[RESOLVED] Javascript: $ Symbol Meaning

What does "$" do exactly? I've seen it in a couple of scripts.

Ex: $name = "rocky";

As far as I'm aware, i makes no difference, as you can start a variable name in Javascript with anything you like...

If you've seen it in one of my scripts, it's a leftover habit because I've been doing a lot of PHP currently, and that requires that all variables begin with a $. As it (as far as I know) makes no difference, I use it to save mistakes in PHP.

Oh ok, I just googled it and sometimes it's used for regex.

What does

Code:

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(div.visible(element) ? 'hide' : 'show']

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do? I want to learn about that syntax.

Quote:

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Originally Posted by code?

What does

Code:

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(div.lement.visible(element) ? 'hide' : 'show']

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do? I want to learn about that syntax.

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Code:

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variable = (condition ? result1 : result2);

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Is equivalent to

Code:

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if (condition) {
  variable = result1;
} else {
  variable = result2;
}

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Lol, one more question...

How would I type up a static class in javascript, So I could easily write...

Code:

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Class.Function.DoIt();

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...without having to write...

Code:

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var Class = new myClass();

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Also, i googled "javascript class" and dug around and found

Code:

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// JavaScript Pet class

function Pet(name) {
    this._name = name;
}

Pet.prototype._name;

Pet.prototype.getName = function() {
    return this._name;
}

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Now, could you get _name without using the getName function?

thats about it.

What about:

Code:

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Pet.prototype.name;
-OR-
Pet.prototype.name = "NO NAME";

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As for a static class, I'll throw you a really complex example - it's a UTF-8 encoder:
Some of the syntax is wierd - I think there using one of the JavaScript variants.

Code:

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var Url = {
    encode : function (string) {
        return escape(this._utf8_encode(string));
    },
    decode : function (string) {
        return this._utf8_decode(unescape(string));
    },
    _utf8_encode : function (string) {
      //Code removed for sanity's sake
    },
    _utf8_decode : function (utftext) {
      //Code removed for sanity's sake
    }
}

s = Url.encode(s)

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The $ (dollar sign) is a custom function. It is not for regex, nor does it have anything to do with PHP.

It was created a few years back to make the process of finding/getting elements much simpler. Take a look at this post from my website. It clarifies this well.

Code:

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(statement) ? true : false;

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This is known as ternary logic. Nice and simple. It takes an if statement to one line and makes the processing much faster.

Quote:

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Originally Posted by code?

How would I type up a static class in javascript, So I could easily write...

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Let's make this much simpler...try using objects. They go hand in hand with classes.

Code:

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var myObject = {
  myFunction = function(str) {
    alert(str);
  },

  myRandomVariable: 'Hello world!'
}

// then to call it
myObject.myFunction('Hello world!');

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