js 正则 测试

Posted 2020-11-19 enych

        var str0 = ‘2013-6-7()‘;
        var AAAAADD = str0.match(/(d)/g); //11个空字符串  //["2", "0", "1", "3", "6", "7"]
        var AAAAAD = str0.match(/d/g); //11个空字符串      // ["2", "0", "1", "3", "6", "7"]
        var AAAAAD1 = str0.match(/d+/g);                   //["2013", "6", "7"]
        var AAAAAD2 = str0.match(/(d+)/g);                 //["2013", "6", "7"]
        var AAAAAD3 = str0.match(/d+-/g);              //["2013-", "6-"]
        var AAAAAD4 = str0.match(/d+(-)/g);              //["2013-", "6-"]
        var AAAAAD5 = str0.match(/(d+)(-)/g);              //["2013-", "6-"]

        ///   (d+)(-)/g = /d+(-)/g = /d+-/g        ||  /d+/g = /(d+)/g  || /d/g = /(d)/g

 

        var data = ‘windows 98 is ok‘;
        console.log(data);
        console.log(data.match(/windows (?=d+)/));  // ["windows "]   //(?=)会作为匹配校验，但不会出现在匹配结果字符串里面
        console.log(data.match(/windows (?:d+)/));  // ["windows 98"]   //(?:)会作为匹配校验，并出现在匹配结果字符里面
        console.log(data.match(/windows (d+)/));    // ["windows 98", "98"] //先匹配windows 98,在匹配98
        var str = "dskf(AAA)_8hjk(CCC)dsk(BBB)";
        var reg = /(?:()w+(?:))/;
        var reg = /(?:()(?:))/;
        console.log(str.match(/(?:()/));//(
        console.log(str.match(/w+/)); //dskf
        console.log(str.match(/(?:))/));//)
        console.log("10000");
        console.log(str.match(/(?:()(?:))/)); //匹配(),
        console.log(str.match(/(?:()w+(?:))/)); //["(AAA)"]
        console.log(str.match(/(?:()(w+)(?:))/)); //["(AAA)".AAA]

 

  data = "blang001";
        console.log(data);
        console.log(data.match(/blang/i)); //["blang"]
        console.log(data.match(/D/ig)); //["b"]  吧不是数字的提取出来  ["b", "l", "a", "n", "g"]
        console.log(data.match(/lang/i)); // lang 代表非blang 字符串, 
        console.log(data.match(/lang(?:0)/));

        var lang = /lang(?:uage)?-([w-]+)/i;