O''''''''Reilly Network For Information About''''''''s Book part 1 ppt
O''''Reilly Network For Information About''''s Book part 1 ppt
... technical questions about this book, send email to:
bookquestions@oreilly.com
For information about books, conferences, Resource Centers, and the O'Reilly
Network, see the O'Reilly ...
(707) 829-0 515 (international/local)
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There is a web page for this book, which lists errata, examples, or any additional
information. You can access this page at:...
O''''Reilly Network For Information About''''s Book part 11 ppt
... productive because
they are weakly typed. They are misinformed. Consider this brief Ruby example:
irb(main):003:0> i =1
=> 1
irb(main):004:0> puts "Value of i:" + i
... questions relatively early in the design
process.
4.3 .1. Strong Versus Weak Typing
Strong versus weak typing decides how a type is enforced, or interpreted. In a
weakly typed language (like...
O''''Reilly Network For Information About''''s Book part 12 pptx
... and finishing work later, because much of your code
x2 = 1
10 0.times do
puts x2
x1, x2 = x2, x1+x2
end
It's 6 lines; 16 words; 57 characters. Notice how the code just flows better. ... different, and convert objects that aren't. The
extra syntax provides valuethe compiler has more information to catch bugs
earlier. There's a cost, too. Static typing makes yo...
O''''Reilly Network For Information About''''s Book part 13 ppt
... on information in a variable's type. You can't always get the same contextual
information out of a Ruby or Smalltalk IDE.
4
http://www.agiledeveloper.com/articles/GenericsInJavaPartI.pdf, ... typing reduces certain types of errors (like misspelled variable
names), and provides more information for your IDE and other tools. (Most
security-related typing arguments refer to...
O''''Reilly Network For Information About''''s Book part 17 ppt
... that I interviewed for
this book recognized that static typing limits productivity for application
development dramatically, though some said they were willing to pay the cost for
certain types ... be much more
consistent, and cleaner. The characteristics in Table 5-4 would form a cleaner
foundation for another 10 years of successful growth.
Table 5-4. Important language feat...
O''''Reilly Network For Information About''''s Book part 19 pptx
... irb(main): 010 :0> ('a' 'z') = = = 'h'
=> true
irb(main): 011 :0> ('a' 'z') = = = 'H'
=> false
irb(main): 012 :0> (1 10) ... to primitives and arrays of primitives.
6 .1. 2. Typing
Try to do an assignment without a declaration:
irb(main): 011 :0> n =1
=> 1
irb(main): 012 :0> n.class
=>...
O''''Reilly Network For Information About''''s Book part 21 pptx
...
hours/night)
Lines of code 3,293 1, 164
Lines of configuration 1, 1 61 113
Number of
classes/methods
62/549 55 /12 6
Table 7-2 shows the performance numbers. They're probably a little more
controversial. ...
(no preexisting cache)
71. 89 75.59
User scenario 1 (10 0 runs)
(with preexisting cache)
80.86 17 4.39
never in danger of getting stuck in a corner,
but for...
O''''Reilly Network For Information About''''s Book part 26 pptx
... environments. I used the Squeak IDE for examples in this
chapter. Squeak is a dialect of Smalltalk popularized by Disney.
8.4 .1. A Little Smalltalk Syntax
Before we get too far, you should know ...
block, so links don't get out of sync. The framework manages them for you.
Seaside is modal. This is the author's word for a continuation server
ap
proach. Seaside lets you...
O''''Reilly Network For Information About''''s Book part 41 ppt
... function over
accessing a member function.
[11 ]
The function never throws.
[10 ]
Such functions are known as shims. See [12 ] in the Bibliography.
[11 ]
The idea is that the line between operating ...
responsible for making sure that the reference count is always correct and, if the
reference counter drops to zero, to delete the pointer. Therefore, you must overload
those funct...
O''''Reilly Network For Information About''''s Book part 44 pptx
... the primary reasons for its success, but sometimes
also a formidable source of headaches because of the complexity of certain parts of
the language. For instance, the rules for numeric conversions ... the resource still exists. If it doesn't,
accessing it wreaks havoc. With weak_ptrs, the information that the shared
resource has been destroyed is propagated to all weak_ptrs o...
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