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Should I use a data.frame or a matrix?
...ize. To adapt the new version of the function to ggplot(), I converted the now returned matrix to a data.frame to use in ggplot().
After I rerun the code I could not believe the result. The code run in a fraction of a second! Instead of about 12 seconds. And again, the function during the 10,000 i...
jQuery if checkbox is checked
...:checked')) {
// Do something...
alert('You can rock now...');
};
});
});
</script>
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Volatile vs. Interlocked vs. lock
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+1 for ensuring me to forget about lock-free coding from now.
– Xaqron
Jan 3 '11 at 1:51
5
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How do I set cell value to Date and apply default Excel date format?
...ache POI for some time to read existing Excel 2003 files programmatically. Now I have a new requirement to create entire .xls files in-memory (still using Apache POI) and then write them to a file at the end. The only problem standing in my way is the handling of cells with dates.
...
How to securely save username/password (local)?
...e entered user name and password, use the Rfc2898DerivedBytes class (also known as Password Based Key Derivation Function 2 or PBKDF2). This is more secure than using encryption like Triple DES or AES because there is no practical way to go from the result of RFC2898DerivedBytes back to the passwor...
What's the difference between django OneToOneField and ForeignKey?
...the name of the reporter.
In [8]: A1.reporter.first_name
Out[8]: 'Rick'
Now create the Reporter object R2 by running the following python code.
In [9]: R2 = Reporter.objects.create(first_name='Harry')
In [10]: R2.save()
Now try to add R2 to the Article object A1.
In [13]: A1.reporter.add(R2)...
Order discrete x scale by frequency/value
...king a dodged bar chart using ggplot with discrete x scale, the x axis are now arranged in alphabetical order, but I need to rearrange it so that it is ordered by the value of the y-axis (i.e., the tallest bar will be positioned on the left).
...
Verifying a specific parameter with Moq
... multiple times when it wasn't called at all. They might have fixed it by now - but if you see that message you might consider verifying that the method was actually called.
EDIT: Here is an example of calling verify multiple times for those scenarios where you want to verify that you call a funct...
What really is a deque in STL?
...ular vector of capacity 1000 with 100 elements in it at positions 0 to 99. Now when a push_Front happens you just push at the end i.e. at position 999, then 998 etc. until the two ends meet. Then you reallocate (with exponential growth to guarantee amortizet constant times) just like you would do wi...
Meaning of acronym SSO in the context of std::string
...f m_size <= 16, then I will put all of the data in m_sso, so I already know the capacity and I don't need the pointer to the data. If m_size > 16, then I don't need m_sso. There is absolutely no overlap where I need all of them. A smarter solution that wastes no space would look something a li...