Dale Dietrich
friedman: always supply your comparative advantage
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Category — development

Fine Tip–Tip Calculator

Categories: developmentiPhonelifemobile apps
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Buy in the iTunes App Store – $0.99

I’m delighted to announce that the Apple App Store accepted my first iPhone app, Fine Tip – Tip Calculator, on my first try. You can use Fine Tip to quickly calculate your next restaurant bill’s tip and grand total. It’s fast and easy to use. Take a look at the demo/tutorial:

Fine Tip, Tip Calculator Tutorial

Features:

  • image_thumb5Fast, Elegant, Accurate, Full-Featured, Yet Easy to Use
  • All Controls on One Screen
  • Calculate Tip Based on Subtotal or Total: Calculate the appropriate tip on either the pre-tax subtotal amount (shown in image on right) or the after tax bill total.
  • Easily Adjust Tip Amount: As you slide the ‘Tip %’ slider up and down, the tip and grand total amounts adjust on the fly.
  • Round the Tip: Make it easy for the server to receive their tip. Use the + / – buttons to successively round the tip amount up or down in 25 cent increments (eg: to $12,00, $12.25, $12.50 etc.). The grand total (Total + Tip) amount and effective tip rate indicator adjust on the fly.
  • Round the Grand Total: Alternatively round the grand total (Total + Tip) amount up or down in 25 cent increments. In the example to the right, down to $100.00 even or, say, up to $101.00 even). The tip amount and effective tip rate indicator adjust on the fly.
  • Split the Bill: Use the ‘Split’ slider to split the bill between multiple parties and the applicable per person tip and grand total (Total + Tip) amounts will be shown.
  • Personalized Multi-party Tipping: Pass Fine Tip around to other people in your party so they can bump their personal tip or grand total amounts up or down as they choose.
  • CONTINUE READING →

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    Eric Schmidt’s Definition of Web 3.0

    Categories: cloud computingdevelopmentgeekinteractive mediamobilepc industrysocial networkingsoftwareweb apps
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    Eric Schmidt is the CEO of Google. In the 2 minute video below he describes what he believes Web 3.0 applications will be.

     

    In summary, he defines, Web 3.0 as:

    • Applications that are pieced together.
    • They are relatively small.
    • The data is in the cloud.
    • The application can run on any device, PC or mobile phone.
    • Applications are fast and customizable
    • Applications are distributed virally via social networks and email.

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    How to Upgrade to Apache 2.2.10 with Windows XP

    Categories: bloggingdevelopmenthow-tosmall officeutilitieswindows xp
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    apache http server logo For weeks now I have had a persistent problem with my wishhh.com service. It was taking an inordinate amount of time to connect to the service (sometimes as much as 2 minutes or more). After ruling out every possible issue, I decided to upgrade my Apache server to the latest release (version 2.2.10). I’m delighted that the upgrade solved my problem.

    I had installed Apache server three years also and made only a few changes to its configuration files since. Being a bit rusty, I searched for an online ‘how-to’ upgrade guide. The only guide I found was Evaria.com’s upgrade tutorial here. It was helpful but a little bit for my tastes. I followed that tutorial and took notes along the way. This post fleshes out the details a bit further.

    Note: This post describes my upgrade from Apache version 2.0.54 to the latest version 2.2.10 (as of December 1, 2008). If you are upgrading from a different version, you’ll need to make adjustments to the instructions below to reflect your specific circumstance. If needed, you can view my server specs at the end of this post for.

    Before you Begin

    • Gather Your Info: Information on the latest version of Apache HTTP Server can be found  here
    • Download the Package: Before de-installing your current version, be sure have the latest version at the ready. You can download it from one of the mirror sites linked into here.  I downloaded this ‘Win32 Binary without crypto (no mod_ssl)’ .msi installation file was: 

            apache_2.2.10-win32-x86-no_ssl.msi

    • Upgrade Info: Basic upgrade information can be found here. Unfortunately, I could not find step-by-step upgrade instructions on the apache.org site -  hence this post.

    CONTINUE READING →

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    iPhone App Development – Where to Start

    Categories: developmentiPhonemac
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    iPhone App Development - Harder Than You'd Think

    [October 4, 2012 Update]

    On September 27, 2012, Apple accepted my first app, Fine Tip – Tip Calculator (buy it here, read about it here) into the app store. For reasons I won’t get into, I abandoned iPhone app development back in the fall of 2009. In August 2012, I took up the torch again. Within one month I was able to complete my first app.

