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Medium 9781937434342

9. Metadata

Slice ePub May 28, 2014

Medium 9780596527877

13. LOADING ASSETS

Slice ePub May 27, 2014

Not every project requires assets to be loaded at runtime, but the ability to load files from external sources is extremely important and cannot be overemphasized. Loading assets on the fly reduces initial file size and, therefore, load times, and also increases the degree to which a Flash experience can change. Such change includes not only the all-important dynamic nature of updateable content, but also a streamlined editing process that allows external assets to be altered without having to republish the .fla file every time an update occurs.

The main purpose of this chapter is to cover loading external SWFs and images, to augment prior discussions regarding sound, video, and plain text. However, we also want to briefly address two issues very closely related to loading from remote sources: communication among SWF files of differing ActionScript versions, and security concerns. In this chapter, well look at:

Loading Sound and Video. Necessity required that we cover loading sound and video in Chapter11 and Chapter12, respectively, including fairly robust, dedicated classes that separate the loading of the assets from their use. However, well briefly cover the basics here again to consolidate discussions of loading each major asset type into one chapter.

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Medium 9780596001322

11. Filehandles and File Tests

Source: Learning Perl
Slice ePub May 27, 2014

A filehandle is the name in a Perl program for an I/O connection between your Perl process and the outside world. That is, it's the name of a connection, not necessarily the name of a file.

Filehandles are named like other Perl identifiers (letters, digits, and underscores, but they can't start with a digit), but since they don't have any prefix character, they might be confused with present or future reserved words, as we saw with labels. Once again, as with labels, the recommendation from Larry is that you use all uppercase letters in the name of your filehandlenot only will it stand out better, but it will also guarantee that your program won't fail when a future (lowercase) reserved word is introduced.

But there are also six special filehandle names that Perl already uses for its own purposes: STDIN, STDOUT, STDERR, DATA, ARGV, and ARGVOUT.[1] Although you may choose any filehandle name you'd like, you shouldn't choose one of those six unless you intend to use that one's special properties.[2]

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Medium 9781449367084

A. Troubleshooting Tactics

Slice ePub September 01, 2014

No one gets everything right the first time, so it’s a good idea to be deliberate in how you approach troubleshooting. Here are some tactics we use when our projects do not behave as expected:

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Medium 9781616514211

Number Theory 1

Slice PDF September 11, 2001

Name

Date

Prime Factorization

A number that has only two factors, 1 and itself, is called a prime number. Numbers such as 2, 3, 7 and 11 are prime numbers. A number that has more than two factors is a composite number. Numbers such as 4, 8, 9, and 15 are composite numbers.

You can write any composite number as a product of prime numbers. For example, you can write 18 as the product of several prime numbers.

18 = 2 × 9 prime number

composite number

As you can see 9 is also a composite number. You can factor 9 to 3 × 3.

18 = 2 × 9 = 2 × 3 × 3

Rules for Prime Factorization

1. Find two factors of the number.

2. Determine if the factors are prime.

3. Factor the composite numbers again.

Repeat until you have only prime numbers.

Example

Find the prime factorization of 20.

Step 1 Find two factors of the number.

20 = 5 × 4

Step 2 Determine if the factors are prime or

5 is a prime number;

4 is a composite number.

composite numbers.

Step 3 Factor the composite numbers again.

4 = 2 × 2, so 20 = 5 × 4 = 5 × 2 × 2

All the factors are now prime numbers.

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