从a-z中随机选择一个字母
从a-z中随机选择一个字母
提问于 2015-04-08 03:30:04
如何从a中随机选择一个字母，并将其单独放入html中的一个标题中，并将其替换以前的任何其他字母？我不知道我所做的是否有效。
function randLetter( ) {
var letters =
("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q"
,"r","s","t","u","v","w","x","y","z");
var letter = letters[Math.floor(Math.random()*letters.length)];
return letter
}
$('#letter').html('letter')回答 3
Stack Overflow用户
发布于 2017-11-23 03:44:58
对于大写字母，您可以使用
String.fromCharCode(65+Math.floor(Math.random() * 26))用于小写字母
String.fromCharCode(97+Math.floor(Math.random() * 26))Stack Overflow用户
发布于 2015-04-08 03:33:27
把这段代码用于你的工作
function randLetter() {
var letters = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];
var letter = letters[Math.floor(Math.random() * letters.length)];
return letter
}
$('#letter').html(randLetter())小提琴
Stack Overflow用户
发布于 2015-04-08 03:41:55
如果要替换元素中需要更多代码的随机字母，请执行以下操作。这将替换一个随机字符为随机字母。
function randLetter() {
var letters = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];
var letter = letters[Math.floor(Math.random() * letters.length)];
return letter;
}
var html = $('#letter').html();
var index = Math.floor(Math.random() * html.length);
var char = randLetter();
$('#letter').html(html.substr(0, index) + char + html.substr(index + char.length));<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span id="letter">ABCDEFGHIJKLMNOPQRSTUVWXYZ</span>
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/29505419
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