    Much has changed in three years. While most of what I wrote below still stands, ignore the book recommendations below. Instead, I strongly urge you to buy the two books below. Had they existed three years ago, I would have been able to develop my first app much quicker. I purchased them in August 2012 and had my first app done in less than a month:

    [End October 4, 2012 Update]

    [Original Post Last Updated: April 2009]

    How hard could it be, I asked myself. I’ve developed my own applications in Basic and C. I can configure an Apache Server, install and use PHP, MySQL and other server apps. I develop and maintain websites and blogs from my home server. Over the last 15 years I’ve taught myself HTML, PHP, MySQL, CSS and the basics of Java. How hard could it be to develop a small application for the iPhone?

    Let’s step back for a moment.

    I have a very particular program in mind that I’ve wanted for years. It’s a very simple program – perfect for the iPhone (more on that in future posts). I could whip it up in C or PHP in about a day. I’ve never owned, or even used, an Apple computer of any kind in my some 27ish years of computing. I regard the iPhone App Store as a revolutionary new idea that pries control of mobile device apps from the big-bad telco giants and puts it in the hands of average consumers and developers — where it belongs. I see cloud computing as a very important part of our collective computing future. I want to get in on the ground floor. If my first simple program works out, I want to develop an iPhone app to work with my wishhh.com service. After that, who knows.

    So, in August 2008 I registered to to join Apple’s standard developer programpurchased a Mac Mini (subsequently replaced it with an iMac) and set out to develop my first portable application for use on the iPhone.

    Minimum Hardware

    To develop for the iPhone you will need an Intel-based Mac running Leopard (OS X 10.5.3 or later). Any Mac released since 2006, laptop or desktop, should work.

    Piece of Cake for Mac Cocoa Developers

    If you have a solid grounding in Cocoa development (Apple’s Objective-C framework) with the xCode development on the Mac platform, developing iPhone Apps should be a breeze. Not so much for the rest of us.

    Learning Curve for the Rest of Us

    Below is a discussion of the  hurdles I have had to overcome and the online resources I’ve found useful in my bid to become the newest iPhone App developer:

    CONTINUE READING →

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    I Traded-Up to an iMac

    Categories: developmentmacsmall office
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    iMac with Leopard and iPhone SDK

    I took advantage of the Apple Store’s 14 day return policy and traded up to a 20" iMac ($1,299 Cdn).  I returned the Mac Mini that I purchased two weeks ago.

    I’m using the Mac as an iPhone App development platform. The Mac Mini just wasn’t quite enough for my needs.

    Extended Desktop

    Mac Mini with Red XThe Mac Mini was gorgeous on, and took full advantage of, the 1920 x 1200 screen resolution of one of my 24" Dell monitors. But, you cannot extend the Leopard desktop to a a second monitor with a Mac Mini.

    [Update March 3, 2009: The new Mac Mini that came out in the beginning of March 2009 supports dual monitor setups with a Mini DVI port and Mini DisplayPort on the back.  With this change it now makes the Mac Mini more suitable for iPhone development. Here are the full new Mac Mini specs.]

    I am used to having my Vista desktop extended across four monitors. Having just one monitor on the Mac Mini (even a 24" monitor) was just too small for comfortable application development.

    You can extend the iMac desktop to a second monitor and that’s exactly what I’m doing. The iMac has a mini-DVI port on the back for this purpose. I purchased a mini-DVI to VGA dongle and extended the iMac desktop to my second Dell 24" monitor (I switch that monitor back and forth between my iMac and my Dell XPS PC as needed – its my furthest right Dell monitor and to the left of my iMac). For now my XPS Vista machine is plugged into that 24" Dell monitor’s DVI input.

    CONTINUE READING →

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    Purchased a Mac Mini for iPhone App Development

    Categories: developmentmacos xsmall office
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    Mac mini

    Hell has officially frozen over. After 28 years of PC ownership, I purchased my first Apple computer yesterday – a mac mini.

    I’d like to try my hand at developing iPhone Apps for the App Store. The SDK only works on the Apple platform (no SDK for you, PC developers). The big challenge for me won’t be the iPhone SDK so much as figuring out how to use a Mac. I’ve never spent more than a few frustrating minutes with the platform.

    The Mac Mini Decision

    Originally I was going to purchase an iMac hoping that I could use it in my growing array of PC monitors (ie: use its screen to switch back and forth between the iMac and just another screen in my array of PC screens). But, there’s no VGA, DVI or any other video input on the thing.

    After an hour or so on the iPhone Developer site on my own and then another half hour with an Apple Store rep, we determined that the Mac Mini must be able to run the iPhone App SDK. Hence, as the cheapest way to go I decided that the Mac Mini was the best bet. After all, I have no intention to use the thing for anything other than Apple App development. And if it doesn’t meet my needs I have 14 days to return it.

    I was a bit surprised that the Mac Mini doesn’t even come with a keyboard or a mouse. The Mac Mini was $649. The two extra peripherals were $49 each. And it cost me $99 fee to join the iPhone Developer Program. For $846 plus tax, I’m off.

    CONTINUE READING →

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