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Undo a merge by pull request?
...d that it merged in a bunch of commits. So now there are all these commits from this person from days before the merge. How do you undo this?
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How do you return a JSON object from a Java Servlet
...response.setContentType("application/json");
// Get the printwriter object from response to write the required json object to the output stream
PrintWriter out = response.getWriter();
// Assuming your json object is **jsonObject**, perform the following, it will return your json object
out.p...
Extracting the last n characters from a string in R
How can I get the last n characters from a string in R?
Is there a function like SQL's RIGHT?
15 Answers
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What's the best way to generate a UML diagram from Python source code? [closed]
A colleague is looking to generate UML class diagrams from heaps of Python source code.
He's primarily interested in the inheritance relationships, and mildly interested in compositional relationships, and doesn't care much about class attributes that are just Python primitives.
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Creating a byte array from a stream
What is the prefered method for creating a byte array from an input stream?
16 Answers
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What is a columnar database?
...layer to access the columnar data in an easy fashion).
How do they differ from relational databases?
They generally differ from traditional (row-oriented) databases with regards to ...
performance...
storage requirements ...
ease of modification of the schema ...
...in specific use cases of DBM...
Why does range(start, end) not include end?
...with x and end with y-1. If the programmer wants a for-loop with i ranging from 1 to 3, he has to explicitly add 1. Is this really about convenience?
– armin
Jul 24 '16 at 14:42
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Generate a random date between two other dates
..., e.g. milliseconds, seconds, hours, days, whatever), subtract the earlier from the later, multiply your random number (assuming it is distributed in the range [0, 1]) with that difference, and add again to the earlier one. Convert the timestamp back to date string and you have a random time in tha...
How are parameters sent in an HTTP POST request?
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NOTE: the body is separated from the header by just one blank line.
– Gab是好人
May 2 '16 at 15:15
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Get the latest record from mongodb collection
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Yet another way of getting the last item from a MongoDB Collection (don't mind about the examples):
> db.collection.find().sort({'_id':-1}).limit(1)
Normal Projection
> db.Sports.find()
{ "_id" : ObjectId("5bfb5f82dea65504b456ab12"), "Type" : "NFL", "Head"...