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Sample random rows in dataframe

... sample_frac) have been superseded by slice_sample, though they remain for now. – Matt_B Sep 4 at 2:50 add a comment  |  ...
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How to work offline with TFS

Our TFS server has some temporary connectivity issues right now, and as such VS has gone unresponsive, leaving 50+ developers unable to work! ...
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The breakpoint will not currently be hit. No symbols have been loaded for this document in a Silverl

... as default browser (will only affect Visual Studio's choice of browser) Now, Visual Studio will launch IE when running the .Web project and attach to the correct process. That should do it. share | ...
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How to get only time from date-time C# [closed]

... Try this: TimeSpan TodayTime = DateTime.Now.TimeOfDay; share | improve this answer | follow | ...
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Why does the order of the loops affect performance when iterating over a 2D array?

... x[1][0] etc... Meaning that you're hitting them all in order. Now look at the 1st version. You're doing: x[0][0] x[1][0] x[2][0] x[0][1] x[1][...
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What is std::string::c_str() lifetime?

...use the strings are not modified while in that scope. (However, we don't know what use_foo() or ~Foo() might be doing with those values; if they copy the strings elsewhere, then they should do a true copy, and not just copy the char pointers.) ...
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How to shrink the .git folder

...ant to add the "-f" flag (which is the "drop all old deltas", since you now are actually trying to make sure that this one actually finds good candidates. source: http://gcc.gnu.org/ml/gcc/2007-12/msg00165.html Will this get rid of binary data that is orphaned in my repo? "git repack" will ...
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What is the difference between google tag manager and google analytics?

... they used, which pages were the most popular, etc. The only way it can know this stuff is if you put a "tag" on all of your pages. The tag is the javascript code on your pages that runs on the visitor's browser, which tells Google Analytics' servers that they are visiting the page right now. Th...
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Why is a combiner needed for reduce method that converts type in java 8

...s processed by its own thread in the sequential fashion I described above. Now, if we have N threads, we have N intermediate results. These need to be reduced down to one result. Since each intermediate result is of type T, and we have several, we can use the same accumulator function to reduce thos...
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How can I find the number of days between two Date objects in Ruby?

...conds, such as this example 2.0.0-p195 :017 > a_date_time = DateTime.now => #<DateTime: 2013-12-31T12:23:03-08:00 ((2456658j,73383s,725757000n),-28800s,2299161j)> 2.0.0-p195 :018 > b_date_time = DateTime.now-20 => #<DateTime: 2013-12-11T12:23:06-08:00 ((2456638j,73386s,699...