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Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
...ave taken Problem #12 from Project Euler as a programming exercise and to compare my (surely not optimal) implementations in C, Python, Erlang and Haskell. In order to get some higher execution times, I search for the first triangle number with more than 1000 divisors instead of 500 as stated in...
How to send password securely over HTTP?
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...and "But I have to pay for an SSL certificate!!" is not a valid complaint, since you can get them for $30 these days. Is your data really not worth 30 bucks to protect?
– caf
Oct 18 '09 at 2:08
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How to monitor network calls made from iOS Simulator
I am trying to monitor calls from an app to my server just like Firebug does.
I could not find a way to see that in iOS Simulator or in xCode.
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Check number of arguments passed to a Bash script
I would like my Bash script to print an error message if the required argument count is not met.
10 Answers
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Why am I getting tree conflicts in Subversion?
I had a feature branch of my trunk and was merging changes from my trunk into my branch periodically and everything was working fine. Today I went to merge the branch back down into the trunk and any of the files that were added to my trunk after the creation of my branch were flagged as a "tree con...
Why can tuples contain mutable items?
...s inside them are mutable. The only thing that makes an object mutable is to have a method that alters its data. In general, there is no way to detect this.
Another insight is that Python's containers don't actually contain anything. Instead, they keep references to other objects. Likewise, Pyt...
A variable modified inside a while loop is not remembered
In the following program, if I set the variable $foo to the value 1 inside the first if statement, it works in the sense that its value is remembered after the if statement. However, when I set the same variable to the value 2 inside an if which is inside a while statement, it's forgotten af...
The simplest way to resize an UIImage?
In my iPhone app, I take a picture with the camera, then I want to resize it to 290*390 pixels. I was using this method to resize the image :
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C++ : why bool is 8 bits long?
... the bool type is 8 bits long (on my system), where only one bit is enough to hold the boolean value ?
6 Answers
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How can you do anything useful without mutable state?
... one thing I just can't wrap my head around is stateless coding. It seems to me that simplifying programming by removing mutable state is like "simplifying" a car by removing the dashboard: the finished product may be simpler, but good luck making it interact with end-users.
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