这道题应该如何做？

Question

用javascript来解决！！！求解！

Answer 1

function test(str){    return str.replace(/\b[\w\']+\b/g,function(match){        return match.toLowerCase().replace(/^./,function(match){            return match.toUpperCase();        });    });}[    "I'm a little tea pot",    "sHoRt AnD sToUt",    "HERE IS MY HANDLE HERE IS MY SPOUT"].forEach(function(str){    console.log(test(str))})