replace的用法

var text ="javascript not java";
function f(word){
    return word.substring(0,1).toUpperCase() +word.substring(1);//首字母大写
}

console.log(text.replace(/\b\w+\b/g,f))   //Javascript Not Java

var t="javascript";
//$1,$2, ...,$99 与正则表达式中的第1-99表达式相匹配的文本
//$& 与正则表达式相匹配的字符串
//$`位于匹配子字符串左侧的文本
//$'位于匹配子表达式右侧的文本
var b =t.replace(/(java)(script)/,"$2-$1")   //script-java
var c = t.replace(/.*/g,"$&$&");       //javascriptjavascript
var d = t.replace(/script/,"$& != $`");    //javascript != java
var e = t.replace(/java/,"$&$' is ");          //javascript is script

var s="<h3>#{title}</h3><div>#{content}</div>"
var f= function(){
    var data={title:"liulang",content:"liulang'blog"}
    //for(var i=0; i<arguments.length;i++){
        //document.write("第"+(i+1)+"个参数的值："+arguments[i]);
        //document.write("<br />");
        return data[arguments[2]];
    //};
}
var a= s.replace(/(#\{(.*?)\})/g,f);
alert(a);