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Basics of Ruby: Part 1 (Data Types/Data Storage)

Ruby is a dynamic, general-purpose programming language created by Yukihiro "Matz" Matsumoto in Japan around the mid-90's. It has many uses but with it's flexibility, it makes a great language to write exploits in. In fact, the entire Metasploit Framework is written in Ruby! The sole purpose of this series is to teach hackers the basics of Ruby, along with some more advanced concepts that are important in hacking.

How To: Avoid Losing Your Unlimited Data Plan When Upgrading to the iPhone 5

The iPhone 5 will be here in no time. Pre-orders started at 12:01AM PST this morning and it's expected to start shipping in about two weeks. Verizon, AT&T, and Sprint are all handling unlimited data plans differently, so if you currently have an unlimited plan and are going to get the iPhone 5, you'll want to know what your carrier is doing before you upgrade so you don't end up with a very unpleasant surprise on your next phone bill. Verizon

How To: Create a line-graph in Excel 2007

In excel a left click is made on box A1 and the X title is typed in as year. In A2 the year 2001 is typed and in A3 the year 2002. Both A2 and 3 boxes are highlighted and the bottom right hand corner is used to drag the work into a copied sequence down to A12. In B1 "population in billions" is typed. From the web site the data is copied and typed in as it appeared and the numbers are rounded off. A click is made on the "insert" tab and line is selected from the menu which appears. The upper l...

How To: Securely erase files on a Mac

Did you know that even after you've emptied your Mac's trash can, the data still has not been permanently removed from your system? Anyone who knew where to look could easily unearth this data. You can prevent this by using the secure empty trash option on your Mac. Whenever you put something in the trash, instead of pressing delete, go into 'finder' up top and press 'secure empty trash'. What this will do is replace the data that is left behind on your hard drive with random ones and zeros. ...

How To: Add geolocation data to posts on a WordPress blog or website

Want to add location data to posts on a self-hosted WordPress blog or website? This clip will show you the way. Every version of WordPress brings with it new features, new functions and new ways of doing things. Fortunately, the very same technology that allows an open-source blog publishing application like WordPress to exist in the first place also makes it easy for its users to share information about the abovesaid things through videos like this one. Take a look.

How To: Extract the rows in a data set to 1 column in MS Excel

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 650th installment in their series of digital spreadsheet magic tricks, you'll learn see how to take all records from a data set and place them into one column using the INDEX, INT, ROWS and MOD functions.

How To: Create a frequency polygon line chart in MS Excel

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 655th installment in their series of digital spreadsheet magic tricks, you'll learn see how to create a statistical frequency polygon using a line chart. Also see how Excel mistakenly interprets number category label data as Number Series data.

How To: Build a Java applet to write data to a file

Want to program your own Java games and applications but don't know beans about object-oriented programming? Never you fear. This free video tutorial from TheNewBoston will have you coding your own Java apps in no time flat. Specifically, this lesson discusses how to write data to an external file when writing code in the Java programming language. For more information, including detailed, step-by-step instructions, watch this helpful programmer's guide.

How To: Calculate a trimmed mean in Microsoft Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 36th installment in his "Excel Statistics" series of free video lessons, you'll learn how to calculate a trimmed mean, which is used when there are extreme values in the data set that might skew the mean.

How To: Create an X-Y scatter diagram chart in Microsoft Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 39th installment in his "Excel Statistics" series of free video lessons, you'll learn about variability (or dispersion or spread). Create an X-Y Scatter Diagram chart showing data points and the mean.

How To: Create percent & relative freq. distributions in Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 25th installment in his "Excel Statistics" series of free video lessons, you'll learn how to create quantitative data percent & relative frequency distributions with pivot tables. Also see how to create a histo...

How To: Make distributions, ogive charts & histograms in Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 22nd installment in his "Excel Statistics" series of free video lessons, you'll learn how to create a percent (%) cumulative frequency distribution with formulas, a histogram and an ogive chart. See how to add ...

How To: Create frequency distributions with Excel pivot tables

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 15th installment in his "Excel Statistics" series of free video lessons, you'll learn how to use create a frequency distribution, relative frequency distribution, percent frequency distribution and pie chart wi...

