面试中会遇到的正则题

var f = function(s) {
    return s.replace(/-\w/g, function(x) {
        return x.slice(1).toUpperCase();
    })
}
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function containsNumber(str) {
    var regx = /\d/;
    return regx.text(str);
}
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function isPhone(tel) {
    var regx = /^1[34578]\d{9}$/;
    return regx.test(tel);
}
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function matchesPattern(str) {
    return /^(\d{3}-){2}\d{4}&/.test(str);
}
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function isUSD(str) {
    var regx = /^\$\d{1,3}(,\d{3})*(\.\d{2})?$/;
    return regx.test(str);
}
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function format(number) {
    var regx = /\d{1,3}(?=(\d{3})+$)/g;
    return (number + '').replace(regx, '$&,')  // $&表示与regx相匹配的字符串
}
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function getUrlParam(url, key) {
    var arr = {};
    url.replace(/\??(\w+)=(\w+)&?/g, function(match, matchKey, matchValue) {
       if (!arr[matchKey]) {
           arr[matchKey] = matchValue;
       } else {
           var temp = arr[matchKey];
           arr[matchKey] = [].concat(temp, matchValue);
       }
    });
    if (!key) {
        return arr;
    } else {
        for (ele in arr) {
            if (ele = key) {
                return arr[ele];
            }
        }
        return '';
    }
}
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function isEmail(email) {
    var regx = /^([a-zA-Z0-9_\-])+@([a-zA-Z0-9_\-])+(\.[a-zA-Z0-9_\-])+$/;
    return regx.test(email);
}
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function isCardNo(number) {
    var regx = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/;
    return regx.test(number);
}
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var regx = /^[\u4e00-\u9fa5]{0,}$/;
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var str = '/asdf//';
str = str.replace(/^\/*|\/*$/g, '');
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var regx = /^\d{4}\-\d{1,2}\-\d{1,2}$/
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 var regx = /^(?:(?!0000)[0-9]{4}-(?:(?:0[1-9]|1[0-2])-(?:0[1-9]|1[0-9]|2[0-8])|(?:0[13-9]|1[0-2])-(?:29|30)|(?:0[13578]|1[02])-31)|(?:[0-9]{2}(?:0[48]|[2468][048]|[13579][26])|(?:0[48]|[2468][048]|[13579][26])00)-02-29)$/;
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var regx = /^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/;
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var regx = /^#?([a-fA-F0-9]{6}|[a-fA-F0-9]{3})$/;
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var regx = /^[京津沪渝冀豫云辽黑湘皖鲁新苏浙赣鄂桂甘晋蒙陕吉闽贵粤青藏川宁琼使领A-Z]{1}[A-Z]{1}[A-Z0-9]{4}[A-Z0-9挂学警港澳]{1}$/;
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var str="<p>dasdsa</p>nice <br> test</br>"
var regx = /<[^<>]+>/g;
str = str.replace(regx, '');
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var regx = /^.*(?=.{6,})(?=.*\d)(?=.*[A-Z])(?=.*[a-z])(?=.*[!@#$%^&*? ]).*$/;
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var regx = /^((https?|ftp|file):\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/;
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var regx = /^-?([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0)$/
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var str = '<OPTION value="待处理">待处理</OPTION>';
var regx = /^<.*?>/;
var resiult = regx.exec(str)[0];
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