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Determine the data types of a data frame's columns

...st few values of each variable): str(my.data) 'data.frame': 5 obs. of 4 variables: $ y : num 1.03 1.599 -0.818 0.872 -2.682 $ x1: int 1 2 3 4 5 $ x2: logi TRUE TRUE FALSE FALSE FALSE $ X3: Factor w/ 5 levels "a","b","c","d",..: 1 2 3 4 5 @Gavin Simpson's approach is also streamlined, but p...
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How to compare strings ignoring the case

...| edited May 16 '12 at 18:42 Marc-André Lafortune 70.6k1414 gold badges150150 silver badges162162 bronze badges ...
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Rails 4 - Strong Parameters - Nested Objects

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Code for decoding/encoding a modified base64 URL

I want to base64 encode data to put it in a URL and then decode it within my HttpHandler. 5 Answers ...
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How do I set a ViewModel on a window in XAML using DataContext property?

... | edited Mar 3 '18 at 4:38 Scott Weaver 5,87922 gold badges2121 silver badges3333 bronze badges answ...
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How can I switch to a tag/branch in hg?

... | edited Oct 18 '14 at 17:56 anatoly techtonik 16.3k88 gold badges102102 silver badges124124 bronze badges ...
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How is Generic Covariance & Contra-variance Implemented in C# 4.0?

I didn't attend PDC 2008, but I heard some news that C# 4.0 is announced to support Generic covariance and contra-variance. That is, List<string> can be assigned to List<object> . How could that be? ...
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Regex to remove all (non numeric OR period)

I need for text like "joe ($3,004.50)" to be filtered down to 3004.50 but am terrible at regex and can't find a suitable solution. So only numbers and periods should stay - everything else filtered. I use C# and VS.net 2008 framework 3.5 ...
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How to concatenate strings with padding in sqlite

...'ve used is to start with your target string, say '0000', concatenate '0000423', then substr(result, -4, 4) for '0423'. Update: Looks like there is no native implementation of "lpad" or "rpad" in SQLite, but you can follow along (basically what I proposed) here: http://verysimple.com/2010/01/12/sql...
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where is gacutil.exe?

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