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What is a plain English explanation of “Big O” notation?
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N² → (2N)² = 4(N²)
... I double-cubed (octuple) the time an O(N³) ("cubic time") algorithm takes." (e.g. a problem 100x as big takes 100³=1000000x as long... very unsustainable)
cN³ → c(2N)³ = 8(cN³)
... I add a fixed amount to the time an O(log(N)) ("logarithmic time") al...
How can I update NodeJS and NPM to the next versions?
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npm update npm -g didn't work for me on windows - it completed without output but npm remained the same version (1.3.11 when the most rece...
JavaScript file upload size validation
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Using jquery:
<form action="upload" enctype="multipart/form-data" method="post">
U...
Node.js throws “btoa is not defined” error
...yB3w7NybGQhIQ==. If you decode this in a browser it will give you Hélló wórld!!. The binary is perfect to ensure cross platform compatibility.
– Iván Alegre
Jun 24 '19 at 8:02
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How many files can I put in a directory?
...ld answer, I know… but when you write EXT4 – Maximum number of files: 2³² - 1 (4,294,967,295) and Maximum number of files per directory: unlimited you really confused me because 2³² - 1 != “unlimited”. I guess I need a coffee now. ;) Nevertheless +1
– e-sushi
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Difference between single and double square brackets in Bash
...d1 && cmd2
[ a = a -a b = b ]: equivalent, but deprecated by POSIX³
[ a = a ] && [ b = b ]: POSIX and reliable equivalent
(
[[ (a = a || a = b) && a = b ]]: false
[ ( a = a ) ]: syntax error, () is interpreted as a subshell
[ \( a = a -o a = b \) -a a = b ]: equivalent, ...
In C# check that filename is *possibly* valid (not that it exists) [duplicate]
... edited Apr 30 '17 at 0:51
buræquete
12.5k44 gold badges3131 silver badges6262 bronze badges
answered Jan 7 '09 at 21:11
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What is the difference between encode/decode?
...n as encoding. Use u'...'.encode(encoding).
Example:
>>> u'æøå'.encode('utf8')
'\xc3\x83\xc2\xa6\xc3\x83\xc2\xb8\xc3\x83\xc2\xa5'
>>> u'æøå'.encode('latin1')
'\xc3\xa6\xc3\xb8\xc3\xa5'
>>> u'æøå'.encode('ascii')
UnicodeEncodeError: 'asci...
Adjusting the Xcode iPhone simulator scale and size [duplicate]
...answered Sep 4 '13 at 6:39
kumar123kumar123
73166 silver badges2121 bronze badges
Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
...d1 && cmd2
[ a = a -a b = b ]: equivalent, but deprecated by POSIX³
[ a = a ] && [ b = b ]: POSIX and reliable equivalent
(
[[ (a = a || a = b) && a = b ]]: false
[ ( a = a ) ]: syntax error, () is interpreted as a subshell
[ \( a = a -o a = b \) -a a = b ]: equivalent, ...