jQuery appendToArray plugin

With jQuery, I found no real way of grouping elements together (other than using a class, and using filter), so I thought about adding jQuery objects to an array (or multiple arrays), which can then be iterated over with jQuery.each. I tried appendTo (on the off chance that it would work with plain arrays), but no such luck. So I created a simple plugin:

jQuery.fn.appendToArray = function()
{
 var a = arguments;
 for(var i = 0; i < arguments.length; i++) a[i][a[i].length] = this;
 return this;
}

Through using arguments, it can be appending to multiple arrays at the same time:

var ar1 = [];
var ar2 = [];
var $field1 = $("[name='field1']").appendToArray(ar1, ar2);
var $field2 = $("[name='field2']").appendToArray(ar1);
var $field3 = $("[name='field3']").appendToArray(ar1, ar2);
var $field4 = $("[name='field4']").appendToArray(ar2);
var $field5 = $("[name='field5']").appendToArray(ar2);

You can then loop through the arrays, with specific functions applied:

$.each(ar1, function()
 {
  console.log(this.attr("name") + " is in ar1");
 }
);

$.each(ar2, function()
 {
  console.log(this.attr("name") + " is in ar2");
 }
);

Comments

Post a Comment

Popular posts from this blog

Select box manipulation with jQuery

If you read the jQuery mailing list , you may be aware that I have updated my plugins for working with select boxes . Summary of changes: addOption replaces any options with the same value (so think of it as an add/replace options plugin selectOptions selected options in addition to what was already selected, but there is now an option for it not to do this There are two new methods: copyOptions which is for copying options between select boxes ajaxAddOption allows you to add options via AJAX (i.e. could be used for create options dynamically from a server script)
Read more

Shrink Image (JavaScript)

This function shrinks an image, so its dimensions are no bigger than the maximum dimensions you define. // get new dimensions so it fits within the maximum // o = original dimensions / image, m = maximum dimensions function shrink(o, m) { // r = resized var r = {width: o.width, height: o.height}; // if an image, rather than an object, resize it if(o.nodeName && o.nodeName.toLowerCase() == "img") r = o; if(r.width > m.width) { r.height = r.height * (m.width / r.width); r.width = m.width; if(r.height > m.height) { r.width = r.width * (m.height / r.height); r.height = m.height; } } else if(r.height > m.height) { r.width = r.width * (m.height / r.height); r.height = m.height; } return r; } To use, simply supply the image and the dimensions to constrain it to: var image = document.getElementById("image"); var max = {width: 1024, ...
Read more

iTextSharp: Generating a Basic PDF file (ASP.NET/C#)

iTextSharp is free library for .NET that allows you to create PDF documents. It can be used to dynamically create PDF's which can be streamed to the user. As there is no HTML being sent to the user, a WebHandler (ashx file) is a more appropriate way to generate your PDF than an aspx page. Download itextsharp-3.0.10-dll.zip (latest version as of 08 Feb 2006) and save the dll in the archive to your websites bin directory. Here is a basic sample of creating a PDF (more complex samples may follow in future posts). BasicPDF.ashx <%@ WebHandler Language="C#" Class="MyNamespace.BasicPDF" %> using System; using System.IO; using System.Web; using iTextSharp.text; using iTextSharp.text.pdf; namespace MyNamespace { public class BasicPDF: IHttpHandler { public bool IsReusable { get { return true; } } /// <summary> /// Font used for any hyperlinks added to the PDF /// </summary> private Font LinkFont { get ...
Read more