Is it ok to remove the $ in javascript function

Question

Is it ok to remove the dollar sign in javascript function? Does it affect to functionality of the whole code inside of it?

from this

$(function() {
    // code
});

to this

(function() {
    // code
});

Answer 1

From this question: What is the meaning of "$" sign in javascript

There's nothing mysterious about the use of "$" in JavaScript. $ is simply a valid JavaScript identifier.

JavaScript allows upper and lower letters, numbers, and $ and _. The $ was intended to be used for machine-generated variables (such as $0001).

Prototype, jQuery, and most javascript libraries use the $ as the primary base object (or function). Most of them also have a way to relinquish the $ so that it can be used with another library that uses it. In that case you use "jQuery" instead of "$". In fact, "$" is just a shortcut for "jQuery".

and

The $ represents the jQuery Function, and is actually a shorthand alias for jQuery. (Unlike in most languages, the $ symbol is not reserved, and may be used as a variable name.) It is typically used as a selector (i.e. a function that returns a set of elements found in the DOM).

Answer 2

Doing

$(function() {
    // code
});

is just calling the jQuery function. It's just function, imagine something like this:

function $(callback){
    //do many things

    //call the callback
    callback();
}

Indeed it's defined like this:

function( selector, context ) {
    // The jQuery object is actually just the init constructor 'enhanced'
    // Need init if jQuery is called (just allow error to be thrown if not included)
    return new jQuery.fn.init( selector, context );
}