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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...
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
...
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
...
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
..."]
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...
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...
What is the maximum depth of the java call stack?
...
I tested on my system and didn't find any constant value, sometimes stack overflow occurs after 8900 calls, sometimes only after 7700, random numbers.
public class MainClass {
private static long depth=0L;
public sta...
What is difference between cacerts and keystore?
...enets, unless you commit the mistake of using self-signed certificates for test servers: a mistake because it means you're using different code paths in test and in production.
– Marquis of Lorne
Oct 26 '15 at 22:21
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