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How to generate and validate a software license key?
...eveloping a product (developed in C#) that'll be available for downloading and installing for free but in a very limited version. To get access to all the features the user has to pay a license fee and receive a key. That key will then be entered into the application to "unlock" the full version.
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How to resolve symbolic links in a shell script
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According to the standards, pwd -P should return the path with symlinks resolved.
C function char *getcwd(char *buf, size_t size) from unistd.h should have the same behaviour.
getcwd
pwd
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Need a simple explanation of the inject method
...umulator: the result of each run of the block is stored in the accumulator and then passed to the next execution of the block. In the case of the code shown above, you are defaulting the accumulator, result, to 0. Each run of the block adds the given number to the current total and then stores the r...
rsync: difference between --size-only and --ignore-times
I'm trying to understand what the difference is between two options
4 Answers
4
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How to format time since xxx e.g. “4 minutes ago” similar to Stack Exchange sites
...answered Jul 5 '10 at 7:45
Sky SandersSky Sanders
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Hook up Raspberry Pi via Ethernet to laptop without router? [closed]
...ially recover the Raspberry Pi, it will most likely be in a rural location and I'd like to turn off the Pi at that point safely.
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Given a class, see if instance has method (Ruby)
...don't know why everyone is suggesting you should be using instance_methods and include? when method_defined? does the job.
class Test
def hello; end
end
Test.method_defined? :hello #=> true
NOTE
In case you are coming to Ruby from another OO language OR you think that method_defined means ...
In Java, how do I convert a byte array to a string of hex digits while keeping leading zeros? [dupli
...oach would be to check how many digits are output by Integer.toHexString() and add a leading zero to each byte if needed. Something like this:
public static String toHexString(byte[] bytes) {
StringBuilder hexString = new StringBuilder();
for (int i = 0; i < bytes.length; i++) {
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unit testing of private functions with mocha and node.js
...alled by test code outside the module. That's due to how JavaScript works, and Mocha cannot by itself circumvent this.
In the few instances where I determined that testing a private function is the right thing to do, what I've done is set some environment variable that my module checks to determine...
How do I use a Boolean in Python?
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Actually Python didn't have a boolean type for a long time (as in old C), and some programmers still use integers instead of booleans.
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