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What is SaaS, PaaS and IaaS? With examples
...d MapReduce), it is not from Google. It is an Apache project. You can find more here. It is just a distributed computing platform and does not fall into any of these service models, IMHO.
Microsoft's Windows Azure is again an example of IaaS.
As far as popularity of these services is concerned, th...
Why does Java allow us to compile a class with a name different than the file name?
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The rationale is to allow more than one top-level class per .java file.
Many classes—such as event listeners—are of local use only and the earliest versions of Java did not support nested classes. Without this relaxation of the "filename = class ...
What is the difference between Cloud, Grid and Cluster? [closed]
...puters connected by a local area network (LAN), whereas cloud and grid are more wide scale and can be geographically distributed. Another way to put it is to say that a cluster is tightly coupled, whereas a Grid or a cloud is loosely coupled. Also, clusters are made up of machines with similar hardw...
Mutable vs immutable objects
...e able to look at a piece of code and easily understand what it does. But more important than that, you should be able to convince yourself that it does what it does correctly. When objects can change independently across different code "domains", it sometimes becomes difficult to keep track of wh...
How can I find non-ASCII characters in MySQL?
...i and non-ascii characters. The answer below from zende checks for one or more non-ascii characters. This helped me for the most part SELECT * FROM tbl WHERE colname NOT REGEXP '^[A-Za-z0-9\.,@&\(\) \-]*$';
– Frank Forte
Oct 16 '15 at 21:00
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Storing sex (gender) in database
...nly supports two possible genders which is inadequate. While INT supports more than two options, it takes 4 bytes -- performance will be better with a smaller/more narrow data type.
CHAR(1) has the edge over TinyINT - both take the same number of bytes, but CHAR provides a more narrow number of ...
Renaming files in a folder to sequential numbers
...ncluded in the answer and note should be rewritten accordingly. that'll be more safe. :(
– KrIsHnA
Apr 7 '17 at 6:11
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asp.net mvc put controllers into a separate project
...ntrollerFactory());
Update: Read this post and the posts it links to for more info. See also Phil Haack's comment on that post about:
ControllerBuilder.Current.DefaultNamespaces.Add(
"ExternalAssembly.Controllers");
...which is not a complete solution, but possibly good enough for simple ca...
What is the difference between Normalize.css and Reset CSS?
...up or sub "just work" after including normalize.css (and are actually made more robust) whereas they are visually indistinguishable from normal text after including reset.css. So, normalize.css does not impose a visual starting point (homogeny) upon you. This may not be to everyone's taste. The best...
Explanation of JSONB introduced by PostgreSQL
...esentation
There are 3 major consequences of this:
jsonb usually takes more disk space to store than json (sometimes not)
jsonb takes more time to build from its input representation than json
json operations take significantly more time than jsonb (& parsing also needs to be done each time ...