我的搜索“功能"不起作用 [英] My search "function" does not work

问题描述

 var cat = prompt("What Do You Want To Tweet??!");

 if(cat.length >= 140)
{
confirm("Sorry but your Tweet was over the 140 character limit by: " + (cat.length - 140));
confirm("You need to resubmit a Tweet that is not over the 140 Character limit");
}
else{
confirm("Success, Your Tweet has been posted!");
}
//scan for websites

if (cat.search(" www ", " http ", ".com"))
{

}
else{
confirm("We have Detected a URL in your Tweet");   
}

<小时>

我的代码一直有效，直到我尝试发推"一个网站.如果我输入 www 或 .com 作为推文，它会告诉我它检测到一个好的 url.但是当我输入 xxxxxx www xxxxxx(x 是其他任何东西)时，它不会检测到 url.

---

My code works up until I try to "tweet" a website. if I type www or .com as a tweet, it will tell me it has detected a url which is good. BUT when I type xxxxxx www xxxxxx (x being anythingelse) it wont detect the url.

推荐答案

可以尝试使用正则表达式

You can try using regular expressions

var cat = prompt("What Do You Want To Tweet??!"),
    expression = /[-a-zA-Z0-9@:%_\+.~#?&//=]{2,256}\.[a-z]{2,4}\b(\/[-a-zA-Z0-9@:%_\+.~#?&//=]*)?/gi,
    regex = new RegExp(expression);
if(cat.length >= 140) {
    confirm("Sorry but your Tweet was over the 140 character limit by: " + (cat.length - 140));
    confirm("You need to resubmit a Tweet that is not over the 140 Character limit");
}
else{
    confirm("Success, Your Tweet has been posted!");
}
//scan for websites

if (cat.match(regex)) {
    confirm("We have dectected a URL in your Tweet");
}
else{
   confirm("no URL");   
}

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