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引用句柄是一种指向指针的指针。我们知道，所谓指针是一种内存地址。应用程序启动后，组成这个程序的各对象是住留在内存的。如果简单地理解，似乎我们只要获知这个内存的首地址，那么就可以随时用这个地址访问对象。但是，如果您真的这样认为，那么您就大错特错了。我们知道，Windows是一个以虚拟内存为基础的操作系统。在这种系统环境下，Windows内存管理器经常在内存中来回移动对象，依此来满足各种应用程序的内存需要。对象被移动意味着它的地址变化了。如果地址总是如此变化，我们该到哪里去找该对象呢?
为了解决这个问题，Windows操作系统为各应用程序腾出一些内存储地址，用来专门登记各应用对象在内存中的地址变 ...
- 2009-11-26 11:52
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Using $(document).ready() is almost always preferable to using an
onload handler, but we need to keep in mind that because supporting
files may not have loaded, attributes such as image height and width are
not necessarily available at this time. If these are needed, we may at times also choose to im ...
- 2009-11-26 11:36
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Custom Selectors
To the wide variety of CSS and XPath selectors, jQuery adds its own custom selectors.
Most of the custom selectors allow us to pick certain elements out of a line-up, so to
speak. The syntax is the same as the CSS pseudo-class syntax, where the selector starts
with a colon (:). For e ...
- 2009-11-25 16:25
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the $() function removes the need to do a for loop to access a group of elements since whatever we put inside the parentheses will be looped through automatically and stored as a jQuery object. We can put just about anything inside the parentheses of the $() function.
In jQuery, the dollar sign ...
- 2009-11-25 14:36
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1.Acceptance Test Driven Planning
Acceptance Test Driven Planning is one of the three practices of BDD.5 It
is an extension of Acceptance Test Driven Development, which involves
collaborating with stakeholders on acceptance tests before we write any
code.6
The difference between the two is simple. AT ...
- 2009-11-16 14:36
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Early years
Stallman was born to Jewish parents, Daniel Stallman and Alice Lippman,[6] in 1953 in New York City. His first experience with computers was while in high school at the IBM New York Scientific Center. He was hired for the summer to write a numerical analysis program in Fortran. He comple ...
- 2009-11-10 13:08
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日本经典民歌《四季歌》
http://www.tudou.com/programs/view/anj-b1pCUBQ/
中日版歌词及其简介
引用四季のうた 荒木とよひさ 作词.作曲
春を爱する人は 心清き人 すみれの花のような ぼくの友だち
夏を爱する人は 心强き人 岩をくだく波のような ぼくの父亲
秋を爱する人は 心深き人 爱を语るハイネのような ぼくの恋人
冬を爱する人は 心広き人 根雪をとかす大地のような ぼくの母亲
四季歌 荒木丰尚 作词.作曲
喜爱春天的人儿是 心地纯洁的人,象紫罗兰的花儿一样,是我知心的朋友.
喜爱夏天的人儿是 意志坚强的人, ...
- 2009-11-09 20:44
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引用JS中，简单数据只有 undefined, null, boolean, number和string这五种，而复杂数据只有一种，即object. JavaScript中的代码只体现为一种形式，就是function。
引用
JavaScript里的代码也是一种数据，同样可以被任意赋值和修改的，而它 ...
- 2009-11-08 12:34
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引用require 'spec/stubs/cucumber'
The spec/stubs/cucumber ships with RSpec (as of version 1.2.8), and
adds behaviour to the Cucumber World to support using RSpec stubs
in Cucumber scenarios.3
To ensure that each cucumber scenario starts with a clean slate, your scenarios are run upon a blank Object.ne ...
- 2009-11-06 14:09
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Intrinsic Data Type
integer,real complex,logical,character这些都是fortran所内建(built-in)的数据类型
Integer Type
如： 23 0 1341324 42＿short 42_long,其中 "short", "long" 指示着(designate)该整数的 参数类型（ kind parameter)
Real Type
实数常量有 ...
- 2009-11-02 20:36
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Fortran originally was designed to allow programmers to evaluate formu-
las—FORmula TRANslation—easily on large computers.
program calculation_1_v2
print *, "84 + 13 =", 84 + 13
end program calculation_1_v2
The program Statement
Each Fortran program begins with a program statement a ...
- 2009-11-02 16:09
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When someone walks in your life
and could make you a better person
and forget about your past,
never let go of them.
informal [in'fɔ:məl
I meant it to be an informal discussion, but it didn't turn out as I intended (it should).
我本想随便商量一下, 结果事与愿违.
Perhaps I’m a bit delirious but I think it wou ...
#!/usr/bin/env ruby
# Define a task library for running RSpec contexts.
require 'rake'
require 'rake/tasklib'
[size=large][/size]
module Spec
module Rake
# A Rake task that runs a set of specs.
#
# Example:
#
# Spec::Rake::SpecTask.new do |t|
# t.warning = true
...
- 2009-09-08 13:02
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he describe( ) method
The describe( ) method takes an arbitrary number of arguments and an
optional block, and returns a subclass of Spec::Example::ExampleGroup.2
We generally only use one or two arguments, which represent the facet
of behaviour that we wish to describe. They might describe an objec ...
- 2009-09-07 16:04
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