Posts by: Gabriel

Javascript remove spaces method alternative

I had a custom javascript method that used regular expressions to replace all spaces in a given string, but just found an alternative that is worth knowing.

var str = 'this is some text';
var replaced = str.split(' ').join('+');

Will output “thisissometext”.

I have yet to check which is more performant, but at least it’s handy when doing javascript development and I don’t have my personal custom library around.After reading some more, performance results vary a lot depending on the browser used.

You can run some javascript comparisons of regex replacement vs split-join to see for yourself.

ASP.NET Bundling and Minification Gotcha #1 – Javascript bundle not rendering

ASP.NET Logo

Having used a couple of other bundling and minification libraries like Cassette and RequestReduce in the past, I started playing with the new bundling and minification features in ASP.NET 4.5. While setting up bundles is easy, there are quite a few gotchas that are not yet fully documented on the web.

This specific situation/gotcha took me a couple of hours to figure out, and I almost gave up on using Microsoft’s bundling completely.

In order to ease debugging for us developers, bundling and minification only happens if one of the following conditions are met:

1. You’re running with <compilation debug=”false”> on web.config (or without the attribute at all)
2. You force Bundle Optimizations to be ON by specifiying BundleTable.EnableOptimizations = true; on the RegisterBundles method.

When you’re running in debug mode, the files specified on bundles will not be minified or bundled, and tags will be rendered for each file in the bundle.

While that is great, the problem is the way Microsoft assumed that all developers have both development and release versions of each script that they use. As in, if you’re using jQuery, and you want to add jQuery to a bundle, Microsoft will expect you to have both the jQuery-1.8.0.js and the jQuery-1.8.0.min.js files added to your solution.

If you only have the .min.js file in your project, you configure your bundle to use that already-minified script, and you’re running in debug mode, any .min sripts will not be rendered in debug mode. What’s worse, if you only had .min.js scripts in that bundle, nothing will be rendered for it, as if it did not exist or was not configured, nada. No HTML tag for it.

Why?

Because as this StackOverflow question’s accepted answer states, there is a default ignore list that is enforced when rendering the bundle, and for debug mode, all *.intellisense.js, *-vsdoc.js, *.debug.js, *.min.js and *.min.css files are completely excluded from being rendered, because again, Microsoft assumed that you have both release and debugging versions of the scripts or stylesheets that you use in your project.

To be fair, the official tutorial on ASP.NET Bundling and Minification, does mention of some of the conventions, but it can be confusing. The post states:

“Selecting the non “.min” version for debug.”

“Selecting” implies you have choices. If a project only has release (.min.js) versions of a script, they are not added. If they had two choices, but one of the choices is not even an option in the situation, they should default to the other option, not to ignore the script. The post should have stated

“Only non .min versions are included for debug”

Their intention is good, but I believe the assumption/implementation is a bit flawed. I feel if they’re going to ignore a file that you explicitely specified in your bundle configuration, they should at least check for existance of the debug version of the script in your project before ignoring your request to add the release version to the bundle.

So, in order for your bundle to render those .min.js scripts, you have two choices.

1. Just add the debug version of the script you want to use to your project.
2. Clear the ignore list of the bundle (or just the entry you do not want ignored), although there might be side effects to that if you have other scripts of which you do have both versions.

Hope this saves someone a headache.

Bug en Subsonic 3.x al comparar instancias de objetos

He utilizado Subsonic de Rob Conery por varios años, desde sus primera version.

Es un ORM decente, hecho por un buen desarrollador. Subsonic ya no se desarrolla activamente (ahora se enfoca en Massive, su micro ORM), pero la ultima version, 3.0.0.4, sigue siendo utilizada por varios proyectos.

Hace algunas semanas desarrolle una funcionalidad nueva en un proyecto existente, que utilizaba Subsonic, y al estar probando la funcionalidad descubri un bug en Subsonic y la manera en que compara instancias de objetos de la misma clase, haciendo que siempre regrese false en una comparacion.

El codigo problema esta en el metodo Equals, generado por el template T4 de ActiveRecord de Subsonic:

public override bool Equals(object obj)
{
    if(obj.GetType()==typeof(Entity))
    {
        Entity compare=(Entity)obj;
        return compare.KeyValue()==this.KeyValue();
    }
    else
    {
        return base.Equals(obj);
    }
}

Y el metodo KeyValue hace esto:

public object KeyValue()
{
    return this.EntityId;
}

Al estar comparando dos objetos, este metodo es llamado, y si los objetos que se estan comparando son de la misma clase, ejecuta la linea

    return compare.KeyValue()==this.KeyValue();

El metodo KeyValue() simplemente regresa el valor del campo que este asignado como Id de la clase, ya sea un entero, un GUID, long, etc. El problema es que regresa el valor casteandolo a tipo object. Es decir, la siguiente comparacion regresara false, incorrectamente:

    bool testOne = (object)5 == (object)5; //this will return false

No importa que estamos comparando un valor constante, porque lo estamos casteando a ser de tipo object. La comparacion correcta seria comparar los objetos directamente (sin castearlos), o utilizando el metodo Equals de la misma clase.


    bool testTwo = 5.Equals(5); //this will return true, as we expect.

Entonces, para corregir el bug en Subsonic, se puede actualizar el template T4 de la siguiente manera:

public override bool Equals(object obj)
{
    if(obj.GetType()==typeof(<#=tbl.ClassName#>))
    {
        <#=tbl.ClassName#> compare=(<#=tbl.ClassName#>)obj;
        return compare.KeyValue().Equals(this.KeyValue());
    }
    else
    {
        return base.Equals(obj);
    }
}

Es decir, reemplazando la comparacion anterior (que usaba el operador ==) con una llamada explicita al metodo Equals de la instancia del objeto que estamos comparando.

Espero les sirva.

Como borrar entradas individuales del historial de formas AutoComplete de Internet Explorer

Un tip muy sencillo pero no tan obvio..

Si acaso tienen que utilizar Internet Explorer para acceder a algun sitio, y por algun error se grabo un usuario incompleto o incorrecto en la seccion de Auto Complete, al momento de teclear el usuario en otras ocasiones, el texto del usuario incorrecto (o incompleto) sigue apareciendo como opcion para autocompletar, lo cual puede resultar ser muy molesto. Un ejemplo visual es el siguiente:

El usuario correcto es gabrielrdz, pero en alguna ocasion teclee “ga” y probablemente hice click en Enter por error, causando que se grabara “ga” como una entrada de AutoComplete.

Al estar acostumbrado a Chrome o Firefox, donde se pueden borrar o editar cada entrada de autocomplete individualmente, fui a las opciones de Internet Explorer para borrar el usuario incompleto, pero no habia opcion para ver/editar entradas individuales, solo para borrar completamente toda la informacion de AutoComplete.

Para borrar una entrada incorrecta de Internet Explorer AutoComplete, lo unico que hay que hacer, es hacer que se muestre la lista de autocomplete que deseamos editar, tener seleccionada la entrada que queremos borrar, y hacer click en la tecla de Delete.

Espero les sirva.

1 2 3 4 5 … 31  Scroll to top