如何将超链接插入到 Javascript 随机化文本数组中？

Question

代码如下：

<SCRIPT LANGUAGE="Javascript"><!--

function text() {
};

text = new text();
number = 0;

// textArray        
text[number++] = "I read the other day some verses written by an eminent painter which were original and not conventional."         
text[number++] = "The soul always hears an admonition in such lines, let the subject be what it may."        
text[number++] = "The sentiment they instil is of more value than any thought they may contain."        
text[number++] = "To believe your own thought, to believe that what is in your private heart is true for all men, that is genius." 

increment = Math.floor(Math.random() * number);

document.write(text[increment]);

//--></SCRIPT>

具体是我想要的话：

对你来说是真的

从数组中的第四个文本链接到一些外部网站。

<a> 标签似乎对我不起作用。字符串方法也没有。当然，我是个十足的笨蛋。

Answer 1

我猜你的问题是你在使用 a 标签时插入的引号，你应该使用正确的引号，如下所示：

text[number++] = "I read the other day some verses written by an eminent painter which were original and not conventional"         
text[number++] = "The soul always hears an admonition in such lines, let the subject be what it may."        
text[number++] = "The sentiment they instil is of more value than any thought they may contain."
text[number++] = "To believe your own thought, to believe that what is in your private heart is <a href='javascript:void(0);'>true for </a> all men, that is genius." 

http://jsbin.com/luyod/2/

Answer 2

让我们一步一步来，

1. 创建一个名为text 的新variable，并让它成为一个数组。

   var text = [];
   

   这里的[] 是一个数组字面量。

2. 用您的字符串

   填充数组 text

   text.push("I read the other day some verses written by an eminent painter which were original and not conventional.");
   text.push("The soul always hears an admonition in such lines, let the subject be what it may.");
   text.push("The sentiment they instil is of more value than any thought they may contain.");
   text.push("To believe your own thought, to believe that what is in your private heart is true for all men, that is genius.";
   

   这里，someArray.push 是一种将新的 item 添加到 Array someArray 的方法。每个新项目都有自己的索引，索引从 0 开始。

3. 从数组中选择一个随机索引text并将其分配给一个新的variable，i

   var i = Math.floor(Math.random() * text.length);
   

   在 JavaScript 中，方法 Math.random 返回一个值严格小于 1 但大于或等于 0 .这意味着我们可以将值乘以 Array 的项目数（或 length），然后向下取整（或 floor）从 Array 中选择随机索引的数字。

4. 在 index i 的 text 的 String 中，将任何出现的 "true for you" 替换为您的链接。让我们将其命名为 variable 名称 str，以便我们可以参考它。

   var str = text[i].replace(/true for you/g, "<a href=\"http://stackoverflow.com\">true for you</a>");
   

   这里，/true for you/g 是 regular expression 或 RegExp。末尾的g 代表global，意思是“一直这样做，直到你到达终点”。

5. 以您喜欢的方式将这个新的字符串（我们称之为str）写入您的#document。由于我们看不到与您的 HTML 标记相关的任何内容，我会保留您的 document.write，但这被认为是 bad practice，因此您将来可能想了解替代方案.

   document.write(str);