Archive for January, 2008

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JavaScript String Functions

Author: Jimmy

19 Jan

Matt Snider has shown us JavaScript String helper functions that recalls the ones I used in my project recently — a bundle of functions collected from many sources. Frankly, some of them are not very efficient.

String.prototype.ellipse = function(maxLength){
    if(this.length &gt; maxLength){
        return this.substr(0, maxLength-3) + '...';
    }
    return this;
};
 
String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g, '');
};

He used YAHOO.lang.augmentObject to augment the String.prototype providing with most needed and missing functionality: word capitalization, stripping characters (alpha, numbers, etc…), stripping tags (script, or all html tags), and trimming white spaces.

YAHOO.lang.augmentObject(String.prototype, {
 
	/**
	 * Capitolize the first letter of every word; ucfirst, ensures that all non-first letters are lower-case
	 *
	 * @method capitalize
	 * @param ucfirst {boolean} OPTIONAL: when truthy, converts non-first letters to lower-case
	 * @return {string} the converted string
	 * @static
	 */
	capitalize: function(ucfirst) {
		var words = this.split(/b/g),
			rs = [];
 
		Core.batch(words, function(w, i) {
			if (w.trim()) {
				rs[i] = w.charAt(0).toUpperCase() + (ucfirst? w.substring(1).toLowerCase(): w.substring(1));
			}
		});
 
		return rs.join(’ ‘);
	},
 
		/**
		 * Checks if a string contains any of the strings in the arguement set
		 *
		 * @method contains
		 * @param argument {string} as many strings you want to test
		 * @return {boolean} true, if string contains any of the arguements
		 * @static
		 */
		contains: function() {
			var hasValue = false;
 
			Core.batch(arguments, function(arg) {
				hasValue = -1 &lt; str.indexOf(arg); // terminates iteration if this becomes true
				return hasValue;
			});
 
			return hasValue;
		},
 
	/**
	 * Removes the rx pattern from the string
	 *
	 * @method remove
	 * @param rx {regex} a regex to find characters to remove
	 * @public
	 */
	remove: function(rx) {
		return this.replace(rx, '');
	},
 
	/**
	 * Remove all non-alpha characters;space ok
	 *
	 * @method stripNonAlpha
	 * @public
	 */
	stripNonAlpha: function() {
		return this.remove(/[^A-Za-z ]+/g);
	},
 
	/**
	 * Remove all non-alpha-numeric characters; space ok
	 *
	 * @method stripNonAlphaNumeric
	 * @public
	 */
	stripNonAlphaNumeric: function() {
		return this.remove(/[^A-Za-z0-9 ]+/g);
	},
 
	/**
	 * Removes non-numeric characters, except minus and decimal
	 *
	 * @method stripNonNumeric
	 * @public
	 */
	stripNonNumeric: function() {
		return this.remove(/[^0-9-.]/g);
	},
 
	/**
	 * Remove all characters that are 0-9
	 *
	 * @method stripNumeric
	 * @public
	 */
	stripNumeric: function() {
		return this.remove(/[0-9]/g);
	},
 
	/**
	 * HTML script tags from the string
	 *
	 * @method stripScripts
	 * @public
	 */
	stripScripts: function() {
		return this.remove(new RegExp(‘(?:
)((n|r|.)*?)(?:)’, ‘img’));
	},
 
	/**
	 * HTML tags from the string
	 *
	 * @method stripTags
	 * @public
	 */
	stripTags: function() {
		return this.remove(/]+&gt;/gi);
	},
 
	/**
	 * Replaces the white spaces at the front and end of the string
	 * OPTIMIZED: http://blog.stevenlevithan.com/archives/faster-trim-javascript
	 *
	 * @method trim
	 * @public
	 */
	trim: function() {
		return this.remove(/^ss*/).remove(/ss*$/);
	}
});

He said he had put a lot of thought into some of these methods, such as trim, to achieve the most efficient regex.

I like the way he put them all together and surely I’ll use them in my projects in future.

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0 Comments

Filed under: Ajax - JavaScript

MySQL Acquired: A billion dollars behind the M in LAMP

Author: Jimmy

17 Jan

Finally, after many rumors of a (big) upcoming IPO, MySQL AB has been acquired by Sun for 1$ billion instead. MySQL had raised a total of $39 million from Benchmark, Index, IVP, Intel, and SAP. Sun CEO Jonathan Schwartz wrote about the acquisition on his blog: "But the biggest news of the day is... we're putting a billion dollars behind ...

