Tutorial Remove Specific Value from Array

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var arr = [1, 2, 3, 4, 5];
var removeItem = 2;   
 
arr = $.grep(arr, function(value) {
  return value != removeItem;
});

Tutorial Persistant Headers on Tables

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When you scroll down a page with a long table on it, typically the header of the table scrolls away and becomes useless. This code clones the table header and applies it at the top of the page once you have scrolled beyond it, and disappears when you have scrolled past the table.

View Demo

function UpdateTableHeaders() {
   $("div.divTableWithFloatingHeader").each(function() {
       offset = $(this).offset();
       scrollTop = $(window).scrollTop();
       if ((scrollTop > offset.top) && (scrollTop < offset.top + $(this).height())) {
           $(".tableFloatingHeader", this).css("visibility", "visible");
           $(".tableFloatingHeader", this).css("top", Math.min(scrollTop - offset.top, $(this).height() - $(".tableFloatingHeader", this).height()) + "px");
       }
       else {
           $(".tableFloatingHeader", this).css("visibility", "hidden");
           $(".tableFloatingHeader", this).css("top", "0px");
       }
   })
}

$(document).ready(function() {
   $("table.tableWithFloatingHeader").each(function() {
       $(this).wrap("<div class="divTableWithFloatingHeader" style="position:relative"></div>");
       $("tr:first", this).before($("tr:first", this).clone());
       clonedHeaderRow = $("tr:first", this)
       clonedHeaderRow.addClass("tableFloatingHeader");
       clonedHeaderRow.css("position", "absolute");
       clonedHeaderRow.css("top", "0px");
       clonedHeaderRow.css("left", "0px");
       clonedHeaderRow.css("visibility", "hidden");
   });
   UpdateTableHeaders();
   $(window).scroll(UpdateTableHeaders);
});

Reference URL

Tutorial Paste Events

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$.fn.pasteEvents = function( delay ) {
    if (delay == undefined) delay = 20;
    return $(this).each(function() {
        var $el = $(this);
        $el.on("paste", function() {
            $el.trigger("prepaste");
            setTimeout(function() { $el.trigger("postpaste"); }, delay);
        });
    });
};

Call this plugin on an element, then you get callback events for before and after pasting:

$("#some-element").on("postpaste", function() { 
    // do something
}).pasteEvents();

Reference URL

Tutorial Password Strength

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$('#pass').keyup(function(e) {
     var strongRegex = new RegExp("^(?=.{8,})(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*\\W).*$", "g");
     var mediumRegex = new RegExp("^(?=.{7,})(((?=.*[A-Z])(?=.*[a-z]))|((?=.*[A-Z])(?=.*[0-9]))|((?=.*[a-z])(?=.*[0-9]))).*$", "g");
     var enoughRegex = new RegExp("(?=.{6,}).*", "g");
     if (false == enoughRegex.test($(this).val())) {
             $('#passstrength').html('More Characters');
     } else if (strongRegex.test($(this).val())) {
             $('#passstrength').className = 'ok';
             $('#passstrength').html('Strong!');
     } else if (mediumRegex.test($(this).val())) {
             $('#passstrength').className = 'alert';
             $('#passstrength').html('Medium!');
     } else {
             $('#passstrength').className = 'error';
             $('#passstrength').html('Weak!');
     }
     return true;
});

Assumes this HTML:

<input type="password" name="pass" id="pass" />
<span id="passstrength"></span>

Tutorial Partial Page Refresh

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Refresh certain elements of a page using jQuery after a set amount of time, can be used with any element with an ID. I amended the example given with the URL to only refresh once and not intermittently. Works in all browsers.

$('#button1').click(function() {

   var url = "http:www.your-url.com?ID=" + Math.random(); //create random number

   setTimeout(function() {
    $("#elementName").load(url+" #elementName>*","");
   }, 1000); //wait one second to run function

});

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Tutorial outerHTML jQuery Plugin

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innerHTML() is native and returns the contents of a DOM node (e.g. <span>I live inside a div.</span>. outerHTML() is not, which would include the current DOM node (e.g. <div><span>I live inside a div.</span></div>). This is a chain-able jQuery version of doing that.

$.fn.outerHTML = function(){
 
    // IE, Chrome & Safari will comply with the non-standard outerHTML, all others (FF) will have a fall-back for cloning
    return (!this.length) ? this : (this[0].outerHTML || (
      function(el){
          var div = document.createElement('div');
          div.appendChild(el.cloneNode(true));
          var contents = div.innerHTML;
          div = null;
          return contents;
    })(this[0]));
 
}

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Tutorial Open External Links In New Window

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$('a').each(function() {
   var a = new RegExp('/' + window.location.host + '/');
   if(!a.test(this.href)) {
       $(this).click(function(event) {
           event.preventDefault();
           event.stopPropagation();
           window.open(this.href, '_blank');
       });
   }
});

You can do this straight with HTML, but that is invalid markup, this takes care of business without invalid code and unnecessary markup.

Or, you can still avoid the validation problems and just append the class target=_blank thing to any links with href attributes starting with http://. The example below only targets links in a #content area. Scoping down like that might be a good idea in case your menus are dynamic and create full URLs.

$("#content a[href^='http://']").attr("target","_blank");

Also note that there are a wide variety of different ways to only target external links.