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Apache Cordova API Cookbook Print Copies
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Comment Spam
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First Arduino Project
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Silly CAPTCHA
   

I was registering for access to the Sencha forums (www.sencha.com) today when I saw the following on the registration form:

Figure 1

That's pretty advanced math for a CAPTCHA, isn't it?

So, is the math problem this:

6 – (2 x 3)

Or is it this:

(6 – 2 ) x 3

Having a degree in Physics and more than 30 years of experience as a professional software developer, I was certain I knew what I was doing. However, I'd be lying if I told you I got this right on the first try.

All of my years of experience with math told me that the actual problem I was trying to solve was this: 6 – (2 x 3). Everything I knew from high school and college told me that without parenthesis clarifying the problem, the more complicated math happened first followed by less complicated. Even Wikipedia confirmed this here: http://en.wikipedia.org/wiki/Order_of_operations.

The answer's Zero, right?

Nope, that's not the case. So, not only is the registration forum asking me to do more complicated math than simple addition, subtraction or multiplication – but it's also scoffing at normal precedence of operators and essentially forcing me to give the deliberately wrong answer which, according to them, is 12.



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http://www.johnwargo.com/index.php/Miscellaneous/silly-captcha.html
Feb 08, 2012
73 hits



Recent Blog Posts
89


Apache Cordova API Cookbook Print Copies
Sun, Jul 13th 2014 7:12a   John Wargo
Print copies of Apache Cordova API Cookbook arrived on Friday; my expectation is that they will be available for shipment from Amazon.com and other retailers by the end of next week. This book, along with my Apache Cordova 3 Programming, provide 600 pages of coverage for Apache Cordova. These two books give mobile developers everything they need to be able to write cross-platform mobile applications using Apache Cordova or Adobe PhoneGap. [read] Keywords: applications mobile
112


Apache Cordova API Cookbook Kindle Edition
Fri, Jul 11th 2014 3:11p   John Wargo
I was poking around on Amazon yesterday and noticed that the Kindle edition of Apache Cordova API Cookbook was published back in June. You can get your copy immediately using the following link: http://www.amazon.com/gp/product/B00LB6X2SO/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00LB6X2SO&linkCode=as2&tag=mcnsof-20&linkId=AXKNHCPITM4FNLNK. [read] Keywords:
146


PhoneGap Essentials Sales
Thu, Jul 3rd 2014 7:11a   John Wargo
I keep hearing from readers who have just started reading my PhoneGap Essentials book. That book was published more than two years ago and PhoneGap has changed dramatically since then. The code in the book should still work - not much has changed on the API side of things. The content covered in the first half of the book however is no longer valid. I rewrote the first half of PhoneGap Essentials last year and released it as Apache Cordova 3 Programming in December. That book takes the first [read] Keywords: development
144


Comment Spam
Mon, Jun 30th 2014 6:10a   John Wargo
I mentioned this on twitter a while back, but I’m consistently amazed by how much effort is made by hackers to hack into my personal web sites. I’d be really interested in seeing what percentage of internet traffic is taken up by these efforts. I plan on doing some analysis of this, but simply haven’t gotten to it. Anyway, I had some issues with the CAPTCHA on this site, and my comments plugin provider isn’t responding to any forum posts on the topic so I had to just leave the comments [read] Keywords: bug twitter
295


First Arduino Project
Sat, Mar 15th 2014 8:11p   John Wargo
My dad was a tool geek, I’m a gadget geek. All my life I’ve been drawn toward technology. When I was a kid, I was constantly biking to Radio Shack to pick up one of their assemble-it-yourself electronics kits. I build radios, sound generators and anything I could get my hands on. I wanted to be an Electrical Engineer, but my grades weren’t good enough, so I went into Physics and Computers – go figure. Anyway, my son’s a gadget geek as well. He’s 10, so all he knows is smartphones an [read] Keywords: application gadget
393


Password Pain Redux
Tue, Feb 11th 2014 7:11a   John Wargo
In my previous post, I wrote about one of my biggest software pet peeves – registration forms that have specific password requirements that are not communicated to the user until AFTER a password has been entered. This morning I found one that was even worse than the Google Coder one I showed earlier. I was playing around with the Intel XDK development tools for web applications. After I got it installed, it prompted me to create an account. I filled in all of the fields and went looking for [read] Keywords: applications development google password




415


Password Pain
Tue, Feb 4th 2014 7:12a   John Wargo
I recently learned about a cool web development server for the Raspberry Pi. I want to teach my son about computer programming and this seemed like an interesting way to do it. The server is called Google Coder and it’s delivered as a Raspbian image for the Pi. Pretty cool; I’m hoping to learn more about it and write a bit about my findings here. As I set it up and started playing with it, I was hit by one of my pet peeves. First you fire up the server then connect to it via your desktop br [read] Keywords: desktop development google password server
389


BlackBerry 10 Charging Foibles
Mon, Feb 3rd 2014 9:11p   John Wargo
If you’ve been reading around here you should know that I love BlackBerry, but BlackBerry 10 is really starting to annoy me. For all of BlackBerry’s focus on quality and design, I’m find BlackBerry 10 to be really, really hard to use on a day to day basis. So many of the things I loved about BlackBerry just aren’t in BlackBerry 10 and I’m finding the UX to be…klunky. I went out of town this weekend to hang out with some friends. I have a BlackBerry Z30 device, and it has a HUGE batt [read] Keywords: blackberry
456


Airplane Etiquette
Sun, Feb 2nd 2014 4:10p   John Wargo
I spent the weekend in Buffalo snowmobiling with some very old friends. As I flew on several Southwest airlines flights I was reminded of a little piece of airplane etiquette that most people don’t think/know of. Imagine you get on the plane and sit towards the front of the plane, but get on later in the process and the front overhead compartments are full. You move back to an open overhead compartment further and store your stuff then head up to your seat for the ride to wherever you are goi [read] Keywords:
281


Git
Mon, Jan 20th 2014 6:13p   John Wargo
Linus Torvalds created a distributed revision control and source code management system called git: http://en.wikipedia.org/wiki/Git_(software). Git is pronounced like ‘get’, substituting an ‘i’ for the ‘e’ in get. The open source world has embraced it in a big way and it’s how you install most anything related to Apache Cordova. Git is also an English slang word for ‘a silly, incompetent, stupid, annoying, senile elderly or childish person’: http://en.wikipedia.org/wiki/Git_( [read] Keywords: application python wiki




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