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Design patterns to avoid [closed]
... lead to over-engineered and complex solutions. However it is instead much more interesting for a programmer to read up on design techniques and principles that lay the foundation for most of the patterns. In fact one of my favorite books on 'design patterns' stresses this by reiterating on what pri...
What is the difference between a var and val definition in Scala?
...g the same var for multiple purposes. This has some problems:
It will be more difficult for people reading the code to know what is the value of a variable in a certain part of the code.
You may forget to re-initialize the variable in some code path, and end up passing wrong values downstream in t...
IPN vs PDT in Paypal
...at process is re-used for any subsequent attempts to process it.
Edit
One more thing: IPN carries more information than PDT. There are lots of different messages that you can receive from IPN, such as chargeback notification, etc, and thus you really should implement it.
PayPal's PDT system sen...
Why shouldn't I use mysql_* functions in PHP?
...ql_* functions used to be very popular, but their use is not encouraged anymore. The documentation team is discussing the database security situation, and educating users to move away from the commonly used ext/mysql extension is part of this (check php.internals: deprecating ext/mysql).
And the la...
Found conflicts between different versions of the same dependent assembly that could not be resolved
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How do I find all files containing specific text on Linux?
...somewhere/' -e "pattern"
For directories it's possible to exclude one or more directories using the --exclude-dir parameter. For example, this will exclude the dirs dir1/, dir2/ and all of them matching *.dst/:
grep --exclude-dir={dir1,dir2,*.dst} -rnw '/path/to/somewhere/' -e "pattern"
This wo...
How to get relative path from absolute path
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What difference between Jersey vs jax-rs
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Straight from the jersey site
Jersey framework is more than the JAX-RS Reference Implementation.
Jersey provides its own API that extend the JAX-RS toolkit with
additional features and utilities to further simplify RESTful service
and client development. Jersey also ex...
Functional programming - is immutability expensive? [closed]
...in two parts. The first is conceptual. The next looks at the same question more concretely in Scala.
9 Answers
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Import and Export Excel - What is the best library? [closed]
... the customer is using Excel, then why should they save off a second, much more limited file to interact with your product?
– mlibby
Feb 17 '11 at 15:33
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