目的是写一个 JavaScript 函数，主要利用正则表达式，实现英文 APP 名的代码化。
何谓代码化？
即转化符合^[A-Za-z][A-Za-z\d'\+\-_ ]*$，举例以明之：| APP英文名 | 代码化 | 注 |
| :--- | :--- | |
| Alipay |alipay| |
| MX Player |mx_player| |
| CoolApk |cool_apk| |
| BlueDict Pro |blue_dict_pro| |
| Camera360 |camera_360| |
| ViPER4Android FX |vi_per_4_android_fx| |
| Today's Headline |todays_headline| |
| Moon+ Reader |moon_plus_reader| |
| X-plore |x_plore| |
| Minecraft - Pocket Edition |minecraft_pocket_edition| |
| JD.COM |jd_com| |
| QQMusic |qqmusic| 这种情况需要人工处理为qq_music，类似还有 QQi |
| 58Life || 不能以非字母开头 |
function codeAppName(name) {
if (!name) {
return "";
}
name = name.trim();
if (name.length == 0) {
return "";
}
if (/^[A-Za-z][A-Za-z\d'\+\-\. _]*$/.test(name)) {
var res;
while ((res = /([a-z][A-Z])|([A-Za-z]\d)|(\d[A-Za-z])/.exec(name)) != null) {
name = name.replace(res[0], res[0].charAt(0) + "_" + res[0].charAt(1));
}
return name.toLowerCase()
.replace(/'/g, "")
.replace(/\+/g, "_plus")
.replace(/-|\.| /g, "_")
.replace(/_{2,}/g, '_');
}
return "";
}
挑选具有代表性的英文 APP 名进行测试：
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Test</title>
</head>
<body>
<script type="text/javascript">
var apps = [
["Alipay", "alipay"],
["MX Player", "mx_player"],
["CoolApk", "cool_apk"],
["BlueDict Pro", "blue_dict_pro"],
["Camera360", "camera_360"],
["ViPER4Android FX", "vi_per_4_android_fx"],
["Today's Headline", "todays_headline"],
["Moon+ Reader", "moon_plus_reader"],
["X-plore", "x_plore"],
["Minecraft - Pocket Edition", "minecraft_pocket_edition"],
["JD.COM", "jd_com"],
["58Life", ""]
];
for (var i in apps) {
var code = codeAppName(apps[i][0]);
var pass = code == apps[i][1];
document.write(pass + ": " + apps[i][0] + " >>> " + code);
if (!pass) {
document.write(" >>> " + apps[i][1]);
}
document.write("<br />");
}
</script>
</body>
</html>
测试全部通过：
true: Alipay >>> alipay
true: MX Player >>> mx_player
true: CoolApk >>> cool_apk
true: BlueDict Pro >>> blue_dict_pro
true: Camera360 >>> camera_360
true: ViPER4Android FX >>> vi_per_4_android_fx
true: Today's Headline >>> todays_headline
true: Moon+ Reader >>> moon_plus_reader
true: X-plore >>> x_plore
true: Minecraft - Pocket Edition >>> minecraft_pocket_edition
true: JD.COM >>> jd_com
true: 58Life >>>