How To: Create a dynamic area chart in Microsoft Excel

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 351st installment in their series of digital spreadsheet magic tricks, you'll learn how to create an area chart for x and f(x) data as well as how to use the IF function to show a second data set plotted to show a specific area section.

How To: Sum a table of data by year & month in Microsoft Excel

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 183rd installment in their series of digital spreadsheet magic tricks, you'll learn how to sum revenue from a table of data by year and month using the SUMPRODUCT, TEXT, SUM, IF & LEFT functions in an array formula.

How To: Extract data to a new Excel workbook by array formula

New to Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. With this video tutorial from ExcelIsFun, the 308th installment in their series of digital spreadsheet video tutorials, you'll learn how to extract data to a new workbook by array formula. Functions used include IF, ROWS, INDEX, TEXT, ROW and SUMPRODUCT.

How To: Create a custom profile divider in ASP.Net

In this video tutorial, Chris Pels shows how to create a custom profile provider to store and retrieve data associated with a user profile in SQL Server tables separate from the standard ASP.NET membership provider’s aspnet_Profile table. The principles covered in this video will apply to creating profile providers for other databases like Access and Oracle. After learning how to create the custom profile provider we learn how to install the provider in a web site and see a demonstration of l...

How To: Plug the data cable into the Samsung Galaxy Tab

Okay, so you might not need a how-to for this one, but nonetheless, just in case, here you go— plugging in the data cable to your Samsung Galaxy Tab. It's basically the same way you plug in all mobile devices these days, and it's just like any other Android tablet, so you should be able to do it with little difficulty. Just don't force it in, or you risk damaging it and your device.

How To: Use Eraser to permanently erase data

In this tutorial, we learn how to use Eraser to permanently erase data. First, open up Internet Explorer and search for "eraser". Once you do this, click on the first link that you see. Then, go to the download section of the website and download the first version that you see, it will be the newer version. Choose the bit processor that you have, then wait for it to download on your computer. Now install it and go to your Start menu to find the application. After this, open up the Eraser, the...

How To: Calculate variance and standard deviation using Excel

This video shows the method to find the variance and standard deviation using Excel. The variance shows the variability of the data points from the median. We find the difference of the median and the mean. We write the formula using '=' sign. The median and data points are put in it by selecting the appropriate cell. The median is made an absolute constant by pressing the F4 key. This is squared by using '^2'. This is multiplied to the frequency using '*'. The result is found for all the dat...

How To: Prepare for a clean isntallation of Windows XP

This video demonstrates how to reformat a hard drive and perform a clean installation of Windows XP operating system. The tutor first advises to make a back up of everything, including the drivers and my folders. He explains various methods by which one can take the backup of the data in a system. Now he shows how to format the C drive where you can now install Windows. He also shows software that is used to take the backup of important data before formatting. This video shows how to reformat...

How To: Encrypt data w/o admin rights using Rohos Mini Drive

This technical video will show you all about the Rohos Mini Drive. See how you may work with an encrypted partition on a PC without admin rights using this free portable encryption solution. It securely protects your portable data on any USB device. Portable utility Rohos Disk Browser gives you opportunity to work with your sensitive data on a USB drive in the usual way on any PC (even at an internet cafe, where you don’t have admin rights).

How To: Merge spreadsheets in Excel

If you've ever entered a lot of data into an Excel spreadsheet before, then you know that putting together even one spreadsheet is a pain in the butt. So if you are required to place all the data on one spreadsheet onto another spreadsheet, don't slave away for hours copying and pasting.

How To: Set Data Limit Alerts on Google Fi

Google Fi Is a great wireless carrier alternative and can be quite beneficial when used correctly. If you don't require much data, you can easily get away with a $30 or less bill. However, if you wanted to crank out more data during your current billing cycle, there's a setting you should use to keep your data in check.

How To: Learn How to Play the Market with This Data-Driven Trading Bundle

If you're reading this, you're likely a tech-savvy coding pro whose analytical talents are mostly applied to designing apps, cracking passwords, and infiltrating networks — all of which are admirable activities for both aspiring and seasoned white hat hackers. But there are other profitable ways that you can put these types of skills to use, namely in the world of investment and trading.