用JS生成单词的随机列表 [英] Generate random list of words with JS
问题描述
我正在尝试构建一个随机JS单词列表生成器，但是我在这里的代码仅生成一个单词.实际上，我希望它从先前给定的列表中生成30个单词的列表，它可能是60个单词的列表或700个单词，但结果应始终为30个，没有重复的单词，但是我不知道该如何实现.
I'm trying to build a random JS word list generator but the code I have here just generates a single word. Actually I want it to generate a list of 30 words from a previously given list, it may be a 60 word list or 700 but the result should always be 30 with no duplicated words, but I don't know how to achieve this.
此外，我希望访问者介绍自己的单词列表，然后单击生成新单词列表"，然后页面将随机化，并在每次单击时为他们提供30个单词的顺序不同的列表按钮.
Also, I would like the visitors to introduce their own list of words and then click on "generate a new list of words" and then the page will randomize and give them a list of 30 words with different order every time they click the button.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="language" content="english">
<meta http-equiv="Content-Style-Type" content="text/css">
<meta http-equiv="Content-Script-Type" content="text/javascript">
<title></title>
<style type="text/css">
form {
float:left;
padding:20px 20px 10px;
border:1px solid #999;
}
label {
float:left;
width:100px;
line-height:22px;
margin-bottom:10px;
font-size:12px;
}
input {
margin-bottom:10px;
}
</style>
<script type="text/javascript">
function init(){
words0=['art','car','bus','earth','camera','phone','sun','light','number',];
df=document.forms[0];
df.reset();
df[1].onclick=function() {
rnd0=Math.floor(Math.random()*words0.length);
df[0].value=words0[rnd0];
}
}
window.addEventListener?
window.addEventListener('load',init,false):
window.attachEvent('onload',init);
</script>
</head>
<body>
<form action="#">
<div>
<label>word one:</label><input type="text" readonly="readonly"><br>
<input type="button" value="Click here to get random words">
<input type="reset" value="Clear">
</div>
</form>
</body>
</html>
推荐答案
如果要从数组中随机获取N个项目，经典的做法是:
If you want to grab N items randomly from an array, a classical way of doing it is to :
- 随机随机排列您的数组，
- 拿起被折叠阵列的N个头项
示例代码:
function samples(items, number){
items.sort(function() {return 0.5 - Math.random()});
return items.slice(0, number);
}
请注意，如@Phylogenesis所述，它只是作为示例提供了随机播放算法.
Notice that the shuffle algorithm is probably not the best one, it is provided as an example, as mentioned by @Phylogenesis.
如果您希望避免重新发明轮子，也可以使用例如undercore.js，它提供了 sample方法
If you prefer to avoid reinvent wheels, you can also use undercore.js for example, that provides a sample method
这篇关于用JS生成单词的随机列表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
