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How to efficiently build a tree from a flat structure?
I have a bunch of objects in a flat structure. These objects have an ID and a ParentID property so they can be arranged in trees. They are in no particular order.
Each ParentID property does not necessarily matches with an ID in the structure. Therefore their could be several trees emerging ...
Different ways of loading a file as an InputStream
What's the difference between:
6 Answers
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How to do an update + join in PostgreSQL?
Basically, I want to do this:
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How to replace an entire line in a text file by line number
I have a situation where I want a bash script to replace an entire line in a file.
The line number is always the same, so that can be a hard-coded variable.
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Insert picture/table in R Markdown [closed]
So I want to insert a table AND a picture into R Markdown. In regular word document I can just easily insert a table (5 rows by 2 columns), and for the picture just copy and paste.
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Missing return statement in a non-void method compiles
I encountered a situation where a non-void method is missing a return statement and the code still compiles.
I know that the statements after the while loop are unreachable (dead code) and would never be executed. But why doesn't the compiler even warn about returning something? Or why would a...
Python name mangling
In other languages, a general guideline that helps produce better code is always make everything as hidden as possible. If in doubt about whether a variable should be private or protected, it's better to go with private.
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How to make a class JSON serializable
How to make a Python class serializable?
33 Answers
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Algorithms based on number base systems? [closed]
I've noticed recently that there are a great many algorithms out there based in part or in whole on clever uses of numbers in creative bases. For example:
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