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Live!
More than usual, I have been absent from LJ lately (among other things). Now I finally have something to show for it!
Behold!
Together with Jon, Des, and a wide variety of other friends, acquaintances, and people who perform services for money, we built an iPhone app that schedules town cars, together with a corresponding website, backend, and ( Read more... ) -
Google Maps, iPhone, and the antimeridian
I've been writing a bit of mapping code recently, and found that (at least parts of) the Google Maps API doesn't support the antimeridian (i.e., 180 degrees west/east ( Read more... ) -
Project Euler in Haskell, Problem 4:
I just finished problem 4:
A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91*99.
Find the largest palindrome made from the product of two 3-digit numbers.
And this is the solution:
( Read more... ) -
Project Euler in Haskell, Problems 3 and 7:
I just finished problems 3 and 7:
The prime factors of 13195 are 5, 7, 13 and 29.
What is the largest prime factor of the number 600851475143?
By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13.
What is the 10001st prime number?
And this is the solution:
( Read more... ) -
Project Euler in Haskell, Problem 5:
I just finished another of the Project Euler problems. This is problem 5:
2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.
What is the smallest number that is evenly divisible by all of the numbers from 1 to 20?
And this is the solution:
( Read more... ) -
Project Euler in Haskell, Problem 2:
I've started teaching myself Haskell by going through the Project Euler problems. This is problem 2:
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be ( Read more... ) -
Attention to Detail
On the iPhone, there is a standard control that lets you select a date. On that control, it is impossible to select any date in the year 1582. 1581 is fine, and so is 1583, but 1582 does not show up.
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You have to check your pointers after all
A while back I heard an interesting rumor: In some configurations, a call to malloc() will never return NULL. If you ask for more memory than there is space for, the kernel (or the runtime) will give you a pointer anyways, and hope that you'll never use it, or at least free some other memory before you do. If by the time you use it, there still isn ( Read more... ) -
Wiretapping
This makes me sad ( Read more... ) -
Apple and my data
I just installed Max OS X Leopard for the first time. It requires my name, address and phone number to install. The only way around it is to lie. That's ridiculous! I would like to see the firestorm of protests that would happen if Microsoft pulled something like that.