Archive for May 2008
Netscape Browser is dead
On March 1st, 2008, AOL stop all supports as well as security updates.
AOL recommends Firefox or Flock as migration options.
Netscape has officially passed away.
Resources:
Languages Numeric Types
C & C++ References:
- http://home.att.net/~jackklein/c/inttypes.html
- http://www.space.unibe.ch/comp_doc/c_manual/C/CONCEPT/data_types.html
C Trivia:
- In C, long is both modifier and data type.
- Long Long Int is not available in C++
- <limits.h> header contains max & min information of numeric types.
C & C++ Numerical Types:
- ShortInt — 2 bytes and 16 bits
- Int — 2 bytes and 32 bits
- Long Int — 2 bytes and 32 bits
- Long Long Int (C only) — 4 bytes and 64 bits
- Double — 64 bits
CPython Reference:
CPython Numerical Types:
- Int ( use Long Int in C ) — 32 bits precision.
- Float (use Double in C) — 64 bits precision.
- Long — Unlimited precision.
- Complex (use Double in C)
Java References:
- http://www.cafeaulait.org/course/week2/02.html
- http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Number.html
Java Primitive Numerical Types:
- Short — 2 bytes and 16 bits
- Int — 2 bytes and 32 bits
- Long — 8 bytes
- Float — 4 bytes
- Double — 8 bytes
Java Other Numerical Types:
- BigInt
- BigDecimal
PHP References:
PHP Trivia:
- There’s no real concept of numeric data type in PHP (PHP 4.2 and newer supporters can argue me on this).
- You don’t set date type on numeric variables, PHP determines data type for you.
- 32 bit systems have a maximum signed integer range of -2147483648 to 2147483647.
- The maximum signed integer value for 64 bit systems is 9223372036854775807.
PHP Numerical “Types”:
- bool
- integer
- float
Perl References:
Perl Numerical Types:
- Integer
- Float
- Decimal
Perl Trivia:
- Decimal strings may have an exponential notation part, as in
"12.34e-56".
PHP Date Time
is more or less annoying. Before fanbois comment me to oblivion, let me explain why.
DateTime and DateTimeZone are objects. They can be created using new DateTime() and new DateTimeZone() calls.
Why is it not documented anywhere? Instead, the documentation points to global function calls.
The global function for new DateTime is date_create(), while global function for new DateTimeZone is timezone_open(). How intuitive.
Talk about intuitiveness. date() does not return DateTime object. It returns string, but of course, that’s how it always be.
Now let’s talk about timezone_open(…). If you pass an invalid parameter, it WILL return false, but, it will also throw:
Warning: timezone_open() [function.timezone_open]: Unknown or bad timezone
Damn, that behavior is reported here.
More about timezone, did you know that you can call setTimezone() on DateTime object? I found it out by lucky guess. Where’s that documented on php.net?
Finally, when calling dateObject->format(‘U’), I was expecting to get “Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)” –> pulled from php.net. But I didn’t get such results.
The seconds returned was not based on UTC timezone. It was based on the default php.ini, which was local timezone (PST).
So make sure before formatting to UTC, you call:
dateObject->setTimezone(new DateTimeZone(‘UTC’)) or
dateObject->setTimezone(timezone_open(‘UTC’)) or
don’t even bother creating object, just use: gmmktime()
Have fun with DateTime!
References:
SWFObject: Embedding SWF using Javascript
SWFObject is a javascript open source project that generates SWF <embed> html tags.
Seems so trivial, why do I or readers need this?
Advantages of SWFObject:
- It can generates embed tags dynamically.
- It worries about multi-browsers support, so that you don’t have to.
- There are multiple ways of embedding SWF, with SWFObject, you don’t have to worry about that.
Why you should use SWFObject (from its wiki page):
- Is more optimized and flexible than any other Flash Player embed method around
- Offers one solution for everybody: It shouldn’t matter if you are an HTML, Flash, or JavaScript developer, there should be something in it for everyone
- Breaks the cycle of being locked into vendor specific markup and promotes the use of web standards and alternative content
- Uses unobtrusive JavaScript and JavaScript best practices
- Is easy to use
Resources:
Microsoft did not buy Yahoo!
Actionscript: Associative vs List-like Array
Constructing Arrays
In Actionscript, Associative array is not defined using Array type. To construct associative array, one must use Object type.
e.g. var assocArray:Object = new Object();
Array type is strictly behaving like an ordered, numerically indexed, list.
e.g. var regArray:Array = ['a', 'b', 'c'];
Arrays Length
Array type has length property. This length property can be used in for loop.
e.g. for(var i:int = 0; i < array.length; i++) { … }
On the other hand, Object does not have length property. In order to loop through every property in an Object, one can use a different syntax of for loop.
e.g. for(var i:String in assocArray) { trace(assocArray[i]); }
References
