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How to prevent ifelse() from turning Date objects into numeric objects
I am using the function ifelse() to manipulate a date vector. I expected the result to be of class Date , and was surprised to get a numeric vector instead. Here is an example:
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How do I use WebRequest to access an SSL encrypted site using https?
I'm writing a program that reads content from a user provided URL. My problem is in the code that goes something like this:
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What is “overhead”?
I am a student in Computer Science and I am hearing the word "overhead" a lot when it comes to programs and sorts. What does this mean exactly?
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Equivalent to 'app.config' for a library (DLL)
Is there an equivalent to app.config for libraries (DLLs)? If not, what is the easiest way to store configuration settings that are specific to a library? Please consider that the library might be used in different applications.
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Order by multiple columns with Doctrine
I need to order data by two columns (when the rows have different values for column number 1, order by it; otherwise, order by column number 2)
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What is the difference between a static and a non-static initialization code block
My question is about one particular usage of static keyword. It is possible to use static keyword to cover a code block within a class which does not belong to any function. For example following code compiles:
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How to make a class property? [duplicate]
In python I can add a method to a class with the @classmethod decorator. Is there a similar decorator to add a property to a class? I can better show what I'm talking about.
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Convert numpy array to tuple
Note: This is asking for the reverse of the usual tuple-to-array conversion.
5 Answers
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What's the Point of Multiple Redis Databases?
So, I've come to a place where I wanted to segment the data I store in redis into separate databases as I sometimes need to make use of the keys command on one specific kind of data, and wanted to separate it to make that faster.
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How long is the SHA256 hash?
I'm going to run SHA256 on a password + salt, but I don't know how long to make my VARCHAR when setting up the MySQL database. What is a good length?
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