Programmer's Reference http://tech.oscarvalles.com An Analyst's Experiences Wed, 23 Nov 2011 10:04:34 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 Running Python on GoDaddy http://tech.oscarvalles.com/2011/11/running-python-on-godaddy/?utm_source=rss&utm_medium=rss&utm_campaign=running-python-on-godaddy http://tech.oscarvalles.com/2011/11/running-python-on-godaddy/#comments Wed, 23 Nov 2011 10:04:34 +0000 oscarvalles http://tech.oscarvalles.com/?p=217 http://tech.oscarvalles.com/2011/11/running-python-on-godaddy/feed/ 0 Non-invocable member System.Data.DataSet.Tables cannot be used like a method http://tech.oscarvalles.com/2010/11/non-invocable-member-system-data-dataset-tables-cannot-be-used-like-a-method/?utm_source=rss&utm_medium=rss&utm_campaign=non-invocable-member-system-data-dataset-tables-cannot-be-used-like-a-method http://tech.oscarvalles.com/2010/11/non-invocable-member-system-data-dataset-tables-cannot-be-used-like-a-method/#comments Sat, 27 Nov 2010 04:42:48 +0000 oscarvalles http://tech.oscarvalles.com/2010/11/non-invocable-member-system-data-dataset-tables-cannot-be-used-like-a-method/ After filling in your dataset with your data adapter, you probably want to transfer that information to a DataTable so that you can display it on a your page's datagrid, use it in an export to .csv function or something to that nature. However during compile time you may receive the following error:

Non-invocable member 'System.Data.DataSet.Tables' cannot be used like a method

One of the reasons you may be receiving this error is due to the way you have the DataTable name enclosed.  It should be in brackets instead of parenthesis.

]]> http://tech.oscarvalles.com/2010/11/non-invocable-member-system-data-dataset-tables-cannot-be-used-like-a-method/feed/ 0 Rules for exponents http://tech.oscarvalles.com/2010/11/rules-for-exponents/?utm_source=rss&utm_medium=rss&utm_campaign=rules-for-exponents http://tech.oscarvalles.com/2010/11/rules-for-exponents/#comments Sat, 27 Nov 2010 04:42:48 +0000 oscarvalles http://tech.oscarvalles.com/2010/11/rules-for-exponents/ This article discusses the practical application of exponent rules and how they relate to business and finance scenarios.

A common use of exponents in business and personal finance is the investment of money at a fixed rate for a variable period of time.  For example, let's say we have $10,000 we want to invest.  A CD yields a 6% annual rate, so we decide we want to invest it for 20 years since.  What will be it's value when the CD matures?

]]> http://tech.oscarvalles.com/2010/11/rules-for-exponents/feed/ 0 Various ways to solve for a linear equation http://tech.oscarvalles.com/2010/11/various-ways-to-solve-for-a-linear-equation/?utm_source=rss&utm_medium=rss&utm_campaign=various-ways-to-solve-for-a-linear-equation http://tech.oscarvalles.com/2010/11/various-ways-to-solve-for-a-linear-equation/#comments Sat, 27 Nov 2010 04:42:48 +0000 oscarvalles http://tech.oscarvalles.com/2010/11/various-ways-to-solve-for-a-linear-equation/ Linear equations can be presented to you in various ways and by the same token you can solve a linear equation a number of ways. The first step in solving a linear equation is determining the slope.
Here is a list of ways to arrive at the slope.
 
1.)    Given a graphed line, choose two points on the line. Count the rise on the y-axis over the run on the x-axis. Essentially, the slope, m, = rise/run.
2.)    Starting with the coordinates of two points on line (x<]]> http://tech.oscarvalles.com/2010/11/various-ways-to-solve-for-a-linear-equation/feed/ 0 Rules for overriding methods http://tech.oscarvalles.com/2010/11/rules-for-overriding-methods/?utm_source=rss&utm_medium=rss&utm_campaign=rules-for-overriding-methods http://tech.oscarvalles.com/2010/11/rules-for-overriding-methods/#comments Sat, 27 Nov 2010 04:42:48 +0000 oscarvalles http://tech.oscarvalles.com/2010/11/rules-for-overriding-methods/ In C#, when you have a method in a base class that you would like to use in a derived class but with some modifications you are overriding a method.  When overriding a method in a derived class you must have the exact same signature as the method you are going to override in the base class.  In addition, it is good practice to include the virtual keyword in the signature of the base class method that is to be overridden by a derived class method.

