Here is the trim() function (gist page):

/**
 * trim: removes leading and trailing white space
 */
String.prototype.trim = function () {
	return this.replace(/^\s+|\s+$/g, "");
};

And the toCamelCase() function (gist page):

/**
 * toCamelCase: converts string to camel case
 */
String.prototype.toCameCase = function () {
	return this.replace(/^\s+|\s+$/g, "")
		.toLowerCase()
		.replace(/(\s[a-z0-9])/g, function ($1) {
			return $1.replace(/\s/, '').toUpperCase();
		})
		.replace(/\W/g, '');
};

And the toDashed() function (gist page):

/**
 * toDashed: converts string to dashed
 */
String.prototype.toDashed = function () {
	return this.replace(/^\s+|\s+$/g, "")
	.toLowerCase()
	.replace(/-/g, '')
	.replace(/(\s[a-z0-9])/g, function ($1) {
		return $1.replace(/\s/, '-');
	})
	.replace(/[^a-z0-9-]/g, '');
};

And finally, the toUnderscored() function (gist page):

/**
 * toUnderscored: converts string to underscored
 */
String.prototype.toUnderscored = function () {
	return this.replace(/^\s+|\s+$/g, "")
	.toLowerCase()
	.replace(/_/g, '')
	.replace(/(\s[a-z0-9])/g, function ($1) {
		return $1.replace(/\s/, '_');
	})
	.replace(/[^a-z0-9_]/g, '');
};

Here’s my custom modifier function from my functions.php file:

function get_archives_option_mod ( $link_option ) {
   preg_match ("/value=[\'\"](.+?)[\'\"]/", $link_option, $url);
   $requested = "http://{$_SERVER['SERVER_NAME']}{$_SERVER['REQUEST_URI']}";
      if ($requested == $url[1]) {
         $link_option = str_replace("<option value=", "<option selected=\"selected\" value=", $link_option);
      }
      return $link_option;
   }
add_filter("get_archives_link", "get_archives_option_mod");

Initializing a repository

git init
git add *
git commit -m 'initial commit'

Then create your repository on Github: my_repo_name with my_user_account

git remote add origin git@github.com:my_user_account/my_repo_name.git
git push origin master

Checking what is not yet committed:

git status -s

Adding all new/updated files:

git add *

Adding a file by name:

git add /path/to/file

Committing the additions:

git commit -m 'comment for this commit'

Pushing the updates:

git push

Updating a local repository with remote content:

git remote update

Another useful one to delete remote files that were deleted locally:

for i in `git status | grep deleted | awk '{print $3}'`; do git rm $i; done