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how do I check in bash whether a file was created more than x time ago?
...date -r /the/file +%s to find its age.
You can also do touch --date '2015-10-10 9:55' /tmp/file to get extremely fine-grained time on an arbitrary date/time.
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Animate change of view controllers without using navigation controller stack, subviews or modal cont
...I called TransitionController. You can find it at https://gist.github.com/1394947.
As an aside, I prefer the implementation in a separate class b/c it's easier to reuse. If you don't want that, you could simply implement the same logic directly in your app delegate eliminating the need for the Tran...
How do I compute derivative using Numpy?
...y I can think of is using numpy's gradient function:
x = numpy.linspace(0,10,1000)
dx = x[1]-x[0]
y = x**2 + 1
dydx = numpy.gradient(y, dx)
This way, dydx will be computed using central differences and will have the same length as y, unlike numpy.diff, which uses forward differences and will retu...
NSDate get year/month/day
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Christian Schnorr
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answered Sep 12 '10 at 15:37
Itai FerberItai ...
Convert INT to VARCHAR SQL
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Use the convert function.
SELECT CONVERT(varchar(10), field_name) FROM table_name
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Include constant in string without concatenating
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answered Feb 4 '10 at 23:15
PekkaPekka
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Visual Studio immediate window command for Clear All
...e lists all predefined aliases and you can define your own, too. (For VS 2010 and earlier, custom aliases are described in a separate article, though.) Scanning through, there's a whole slew of them, some of which might even have their roots in MS-DOS DEBUG.EXE (specifically >d, >g, >p, >...
#ifdef #ifndef in Java
...flag1 = true;
boolean flag2 = false;
int j=0;
for(int i=0;i<1000000000;i++){
if(flag1)
if(flag2)
j++;
else
j++;
else
if(flag2)
j++;
else
j++;
}
runs ab...
Initial bytes incorrect after Java AES/CBC decryption
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Split a string by another string in C#
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