Example method in base class:

]]> http://tech.oscarvalles.com/2010/11/rules-for-overriding-methods/feed/ 0 Real Numbers http://tech.oscarvalles.com/2010/11/real-numbers/?utm_source=rss&utm_medium=rss&utm_campaign=real-numbers http://tech.oscarvalles.com/2010/11/real-numbers/#comments Sat, 27 Nov 2010 04:42:48 +0000 oscarvalles http://tech.oscarvalles.com/2010/11/real-numbers/ Real numbers include:

  1. Rational Numbers
  2. Irrational Numbers

Rational Numbers include:

  1. Integers
  2. Whole Numbers
  3. Natural Numbers (a.k.a. counting numbers}

Integers include:

  1. Whole Numbers {0, 1, 2, 3, ...}
  2. Natural Numbers (a.k.a. Counting Numbers) {1, 2, 3, ...}

Whole Numbers include:

]]> http://tech.oscarvalles.com/2010/11/real-numbers/feed/ 0 Signature of a Method – C# http://tech.oscarvalles.com/2010/11/signature-of-a-method-c/?utm_source=rss&utm_medium=rss&utm_campaign=signature-of-a-method-c http://tech.oscarvalles.com/2010/11/signature-of-a-method-c/#comments Sat, 27 Nov 2010 04:42:47 +0000 oscarvalles http://tech.oscarvalles.com/2010/11/signature-of-a-method-c/ A signature of a method consists of:

  1. The name of the method (e.g. Main(), ComputeCost(), OtherUserDefinedMethodName())
  2. Modifiers (public, public static, private, private static, etc...)
  3. Types of its formal parameters

The formal parameters are inside the method parenthesis.  Examples include:

]]> http://tech.oscarvalles.com/2010/11/signature-of-a-method-c/feed/ 0 Using @OFFSET in SPSS Clementine http://tech.oscarvalles.com/2010/11/using-offset-in-spss-clementine/?utm_source=rss&utm_medium=rss&utm_campaign=using-offset-in-spss-clementine http://tech.oscarvalles.com/2010/11/using-offset-in-spss-clementine/#comments Sat, 27 Nov 2010 04:42:47 +0000 oscarvalles http://tech.oscarvalles.com/2010/11/using-offset-in-spss-clementine/ @OFFSET in SPSS Clementine Explained:
 
A few years back I asked Satheesh from Elite Analytics what the @OFFSET function in SPSS Clementine was for. He provided the following explanation (paraphrased):
 
@OFFSET basically allows you to access the value of any record other than the current one. 
 
Code:
 
http://tech.oscarvalles.com/2010/11/using-offset-in-spss-clementine/feed/ 0 Write one event handler to multiple objects in Visual Studio .NET and C# http://tech.oscarvalles.com/2010/11/write-one-event-handler-to-multiple-objects-in-visual-studio-net-and-c/?utm_source=rss&utm_medium=rss&utm_campaign=write-one-event-handler-to-multiple-objects-in-visual-studio-net-and-c http://tech.oscarvalles.com/2010/11/write-one-event-handler-to-multiple-objects-in-visual-studio-net-and-c/#comments Sat, 27 Nov 2010 04:42:47 +0000 oscarvalles http://tech.oscarvalles.com/2010/11/write-one-event-handler-to-multiple-objects-in-visual-studio-net-and-c/ This example will illustrate how to write one event handler to multiple objects.  This example utilizes the checkbox objects.  In the app, the user has an option to check up to four checkboxes.  Each time he checks one, the total dollar value for each item the user is checking is displayed on a label. 

]]> http://tech.oscarvalles.com/2010/11/write-one-event-handler-to-multiple-objects-in-visual-studio-net-and-c/feed/ 0 Repeating items in an ASP.NET page using the repeater web control http://tech.oscarvalles.com/2010/11/repeating-items-in-an-asp-net-page-using-the-repeater-web-control/?utm_source=rss&utm_medium=rss&utm_campaign=repeating-items-in-an-asp-net-page-using-the-repeater-web-control http://tech.oscarvalles.com/2010/11/repeating-items-in-an-asp-net-page-using-the-repeater-web-control/#comments Sat, 27 Nov 2010 04:42:47 +0000 oscarvalles http://tech.oscarvalles.com/2010/11/repeating-items-in-an-asp-net-page-using-the-repeater-web-control/ This code here demonstrates the 4 things, populating an array.  Assigning the values of the array to a data source and binding the array.  Lastly displaying the results on a web page.  You can copy and paste the code to test it out.

]]> http://tech.oscarvalles.com/2010/11/repeating-items-in-an-asp-net-page-using-the-repeater-web-control/feed/ 0