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Difference between `set`, `setq`, and `setf` in Common Lisp?
What is the difference between "set", "setq", and "setf" in Common Lisp?
6 Answers
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Image comparison - fast algorithm
I'm looking to create a base table of images and then compare any new images against that to determine if the new image is an exact (or close) duplicate of the base.
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What's the simplest way to subtract a month from a date in Python?
If only timedelta had a month argument in it's constructor. So what's the simplest way to do this?
20 Answers
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How does an underscore in front of a variable in a cocoa objective-c class work?
I've seen in a few iPhone examples that attributes have used an underscore _ in front of the variable. Does anyone know what this means? Or how it works?
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Data access object (DAO) in Java
I was going through a document and I came across a term called DAO . I found out that it is a Data Access Object. Can someone please explain me what this actually is?
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Convert a list to a data frame
I have a nested list of data. Its length is 132 and each item is a list of length 20. Is there a quick way to convert this structure into a data frame that has 132 rows and 20 columns of data?
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Bash Templating: How to build configuration files from templates with Bash?
I'm writing a script to automate creating configuration files for Apache and PHP for my own webserver. I don't want to use any GUIs like CPanel or ISPConfig.
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Converting file size in bytes to human-readable string
I'm using this function to convert a file size in bytes to a human-readable file size:
19 Answers
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Singleton pattern in nodejs - is it needed?
I recently came across this article on how to write a singleton in Node.js. I know the documentation of require states that:
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How to pass parameters correctly?
I am a C++ beginner but not a programming beginner.
I'm trying to learn C++(c++11) and it's kinda unclear for me the most important thing: passing parameters.
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