Good article on how to make aspx page lighter

http://polymorphicpodcast.com/shows/controlhtml

Searching for something in dbml

 So far, I've found 2 ways to find something in dbml:

 1) through designer generated code, usually happens by using ReSharper

 2)  using properties panel - if you are visual mode, there is a dropdown on the top of the properties panel, which will show you all objects in the dbml diagram.

Entity Framework 4.4

 Old versions of Entity Framework were really more trouble than they were worth.
 Case to the point - if you are using version of EF that does not support foreign keys, you are actually better of not having them defined on the table at all, because then they are treated as any other value in the table.
If they are defined as foreign keys, then you have to go to extra trouble and retrieve them, as they would be recognized as unsupported property and have value of null.

Javascript - Empty space in numeric field

 I run into the issue when isNaN was returning false for empty string.
 Turned out this is by design, because isNan is comparing coerced values - coercing empty string into 0, and of course, not having issue with 0 not being a number.
 To make sure that user has to enter 0, I added this to the check:

 isNan(parseInt(field))

Of course, this is not comprehensive solution, Douglas Crockford has more to say on this topic, especially on recognizing the numbers, but it worked for simple validation I was aiming for.

How to force dropdown to open in javascript / jquery

     Force dropdown to open
      
     $("#selSizes").attr("size", "5")

Difference between call and apply in JavaScript

 Here's the main difference - do you know the number of arguments beforehand?

1) Use apply if you don't know the number of arguments you will be passing, (or if they are already in an array or array-like object).

2) Use call otherwise, since there's no need to wrap the arguments in an array.

f.call(thisObject, a, b, c); // Fixed number of arguments

f.apply(thisObject, arguments); // Forward arguments

var args = [];
while (...) {
    args.push(some_value());
}
f.apply(thisObject, args); // Unknown number of arguments

Knockout and ()

  I have to put post-it note somewhere:

  PUT ( ) on every binding that's part of the expression!

 It's so misleading - if you have regular  data binding to the something like this:

<div data-bind="text: customer.name"></div>

 that works without parenthesis.

 If you have expression, don't forget your ()!


'class': $root.currentColor().name() === $data.name() ? ...