示例
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>JavaScript forEach</title> <link rel="stylesheet" href=""> </head> <body> <script type="text/javascript"> var a = [‘a‘,‘b‘,‘c‘]; var s = new Set([‘a‘,‘b‘,‘c‘]); var m = new Map([[1,‘x‘],[2,‘y‘],[3,‘z‘]]); a.forEach(function(element,index,array){ console.log(element + " " + index + " " + array); }); s.forEach(function(element,sameElement,set){ console.log(element + " " + sameElement + " " + set); }); m.forEach(function(value,key,map){ console.log(value + " " + key + " " + map); }); </script> </body> </html>
时间: 2024-10-15 18:53:42