Prototype - compact() 方法
此方法返回数组的新版本,不包含任何空值/未定义值。
语法
array.compact();
返回值
返回一个新数组,不包含任何空值或未定义值。
示例
<html> <head> <title>Prototype examples</title> <script type = "text/javascript" src = "/javascript/prototype.js"></script> <script> function showResult() { var oldArr =['Sam','Justin','Andrew','Dan', null, undefined]; alert("Guys in old Arr" ); oldArr.each(function(item) { alert(item ); }); var newArr = oldArr.compact(); alert("Guys in new Arr" ); newArr.each(function(item) { alert(item ); }); } </script> </head> <body> <p>单击按钮查看结果。</p> <br /> <br /> <input type = "button" value = "Result" onclick = "showResult();"/> </body> </html>
输出
prototype_array_processing.html