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How to define custom configuration variables in rails
...HENTICATION constant everywhere in your application:
#rails c production
:001> AUTHENTICATION['username'] => 'aa'
then add passwords.yml to .gitignore: echo /config/passwords.yml >> .gitignore, create an example file for your comfort cp /config/passwords.yml /config/passwords.example.y...
How to echo with different colors in the Windows command line
...;[92m [92mGreen[0m
echo ^<ESC^>[93m [93mYellow[0m
echo ^<ESC^>[94m [94mBlue[0m
echo ^<ESC^>[95m [95mMagenta[0m
echo ^<ESC^>[96m [96mCyan[0m
echo ^<ESC^>[97m [97mWhite[0m
echo.
echo [101;93m STRONG BACKGROUND COLORS [0m
echo ^<ESC^>[100m [100mBlack[0m
echo ^<ESC...
Get week of year in JavaScript like in PHP
... Also, doesn't this technically not advance the week until 0:00:00.001? Better to use Math.floor?
– Hafthor
Feb 17 '16 at 16:20
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How does Rails keep track of which migrations have run for a database?
...leading digits don't have to be a timestamp, you could call your migration 001_blah.rb. Earlier versions of Rails used this format, and used sequential numbering for newly generated migrations. Later versions have switched to timestamps to help prevent multiple developers from independently generati...
How can I pad an int with leading zeros when using cout
...to output an int with leading zeros, so the value 1 would be printed as 001 and the value 25 printed as 025 . How can I do this?
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Compare double to zero using epsilon
... greater than 1:
1.0000 00000000 00000000 00000000 00000000 00000000 00000001 × 2^0 = 1 + 2^-52
Therefore:
epsilon = (1 + 2^-52) - 1 = 2^-52
Are there any numbers between 0 and epsilon? Plenty... E.g. the minimal positive representable (normal) number is:
1.0000 00000000 00000000 00000000 00...
List comprehension rebinds names even after scope of comprehension. Is this right?
...4, 85: 85, 86: 86, 87: 87, 88: 88, 89: 89, 90: 90, 91: 91, 92: 92, 93: 93, 94: 94, 95: 95, 96: 96, 97: 97, 98: 98, 99: 99}
>>> x
9
However it has been fixed in 3 as noted above.
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What is the apply function in Scala?
...ered Aug 17 '17 at 19:38
sdinesh94sdinesh94
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Truncate Two decimal places without rounding
....AreEqual(-1.12m, -1.1254m.TruncateEx(2));
Assert.AreEqual(0m, 0.0001m.TruncateEx(3));
Assert.AreEqual(0m, -0.0001m.TruncateEx(3));
Assert.AreEqual(0m, -0.0000m.TruncateEx(3));
Assert.AreEqual(0m, 0.0000m.TruncateEx(3));
Assert.AreEqual(1.1m, 1.12m. Truncate...