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How to avoid overflow in expr. A * B - C * D
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120
This seems too trivial I guess.
But A*B is the one that could overflow.
You could do the follo...
~x + ~y == ~(x + y) is always false?
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237
Assume for the sake of contradiction that there exists some x and some y (mod 2n) such that
~...
Combining two lists and removing duplicates, without removing duplicates in original list
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172
You need to append to the first list those elements of the second list that aren't in the first ...
How to update Python?
I have version 2.7 installed from early 2012. I can't find any consensus on whether I should completely uninstall and wipe this version before putting on the latest version.
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Difference between break and continue statement
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21 Answers
21
Active
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List comprehension: Returning two (or more) items for each item
Is it possible to return 2 (or more) items for each item in a list comprehension?
6 Answers
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Cartesian product of multiple arrays in JavaScript
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2020 Update: 1-line (!) answer with vanilla JS
Original 2017 Answer: 2-line answer with vanilla JS:
(see updates below)
All of the answers here are overly complicated, most of them take 20 lines of code or even more.
This exa...
Version of Apache installed on a Debian machine
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Try apachectl -V:
$ apachectl -V
Server version: Apache/2.2.9 (Unix)
Server built: Sep 18 2008 21:54:05
Server's Module Magic Number: 20051115:15
Server loaded: APR 1.2.7, APR-Util 1.2.7
Compiled using: APR 1.2.7, APR-Util 1.2.7
... etc ...
If it does not work for you, run th...
How to join two sets in one line without using “|”
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320
You can use union method for sets: set.union(other_set)
Note that it returns a new set i.e it ...