<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <script type="text/javascript"> var arr = [‘a‘,‘b‘,‘c‘]; var result = arr.join("+"); alert(result); alert(arr.length);//var result = arr.join("+");这是一个拼接字符 //直接在中间拼接的不改变原来的数组长度,只是对字符简单的拼接 var acc = arr.reverse(); alert(acc);//物理反转 </script> </head> <body> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <script type="text/javascript"> var arr = "你好呀"; alert(arr); var temp = encodeURI(arr); alert(temp); alert(decodeURI(temp)); </script> </head> <body> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <script type="text/javascript"> var arr = [1,2,3,"a",true]; var aaa = newArray();//默认长度是0 /* for(int i = 0; i < 4 ;i++) { alert(arr[i]); } */ alert(arr.length); </script> </head> <body> </body> </html>