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javascript不像python那樣可以方便地多行書寫字串，比如python可以這樣寫字串:
mStr=""" line1 line2 'line3'"""
而javascript只能用 + 與拼裝起來
mStr="line1"+ "line2"+ "'line3'";
由於習慣了python的這種用法，用起來javascript就特不爽。昨晚下班後回到房間打坐冥思，靈機一動，啊哈！原來javascript也可以方便地進行多行書寫。原理是構造一個函數,在函數內
寫注釋,如
fun=function(){ /* line1 line2 line3 */}
然後把這個fun變成字串，只需簡單地和一個Null 字元串相加即可:
funStr=fun+"";
那麼就會得到像下面這樣的字串
"function(){ /* line1 line2 line3 */}"
然後再寫一個函數去提取這個字串注釋裡的內容即可。而且不用處理 ' "的轉義。
完整代碼和樣本請看下面:
<html><head> <meta http-equiv="content-type" content="text/html;charset=gbk"> <script> function $string(fun){ var funStr=fun+""; var reg=/\/\*/img; var r=reg.exec(funStr); var start=null; var stop=null; if(r){ start=reg.lastIndex; reg=/\*\//img; r=reg.exec(funStr); if(r){ stop=reg.lastIndex; return funStr.substring(start,stop-2); } } throw "語法錯誤..." } var myString=$string( function(){ /* <table> <tr> <td>使用者名稱</td><td>密碼</td> </tr> <tr> <td style="widht:20px;">@name</td><td>zf123456</td> </tr> </table> */ } ); alert(myString); </script></head><body></body></html>
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