谁能帮我回答下这十个问题，关于java web，高手请进~~~~~~~~~
1.Whataredifferencebetweenasetofwebpagesandawebapplications?Whattechnologiesarecurren...
1. What are difference between a set of web pages and a web applications ? What technologies are currently available for the creation of such applications ?
2. How does Javascript compare with other technologies that are available for use on client browsers?
3. Outline the structure of a Javascript program
4. Can JavaScript be executed without using a web browser.
5. What is the difference between a variable and a value ? How should variables be named ?
6. What data types does JavaScript use ?
7. What are scoping rules – why are they so important in all programming languages ?
8. Why do some functions return values to the calling statement ?
9. How does JavaScript create HTML pages on the fly ?
10. Write a simple JavaScript that adds some numbers together, concatenating a couple of strings and then shows the result in an alert() dialog and on the page.
on the fly 是联机的意思，第九题和第三题怎么写？ 展开
2. How does Javascript compare with other technologies that are available for use on client browsers?
3. Outline the structure of a Javascript program
4. Can JavaScript be executed without using a web browser.
5. What is the difference between a variable and a value ? How should variables be named ?
6. What data types does JavaScript use ?
7. What are scoping rules – why are they so important in all programming languages ?
8. Why do some functions return values to the calling statement ?
9. How does JavaScript create HTML pages on the fly ?
10. Write a simple JavaScript that adds some numbers together, concatenating a couple of strings and then shows the result in an alert() dialog and on the page.
on the fly 是联机的意思，第九题和第三题怎么写？ 展开
3个回答
展开全部
1. What are difference between a set of web pages and a web applications ? What technologies are currently available for the creation of such applications ?
网页与网页应用程序在于,网页只是单一的静态页面.而网页应用程序是一些服务的集合.
当前流行的创建Web应用程序的技术有. 前端:Html+CSS+javascript. XML
后台:PHP,JSP,ASP,Perl,Python,Ruby.
2. How does Javascript compare with other technologies that are available for use on client browsers?
JavaScript主要用来操作浏览器DOM给网页提供动态与交互.
3. Outline the structure of a Javascript program
4. Can JavaScript be executed without using a web browser.
可以, 现在也有很多的JavaScript解释器Shell.
5. What is the difference between a variable and a value ? How should variables be named ?
变量可以存储值,值是字面量.变量可以改变.可以被赋值.可以通过关键字var声明变量.
6. What data types does JavaScript use ?
JavaScript的简单类型包括数字,字符串,布尔值(true和false),null值和undefined值.其他所有的值都是对象.数字,字符串和布尔值”貌似”对象,因为它们拥有方法,但是它们是不可变的.JavaScript中的对象是可变的键控集合(Keyed collections).在Javascript中,数组是对象,函数是对象,正则表达式,当然,对象自然也是对象.
7. What are scoping rules – why are they so important in all programming languages ?
在编程语言中,作用域控制着变量与参数的可见性及生命周期.对程序员来说这是一个重要的帮助
因为他减少了名称冲突,并且提供了自动内存管理.
8. Why do some functions return values to the calling statement ?
因为调用函数的作用有些是为了求值!
9. How does JavaScript create HTML pages on the fly ?
什么是Fly?
10. Write a simple JavaScript that adds some numbers together, concatenating a couple of strings and then shows the result in an alert() dialog and on the page.
<html><body>
<script>
var a = 10;
var b = 20;
function add(var a,var b){
var result = a+b;
return result;
}
var sum=add(a,b);
alert(""+a+" + "+b+"="+sum);
</script>
</body></html>
/* 还有补充吗?*/
网页与网页应用程序在于,网页只是单一的静态页面.而网页应用程序是一些服务的集合.
当前流行的创建Web应用程序的技术有. 前端:Html+CSS+javascript. XML
后台:PHP,JSP,ASP,Perl,Python,Ruby.
2. How does Javascript compare with other technologies that are available for use on client browsers?
JavaScript主要用来操作浏览器DOM给网页提供动态与交互.
3. Outline the structure of a Javascript program
4. Can JavaScript be executed without using a web browser.
可以, 现在也有很多的JavaScript解释器Shell.
5. What is the difference between a variable and a value ? How should variables be named ?
变量可以存储值,值是字面量.变量可以改变.可以被赋值.可以通过关键字var声明变量.
6. What data types does JavaScript use ?
JavaScript的简单类型包括数字,字符串,布尔值(true和false),null值和undefined值.其他所有的值都是对象.数字,字符串和布尔值”貌似”对象,因为它们拥有方法,但是它们是不可变的.JavaScript中的对象是可变的键控集合(Keyed collections).在Javascript中,数组是对象,函数是对象,正则表达式,当然,对象自然也是对象.
7. What are scoping rules – why are they so important in all programming languages ?
在编程语言中,作用域控制着变量与参数的可见性及生命周期.对程序员来说这是一个重要的帮助
因为他减少了名称冲突,并且提供了自动内存管理.
8. Why do some functions return values to the calling statement ?
因为调用函数的作用有些是为了求值!
9. How does JavaScript create HTML pages on the fly ?
什么是Fly?
10. Write a simple JavaScript that adds some numbers together, concatenating a couple of strings and then shows the result in an alert() dialog and on the page.
<html><body>
<script>
var a = 10;
var b = 20;
function add(var a,var b){
var result = a+b;
return result;
}
var sum=add(a,b);
alert(""+a+" + "+b+"="+sum);
</script>
</body></html>
/* 还有补充吗?*/
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