I am working on a project with quite a lot of JQuery in it. The JQuery has a lot of $ signs everywhere, for example
$(document).ready(function () {
$('input[type=file]').wl_File({
url: '/Admin/PolicyInventory/UploadDocuments',
onFileError: function (error, fileobj) {
$.msg('file is not allowed: ' + fileobj.name, {
header: error.msg + ' Error ',
live: 10000
});
}
});
...
My question is, what does this dollar sign mean? Why is it used all over the place and how do I understand and interpret it? It reminds me of the scary days of when I was learning Scheme at University and had to put brackets everywhere without knowing why I was doing it.