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What's a concise way to check that environment variables are set in a Unix shell script?
...tive, exits. Otherwise, the value of parameter is substituted.
The Colon Command
I should probably add that the colon command simply has its arguments evaluated and then succeeds. It is the original shell comment notation (before '#' to end of line). For a long time, Bourne shell scripts had a c...
How to fix committing to the wrong Git branch?
I just made a perfectly good commit to the wrong branch.
How do I undo the last commit in my master branch and then take those same changes and get them into my upgrade branch?
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How to calculate the sentence similarity using word2vec model of gensim with python
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This is actually a pretty challenging problem that you are asking. Computing sentence similarity requires building a grammatical model of the sentence, understanding equivalent structures (e.g. "he walked to the store yesterday" and "yesterday, he walked to the store"), finding similarity no...
Which would be better for concurrent tasks on node.js? Fibers? Web-workers? or Threads?
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Node has a completely different paradigm and once it is correctly captured, it is easier to see this different way of solving problems. You never need multiple threads in a Node application(1) because you have a different way of doing t...
How to determine the memory footprint (size) of a variable?
... work properly.
Other Profiler Options
php-memory-profiler
https://github.com/arnaud-lb/php-memory-profiler. This is what I've done on my Ubuntu server to enable it:
sudo apt-get install libjudy-dev libjudydebian1
sudo pecl install memprof
echo "extension=memprof.so" > /etc/php5/mods-available/m...
How to check if AlarmManager already has an alarm set?
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Following up on the comment ron posted, here is the detailed solution. Let's say you have registered a repeating alarm with a pending intent like this:
Intent intent = new Intent("com.my.package.MY_UNIQUE_ACTION");
PendingIntent pendingIntent ...
git status shows modifications, git checkout — doesn't remove them
...aviour:
Line ending normalization
I've had these kinds of problems too. It comes down to git automatically converting crlf to lf. This is typically caused by mixed line endings in a single file. The file gets normalized in the index, but when git then denormalizes it again to diff it against the fil...
Making a UITableView scroll when text field is selected
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community wiki
Sam Ho
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How to get ID of the last updated row in MySQL?
...LECT @uids;
This will return a string with all the IDs concatenated by a comma.
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How to fix the flickering in User controls
...ms cp = base.CreateParams;
cp.ExStyle |= 0x02000000; // Turn on WS_EX_COMPOSITED
return cp;
}
}
There are many things you can do to improve painting speed, to the point that the flicker isn't noticeable anymore. Start by tackling the BackgroundImage. They can be really expensive when...