创建一个 3d 数组。
Thnks in advance
提前谢谢
回答by Tom Gullen
A one dimension array would be:
一维数组将是：
var myArr = new Array();
myArr[0] = "Hi";
myArr[1] = "there";
myArr[2] = "dude";
alert(myArr[1]); // Alerts 'there'
A two dimensional array would be:
二维数组将是：
var myArr = new Array();
myArr[0] = new Array("Val", "Va");
myArr[1] = new Array("Val", "yo");
myArr[2] = new Array("Val", "Val");
alert(myArr[1][1]); // Alerts 'yo'
A 3D array is more complicated, and you should evaluate your proposed use of it as it has a limited scope within the web. 99% of problems can be solved with 1D or 2D arrays. But a 3D array would be:
3D 数组更复杂，您应该评估您对它的建议使用，因为它在网络中的范围有限。99% 的问题都可以用一维或二维数组解决。但是 3D 数组将是：
var myArr = new Array();
myArr[0] = new Array();
myArr[0][0] = new Array()
myArr[0][0][0] = "Howdy";
myArr[0][0][1] = "pardner";
alert(myArr[0][0][1]); // Alerts 'pardner'
回答by Joe Green
var data = new Array();
data starts off as a regular one-dimensional array. A two dimensional array is really just an array of arrays. So you could do something like
数据从一个常规的一维数组开始。二维数组实际上只是数组的数组。所以你可以做类似的事情
for (var i = 0; i<numberOfQuestions; i++){
data[i] = new Array();
data[i][0] = something;
data[i][1] = somethingElse;
}
Alternatively you could use the following approach
或者，您可以使用以下方法
for (var i = 0; i<numberOfQuestions; i++){
data.push([something, somethingElse]);
}
In any case, at some point you are going to need a loop to populate your initial array with sub-arrays to get the 2d effect.
在任何情况下，在某些时候，您将需要一个循环来使用子数组填充初始数组以获得 2d 效果。
回答by usoban
Okay, so as I said in comment to the question, I think you actually need 2D array. That is, if you have N number of questionIds and each questionId has two properties: optionId and optionText
好的，正如我在对该问题的评论中所说的那样，我认为您实际上需要二维数组。也就是说，如果你有 N 个 questionIds 并且每个 questionId 有两个属性：optionId 和 optionText
You can create it somehow like this:
你可以像这样创建它：
var twoD = new Array();
twoD[1] = new Array();
twoD[1]['optionId'] = 3;
twoD[1]['optionText'] = 'blabla';
twoD[2] = new Array();
twoD[2]['optionId'] = 5;
twoD[2]['optionText'] = null;
alert(twoD[1]['optionId']);
Although note that array with associative key is actually an object in JavaScript.
尽管请注意带有关联键的数组实际上是 JavaScript 中的一个对象。
Update: looping through JavaScript
更新：通过 JavaScript 循环
for(var question : twoD){
alert(question['optionId']);
alert(question['optionText']);
}
回答by Ankur
hi you can create the nth dimension error in javascript one of the example is below
嗨，您可以在 javascript 中创建第 n 维错误示例之一如下
var apple = new Array(); apple[1] = new Array(); apple[1][1] = new Array(); apple[1][1][1] = 'yourname'
var apple = new Array(); 苹果[1] = 新数组(); 苹果[1][1] = new Array(); 苹果[1][1][1] = '你的名字'
now you can use the recursive function to iterate through the array and check and pare every thing.
现在您可以使用递归函数遍历数组并检查和删除所有内容。
