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What is the purpose of setting a key in data.table?
I am using data.table and there are many functions which require me to set a key (e.g. X[Y] ). As such, I wish to understand what a key does in order to properly set keys in my data tables.
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Get all git commits since last tag
When I'm going to tag a commit, I need to know what changed since the last tagged commit. Eg:
2 Answers
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How to detect Ctrl+V, Ctrl+C using JavaScript?
How to detect ctrl + v , ctrl + c using Javascript?
17 Answers
17
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How to store int[] array in application Settings
I'm creating a simple windows Forms application using C# express 2008. I'm an experienced C++ developer, but I am pretty much brand new to C# and .NET.
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Why should we NOT use sys.setdefaultencoding(“utf-8”) in a py script?
I have seen few py scripts which use this at the top of the script. In what cases one should use it?
4 Answers
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How to use ConcurrentLinkedQueue?
How do I use a ConcurrentLinkedQueue in Java?
Using this LinkedQueue , do I need to be worried about concurrency in the queue? Or do I just have to define two methods (one to retrive elements from the list and another to add elements to the list)?
Note: obviously these two methods have to be ...
CSS Input Type Selectors - Possible to have an “or” or “not” syntax?
If they exist in programming),
2 Answers
2
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Copying files from Docker container to host
I'm thinking of using Docker to build my dependencies on a Continuous Integration (CI) server, so that I don't have to install all the runtimes and libraries on the agents themselves.
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How do I check if a string contains another string in Swift?
In Objective-C the code to check for a substring in an NSString is:
27 Answers
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How do I get a distinct, ordered list of names from a DataTable using LINQ?
...e with a Name column. I want to generate a collection of the unique names ordered alphabetically. The following query ignores the order by clause.
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