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Change key pair for ec2 instance
...f:
/home/ec2-user/.ssh/authorized_keys
/home/ubuntu/.ssh/authorized_keys
/root/.ssh/authorized_keys
After editing an authorized_keys file, always use a different terminal to confirm that you are able to ssh in to the instance before you disconnect from the session you are using to edit the file. ...
Autoincrement VersionCode with gradle extra properties
...')) {
output.outputFile = new File(getProject().getRootDir(), "${fileNaming}-${versionMajor}.${versionMinor}.${versionPatch}-${outputFile.name}")
}
}
}
}
} else {
throw new GradleException("Could not read ve...
Get generated id after insert
...
I had quite a bit of problems with this on mySQL, the LAST_INSERT_ID is not reliable way to get the ID, if you have users hammering the database, the ID returned may not be the ID that was inserted by the query you have run, several other users might impact on the ret...
Is it bad to have my virtualenv directory inside my git repository?
...
If you, say pip install mysql-python, on a 64 bit machine, and then someone with a 32 bit machine tries to use it, it will not work. It uses a C module, like many Python modules do, to increase performance. I imagine Windows->Linux would also not...
What is the difference between synchronous and asynchronous programming (in node.js)
...f the sql driver you use. The driver should spawn a new thread, connect to mysql and run the query. Once done, post the result to the event queue, and Node will call the callback.
– Salvatorelab
Oct 21 '13 at 7:36
...
JPA EntityManager: Why use persist() over merge()?
...ttached, entityToSave);
return attached;
}
Although if connected to MySQL merge() could be as efficient as persist() using a call to INSERT with ON DUPLICATE KEY UPDATE option, JPA is a very high level programming and you can't assume this is going to be the case everywhere.
...
Quicksort vs heapsort
...y left child has a value greater than its sibling;
Recursively extract the root of the heap, sift down the lacune left by the root until it reaches a leaf of the heap, then fill the lacune with an appropriate element took from the other part of the array;
Recur over the remaining non-ordered part of...
How to link Docker services across hosts?
...is taken from the blog post:
$ docker run -d -P -e constraint:storage=ssd mysql
One of the supported constraints is "node" that allows you pin a container to a specific hostname. The swarm also resolves links across nodes.
In my testing I got the impression that Swarm doesn't yet work with volum...
Detect iPad Mini in HTML5
...a width of 1 inch, then get the width in pixels. That should resolve your root problem.
– JohnLBevan
Nov 14 '12 at 13:28
...
Are PHP short tags acceptable to use?
...not use any of the other features that might not be supported on a server? MYSQL vs MYSQLI? You will waste your time little by little, again and again writing long tags just to avoid a tiny chance of spending a little time to change to a better host.
– Dean Or
...