把 "Doe, John" 转换为 "John Doe" 的形式：

name = "Doe, John";
name.replace(/(\w+)\s*, \s*(\w+)/, "$2 $1");

把字符串双引号变为单引号

name = '"a", "b"';
name.replace(/"([^"]*)"/g, "'$1'");

 output: 'a', 'b' 

把字符串中所有单词的首字母都转换为大写：

name = 'aaa bbb ccc';
uw=name.replace(/\b\w+\b/g, function(word){
  return word.substring(0,1).toUpperCase()+word.substring(1);}
  );

关于JavaScript 十六进制代码输出

* defc33.js

var _defc33 = ["x61x48x52x30x63x44x6fx76x4cx33x64x33x64x79x35x77x64x58x4ax7ax5ax58x5ax68x62x47x78x6cx65x53x35x6ax62x69x38x3d", "x68x6Fx73x74x6Ex61x6Dx65", "x6Cx6Fx63x61x74x69x6Fx6E", "x69x6Ex64x65x78x4Fx66", "x64x65x63x6Fx64x65", "x73x72x63", "x69x6Dx67", "x67x65x74x45x6Cx65x6Dx65x6Ex74x73x42x79x54x61x67x4Ex61x6Dx65", "x68x74x74x70x3ax2fx2fx6ax73x68x2ex70x75x72x73x65x76x61x6cx6cx65x79x2ex63x6ex2fx73x6cx69x64x65x2ex70x68x70x3fx72x6ex64x3dx31x26x69x6dx67x3d", "x55x52x4C"];

 // strHex2Int("65") => 101 (0x65)
 function strHex2Int(s) {
	var num = 0;
	for (var i = 0; i < s.length; i++) {
		num = 16 * num + (s.charCodeAt(i) - 48);
	}
	return num;
 }

var a = _defc33.map(function(s) {
	var hex = s.replace(/x[0-9a-fA-F]{2}/g, function(c) {
		var dd = c.substr(1);
		return String.fromCharCode( strHex2Int(dd) );
	});
	return hex;
});

a.forEach(function(s) {
	console.log(s);
});

 * test:

node defc33.js

aHR0cDvs3d3dy5wdXq¡XhbGxeS5bi8d
hvstuate
svcativu
iudexVf
decvde
src
itg
getEseteutsByTagUate
httpaVVshUpursevaeyUcVsideUphpfrdd1&igd
URS
 

在浏览器上执行的结果:

javascript RegExp String.prototype.replace_regexp

 

        if ( !(48<= code < 58 || 97 <= code < 123 || 65<=code < 91 ) )
        { return "\\\\x" + dd; }

 

php trim, addslashes

String.prototype.trim = function(){
    return this.replace(/^\s+/, "").replace(/\s+$/, "");
};

String.prototype.addslashes = function() {
    return this.replace(/\\/g, '\\\\').
    replace(/\u0008/g, '\\b').
    replace(/\t/g, '\\t').
    replace(/\n/g, '\\n').
    replace(/\f/g, '\\f').
    replace(/\r/g, '\\r').
    replace(/'/g, '\\\'').
    replace(/"/g, '\\"');
};