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Run cron job only if it isn't already running
...job to periodically restart it... I'm not sure how possible this is, but I read through a couple of cron tutorials and couldn't find anything that would do what I'm looking for...
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Using emit vs calling a signal as if it's a regular function in Qt
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Emit is not "just decoration". emit tells the person reading the call that magic is about to happen (i.e. this is going to trigger code in objects this class potentially never heard of, and these calls might be synchronous or asynchronous), which is essentially totally lost if ...
Linux command to list all available commands and aliases
...ash built-in, not a separate command with its own man page. You'll need to read the bash(1) man page, or run help compgen at a bash command line.
– camh
Aug 23 '17 at 20:48
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Git in Powershell saying 'Could not find ssh-agent'
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For those looking for a detailed explanation have a read of this blog post. Below is a quote from the blog post. Ultimately the ssh-agent.exe needs to be in the path, or resolved some other way.
EDIT:
It appears most of the people don't bother reading the linked blog and the o...
Styling HTML email for Gmail
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As others have said, some email programs will not read the css styles. If you already have a web email written up you can use the following tool from zurb to inline all of your styles:
http://zurb.com/ink/inliner.php
This comes in extremely handy when using templates like...
How to establish a connection pool in JDBC?
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Don't reinvent the wheel.
Try one of the readily available 3rd party components:
Apache DBCP - This one is
used internally by Tomcat, and by
yours truly.
c3p0
Apache DBCP comes with different example on how to setup a pooling javax.sql.DataSource. Here is one s...
Optimising Android application before release [closed]
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Read this blogpost. medium.com/@hammad_tariq/…
– Developine
Jun 30 '17 at 5:00
add a comment
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What Makes a Good Unit Test? [closed]
...ake longer to figure out which change was the culprit.
Update 2010-08:
Readable : This can be considered part of Professional - however it can't be stressed enough. An acid test would be to find someone who isn't part of your team and asking him/her to figure out the behavior under test within a...
SQL Data Reader - handling Null column values
I'm using a SQLdatareader to build POCOs from a database. The code works except when it encounters a null value in the database. For example, if the FirstName column in the database contains a null value, an exception is thrown.
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How do I use floating-point division in bash?
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True, but awk is generally more likely to be already installed in the system.
– CMCDragonkai
Jun 26 '14 at 6:57
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