javascript 从 jquery 中的字符串中计算特殊字符
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count special characters from string in jquery
提问by Sender
var temp = "/User/Create";
alert(temp.count("/")); //should output '2' find '/'
i will try this way
我会尝试这种方式
// the g in the regular expression says to search the whole string
// rather than just find the first occurrence
// if u found User -> var count = temp.match(/User/g);
// But i find '/' char from string
var count = temp.match(///g);
alert(count.length);
u can try here http://jsfiddle.net/pw7Mb/
你可以在这里试试http://jsfiddle.net/pw7Mb/
回答by Andrew Shepherd
Enter a regular expression using the escape character: (\)
使用转义字符输入正则表达式：(\)
var count1 = temp1.match(/\//g);
回答by Bergi
You would need to escape the slash in regex literals:
您需要转义正则表达式中的斜杠：
var match = temp.match(/\//g);
// or
var match = temp.match(new RegExp("/", 'g'));
However, that could return nullif nothing is found so you need to check for that:
但是，null如果未找到任何内容，则可能会返回，因此您需要检查：
var count = match ? match.length : 0;
A shorter version could use split, which returns the parts between the matches, always as an array:
一个较短的版本可以使用split，它返回匹配之间的部分，总是作为一个数组：
var count = temp.split(/\//).length-1;
// or, without regex:
var count = temp.split("/").length-1;
