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Create the perfect JPA entity [closed]
...was architecturally enforced from the beginning. By design our persistence API does not offer a public way to interact with the business objects, only an API to interact with our persistence layer using DTOs.
– Edwin Dalorzo
May 18 '11 at 15:11
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Which characters make a URL invalid?
...ISyntaxException in the Java java.net.URI constructor so a URL like http://api.google.com/q?exp=a|b is not allowed and must be encoded instead as http://api.google.com/q?exp=a%7Cb if using Java with a URI object instance.
sh...
Regular expression for floating point numbers
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TL;DR
Use [.] instead of \. and [0-9] instead of \d to avoid escaping issues in some languages (like Java).
Thanks to the nameless one for originally recognizing this.
One relatively simple pattern for matching a floating point number is
[+-]?([0-9]*[.])?[0-9]+
This will match:
12...
JSON and XML comparison [closed]
...f XML at all even if its death
is gleefully celebrated by a cadre of web API designers.
And I can’t resist tucking an "I told you so!" token away in my
desk. I look forward to seeing what the JSON folks do when they are
asked to develop richer APIs. When they want to exchange less well
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What are the relative strengths and weaknesses of Git, Mercurial, and Bazaar? [closed]
...Mercurial is written in C (core, for performance) and Python, and provides API for extensions; Bazaar is written in Python, and provides API for extensions.
In considering each of them with one another and against version control systems like SVN and Perforce, what issues should be considered?
V...
Domain Driven Design: Domain Service, Application Service
...ot make it an application service. An application service is your domain's API. What if you wanted to reveal your domain to someone else writing an app, what will they use? Application Services, and they may not need caching so your caching impl is useless to them (ie.why it's infrastructure)
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What is an EJB, and what does it do?
...inciples are the same. Spring took ideas from EJBs and vice-versa. But the API, implementation, way to deploy, and some features are different.
– JB Nizet
Feb 22 '15 at 11:32
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What Makes a Good Unit Test? [closed]
...e classes from a third-party vendor, especially the one supplying the core APIs of the framework you code in. E.g., don't test adding an item to the vendor's Hashtable class.
Consider using a code coverage tool such as NCover to help discover edge cases you have yet to test.
Try writing the test bef...
Difference between a Postback and a Callback
... just ECMASCRIPT circus tricks ASP.NET stores in what they call their AJAX API in gigantic JavaScript libraries your browser downloads from the server, and which ASP.NET developers unknowingly pack into their web pages to trigger changes in a web page without full POSTBACK. The ASP.NET API for AJAX ...
How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throw
...e content by UploadedFile#getContents(). This will return null when native API is used instead of Apache Commons FileUpload. You need to use UploadedFile#getInputStream() instead. See also How to insert uploaded image from p:fileUpload as BLOB in MySQL?
Another potential problem with native API wil...