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Linear Regression and group by in R
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Inside the function you'd need to test for that case and use a different formula
– hadley
Mar 14 '13 at 15:24
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Convert SVG image to PNG with PHP
...n just place it in a loop and convert loads of SVGs,
import os
svgs = ('test1.svg', 'test2.svg', 'etc.svg')
for svg in svgs:
os.system('java -jar batik-rasterizer.jar -m image/jpeg -q 0.8 '+str(svg)+'.svg')
share
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iOS forces rounded corners and glare on inputs
... FWIW, just had this issue on a project, and the iPad 1 I was testing on also added styles to <button> tags. So I think you're better off solving this with CSS directly.
– neemzy
Dec 9 '13 at 16:12
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Broadcast receiver for checking internet connection in android app
... I am familiar with all of this , but I have doubts. I did some tests and found out that these broadcast receivers detect if your wifi / phone radio goes ON or OFF, or simply, if your device has an IP address. The problem comes when for example my phone is connected to a WiFi access point...
How does a “stack overflow” occur and how do you prevent it?
...her too many times.
Beyond good programming practices, static and dynamic testing, there's not much you can do on these high level systems.
Embedded systems
In the embedded world, especially in high reliability code (automotive, aircraft, space) you do extensive code reviews and checking, but you...
Configuring diff tool with .gitconfig
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cmd = "diffmerge --merge --result=\"$MERGED\" \"$LOCAL\" \"$(if test -f \"$BASE\"; then echo \"$BASE\"; else echo \"$LOCAL\"; fi)\" \"$REMOTE\""
trustExitCode = false
[diff]
tool = diffmerge
[difftool "diffmerge"]
cmd = diffmerge \"$LOCAL\" \"$REMOTE\"
So, you se...
Do asynchronous operations in ASP.NET MVC use a thread from ThreadPool on .NET 4
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So it is very difficult and if you don't feel ready to perform extensive tests on your application, do not implement asynchronous controllers, as chances are that you will do more damage than benefit. Implement them only if you have a reason to do so: for example you have identified that standard ...
Favourite performance tuning tricks [closed]
...d ordered, and a HASH for everything else. Adding a join hint will let you test your theory.
Parameter sniffing. If you ran the stored proc with unrealistic values at first (say, for testing), then the cached query plan may be suboptimal for your production values. Running again WITH RECOMPILE shoul...
calculating the difference in months between two dates
...of the actual dates used, and for months they're important.)
The code and tests are both available on GitHub. The code is very simple:
public static int GetTotalMonthsFrom(this DateTime dt1, DateTime dt2)
{
DateTime earlyDate = (dt1 > dt2) ? dt2.Date : dt1.Date;
DateTime lateDate = (dt1...
Difference between volatile and synchronized in Java
... the many permutations of what could happen, one is that thread-1 does the test for counter==1000 and finds it true and is then suspended. Then thread-2 does the same test and also sees it true and is suspended. Then thread-1 resumes and sets counter to 0. Then thread-2 resumes and again sets counte...