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SQL - using alias in Group By

... Caution that using alias in the Group By (for services that support it, such as postgres) can have unintended results. For example, if you create an alias that already exists in the inner statement, the Group By will chose the inner field name. -- Working example in pos...
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Differences between action and actionListener

...FORE the action Long Answer: A business action typically invokes an EJB service and if necessary also sets the final result and/or navigates to a different view if that is not what you are doing an actionListener is more appropriate i.e. for when the user interacts with the components, such as h:...
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Transaction isolation levels relation with locks on table

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What is the purpose of setting a key in data.table?

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How to integrate nodeJS + Socket.IO and PHP?

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How can I ssh directly to a particular directory?

...on a remote machine, which can be very useful, e.g. when implementing menu services. Multiple -t options force tty allocation, even if ssh has no local tty. If you don't use -t then no prompt will appear. If you don't add ; bash then the connection will get closed and return control to your...
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When to use LinkedList over ArrayList in Java?

...been doing operational performance engineering on very large scale SOA web services for about a decade, I would prefer the behavior of LinkedList over ArrayList. While the steady-state throughput of LinkedList is worse and therefore might lead to buying more hardware -- the behavior of ArrayList un...
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How do I reformat HTML code using Sublime Text 2?

...ome settings to tweak formatting Cons: Requires PHP (falls back to web service) ST2 only Abandoned? HTMLBeautify Pros: Supports ST2/ST3 Simple and no binaray dependencies Support for OS X, Win and Linux Cons: Chokes a bit with inline comments Does expand minimized/compressed code HTM...
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How do you configure Django for simple development and deployment?

...also be wise to keep this in a separate repository... better yet, a secure service that serves this information from a canonical source (probably overkill for most)... so that new host doesn't require a new release. – DylanYoung Dec 13 '17 at 14:58 ...
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Markdown and image alignment

...s is a beautiful hack, necessary for solving a problem for certain hosting services. The poster who gave this beautiful hack is gone now and instead the community is left with crybabies. – Aaron Robinson Feb 8 '14 at 4:37 ...