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Combine two data frames by rows (rbind) when they have different sets of columns
Is it possible to row bind two data frames that don't have the same set of columns? I am hoping to retain the columns that do not match after the bind.
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Async/Await vs Threads
In .Net 4.5 Microsoft has added the new Async/Await feature to simplify asynchronous coding. However, I wonder
3 Answers...
Google Chrome form autofill and its yellow background
I have design problem with Google Chrome and its form autofill function.
If Chrome remembers some login/password it changes a background color to a yellow one.
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Dynamic LINQ OrderBy on IEnumerable / IQueryable
...found an example in the VS2008 Examples for Dynamic LINQ that allows you to use a sql-like string (e.g. OrderBy("Name, Age DESC")) for ordering. Unfortunately, the method included only works on IQueryable<T> . Is there any way to get this functionality on IEnumerable<T> ?
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How does node.bcrypt.js compare hashed and plaintext passwords without the salt?
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The salt is incorporated into the hash (as plaintext). The compare function simply pulls the salt out of the hash and then uses it to hash the password and perform the comparison.
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Cause CMAKE to generate an error
How can I get CMAKE to generate an error on a particular condition. That is, I want something like this:
1 Answer
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Are the decimal places in a CSS width respected?
...es, it is respected. As Martin pointed out, things break down when you get to fractional pixels, but if your percentage values yield integer pixel value (e.g. 50.5% of 200px in the example) you'll get sensible, expected behaviour.
Edit: I've updated the example to show what happens to fractional pi...
How do I enable C++11 in gcc?
....1 from http://hpc.sourceforge.net on Mac OSX Mountain Lion. I am trying to compile a C++ program which uses the to_string function in <string> . I need to use the flag -std=c++11 every time:
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Loop through each row of a range in Excel
...gs that I'm sure there's a built-in function for (and I may well have been told it in the past), but I'm scratching my head to remember it.
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How do I determine if a port is open on a Windows server? [closed]
I'm trying to install a site under an alternative port on a server, but the port may be closed by a firewall. Is there a way to ping out or in, on a specific port, to see if it is open?
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