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Why are these numbers not equal?
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General (language agnostic) reason
Since not all numbers can be represented exactly in IEEE floating point arithmetic (the standard that almost all computers use to represent decimal numbers and do math with them), you will not always get what you expected. This is espe...
How to find all the subclasses of a class given its name?
I need a working approach of getting all classes that are inherited from a base class in Python.
10 Answers
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Command to collapse all sections of code?
In Visual Studio is there a command to collapse/expand all the sections of code in a file?
20 Answers
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delete_all vs destroy_all?
...any tables. I want to delete this user and every record that has his ID in all tables.
4 Answers
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What is the difference between UNION and UNION ALL?
What is the difference between UNION and UNION ALL ?
26 Answers
26
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Push local Git repo to new remote including all branches and tags
...rs).
My local repo has a few branches and tags, and I would like to keep all of my history.
14 Answers
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Send response to all clients except sender
To send something to all clients, you use:
10 Answers
10
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How to determine if one array contains all elements of another array
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Perhaps this is easier to read:
a2.all? { |e| a1.include?(e) }
You can also use array intersection:
(a1 & a2).size == a1.size
Note that size is used here just for speed, you can also do (slower):
(a1 & a2) == a1
But I guess the first is more re...
Iterator invalidation rules
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C++17 (All references are from the final working draft of CPP17 - n4659)
Insertion
Sequence Containers
vector: The functions insert, emplace_back, emplace, push_back cause reallocation if the new size is greater than the old capa...
Give all the permissions to a user on a DB
I would like to give an user all the permissions on a database without making it an admin.
The reason why I want to do that is that at the moment DEV and PROD are different DBs on the same cluster so I don't want a user to be able to change production objects but it must be able to change objects on...