0 Comments

Filed under: MySQL

How can Microsoft Volta talk smack about GWT?

Author: Jimmy

15 Jan

Microsoft Volta was often referred to as a GWT copycat (carelessly). Yes, Volta does generate JavaScript but it does so in a somewhat different way than GWT: while GWT reads Java code and compiles to JavaScript, Volta reads bytecode (.NET IL) and compiles to JavaScript. And Volta uses the existing .Net APIs instead of defining its own UI APIs like GWT ...

0 Comments

Filed under: Ajax - JavaScript, GWT

2nd Birthday of JQuery

Author: Jimmy

15 Jan

John Resig, the creator and lead developer of the jQuery JavaScript library, looks back when JQuery was born: I remember doing the first release at BarCamp NYC (combined with the mention of two other projects of mine that fizzled: Feed Pile and Idea Shrub). While I had released a bunch of open source code in the past, this was the first ...

1 Comment

Filed under: Ajax - JavaScript, JQuery

Replace Prototype with JQuery on Rails

Author: Jimmy

14 Jan

Looking for Prototype/script.aculo.us replacement on Rails? jRails project can be an answer if you prefer JQuery. Here is info from project site: Features jRails provides drop-in functionality for these existing Rails methods. Prototype form_remote_for form_remote_tag link_to_remote observe_field observe_form periodically_call_remote remote_form_for submit_to_remote Scriptaculous draggable_element drop_receiving_element sortable_element visual_effect RJS hide insert_html remove replace replace_html show toggle Visual Effects The visual effects in jRails are based on the new jquery-fx library. jRails currently uses a slightly modified version of jquery fx code to get some of the desired effects. ...

7 Comments

Filed under: Ajax - JavaScript, JQuery, Ruby on Rails

Now Come “The Rails Way”

Author: Jimmy

13 Jan

Long awaited book stating itself as the "expert guide to building Ruby on Rails applications" has finally come. This book will help you: Increase your productivity as a web developer Realize the overall joy of programming with Ruby on Rails Learn what's new in Rails 2.0 Drive design and protect ...

0 Comments

Filed under: Book Reviews, Ruby on Rails

Why Should You Try Rails This Year?

Author: Jimmy

12 Jan

Myles Eftos has given 6 things try Rails this year. They are: Install Rails: This is aimed at those of you out there that haven’t tried Ruby on Rails yet. Jump in - have a go, there are plenty of resources out there, and it is fairly easy to install regardless of your platform Upgrade to Rails 2.0: I have covered what’s ...

0 Comments

Filed under: Ruby on Rails

Hubble Space Telescope 2.0

Author: Jimmy

11 Jan

One of Hubble's most famous images: pillars of creation where stars are forming in the Eagle Nebula. Credit: NASA/ESA What are new upgrades in Hubble Space Telescope version 2.0? They will make the Hubble telescope 100 times more powerful. And, big news, they will add Web 2.0 functionality on the companion website "hubbl.". You'll ...

8 Comments

Filed under: Web 2.0

Do you need GWT on Rails?

Author: Jimmy

10 Jan

Oh, my first thought was "It's silly to add Java to Rails" because normally GWT uses the Java language to generate JavaScript. But I changed my mind after reading Jon Crosby's answers to a short interview from InfoQ: Most of Java's weight comes from JEE, which is not part of GWT on Rails. Client side GWT uses the Java language to ...

0 Comments

Filed under: GWT, Ruby on Rails

10 Notable O’Reilly Books in 2007

Author: Jimmy

9 Jan

Tim O’Reilly opines on notable tech books from 2007 -- just have a quick look on his list. Mac OS X Leopard: The Missing Manual: this book sold out of its 50,000 copy first printing in a few of days. In the fourth quarter of 2007, the total size of the ...

3 Comments

Filed under: Book Reviews

Pages (3): « 1 2 3 »

Just Talk About Web

Archive for January, 2008

JavaScript String Functions

MySQL Acquired: A billion dollars behind the M in LAMP

How can Microsoft Volta talk smack about GWT?

2nd Birthday of JQuery

Replace Prototype with JQuery on Rails

Now Come “The Rails Way”

Why Should You Try Rails This Year?

Hubble Space Telescope 2.0

Do you need GWT on Rails?

10 Notable O’Reilly Books in 2007

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