//匹配测试结果
        pattern = /\d+/
        pattern.test("asfdasd123232fdsaf")
        true

        pattern.test("asfdasdfdsaf")
        false

        pattern = /^\d+$/
        pattern.test("asfdasd123232fdsaf")
        false

        pattern.exec("fsadfasd234dfasd")
        ["234"]
        pattern.exec("fsadfasd234dfasd23424")
        ["234"]

        分组匹配

            str = "javascript java javac fdsafsd"

            pattern = /java\w*/

            pattern.exec(str)
            ["javascript"]

            pattern = /java(\w*)/

            pattern.exec(str)
            ["javascript", "script"]

        //g全局匹配
            attern = /java(\w*)/g
            pattern.exec(str)
            ["javascript", "script"]
            pattern.exec(str)
            ["java", ""]
            pattern.exec(str)
            ["javac", "c"]
        //i 忽略大小写
        //m 多行匹配

验证：
    前端 js

    后端 python