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<html> <head> <title></title> <script> function
ArrayList(array) { this._arr = typeof(array) = "string"
? array.split(",") : array; } //定义一个$each函数，这个函数接受一个闭包作为参数 ArrayList.prototype.$each = function(closure) { var
ret = []; for(var
i = 0; i < this._arr.length; i++) { ret.push(closure.call(this, this._arr[i])); } return
ret; } ArrayList.prototype.add = function(num) { return
this.$each(function(a) {return
parseFloat(a) + parseFloat(num)}); } ArrayList.prototype.multiply = function(factor) { return
this.$each(function(a) {return
parseFloat(a) * parseFloat(factor)}); } </script> </head> <body> <input id = "list"
type = "text"
value = "1,2,3,4"
/> <input id = "num"
type = "text"
value = "2"
/> <input type = "button"
value = "Add"
onClick = "result.value = (new ArrayList(list.value)).add(num.value)"
/> <input type = "button"
value = "Multiply"
onClick = "result.value = (new ArrayList(list.value)).multiply(num.value)"
/> <br /><input type = "text"
id = "result"
/> </body></html> |
JS异常
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try
{ var
n = prompt("Please enter a positive number"); var
f = factorial(n); alert(n + "! = "
+ f);} catch(ex) { if(ex instanceof
NonePositiveError) { aoert(ex.message); } else
{ throw(ex); }} finally { }function
NonePositiveError(n) { n = n || ""; this.message = "";}NonePositiveError.prototype = new
Error();function
factorial(n) { n = parseInt(n); if(isNaN(n)) { throw(new
TypeError()); } else
if(n <= 0) { throw(new
NonePositiveError(n)); } else
{ return
n <= 1 ? 1 : n * factorial(n - 1); }} |
学习JavaScript王者归来_02,布布扣,bubuko.com
原文：http://www.cnblogs.com/sibeta/p/3728715.html