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Interface or an Abstract Class: which one to use?
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Use an interface when you want to force developers working in your syste<em>mem> (yourself included) to i<em>mem>ple<em>mem>ent a set nu<em>mem>ber of <em>mem>ethods on the classes they'll be building.
Use an abstract class when you want to force developers working in your syste<em>mem> (yourself included) to i<em>mem>ple<em>mem>ent a set nu<em>mem>bers of ...
Why do we need extern “C”{ #include } in C++?
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C and C++ are superficially si<em>mem>ilar, but each co<em>mem>piles into a very different set of code. When you include a header file with a C++ co<em>mem>piler, the co<em>mem>piler is expecting C++ code. If, however, it is a C header, then the co<em>mem>piler expects the data contained i...
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
In <em>mem>ultiple courses, books, and jobs, I have seen text fields defined as VARCHAR(255) as kind of the default for "shortish" text. Is there any good reason that a length of 255 is chosen so often, other than being a nice round nu<em>mem>ber ? Is it a holdout fro<em>mem> so<em>mem>e ti<em>mem>e in the past when there was a go...
Coding in Other (Spoken) Languages
This is so<em>mem>ething I've always wondered, and I can't find any <em>mem>ention of it anywhere online. When a shop fro<em>mem>, say Japan, writes code, would I be able to read it in English? Or do languages, like C, PHP, anything, have Japanese translations that they write?
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How can I add a key/value pair to a JavaScript object?
Here is <em>mem>y object literal:
24 Answers
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JPA : How to convert a native query result set to POJO class collection
I a<em>mem> using JPA in <em>mem>y project.
21 Answers
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How can I get a side-by-side diff when I do “git diff”?
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Although Git has an internal i<em>mem>ple<em>mem>entation of diff, you can set up an external tool instead.
There are two different ways to specify an external diff tool:
setting the GIT_EXTERNAL_DIFF and the GIT_DIFF_OPTS environ<em>mem>ent variables.
configuring the ext...
How to prevent buttons fro<em>mem> sub<em>mem>itting for<em>mem>s
In the following page, with Firefox the re<em>mem>ove button sub<em>mem>its the for<em>mem>, but the add button does not.
17 Answers
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Why doesn't Java support unsigned ints?
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This is fro<em>mem> an interview with Gosling and others, about si<em>mem>plicity:
Gosling: For <em>mem>e as a language designer, which I don't really count <em>mem>yself as these days, what "si<em>mem>ple" really ended up <em>mem>eaning was could I expect J. Rando<em>mem> Develop...
How to convert an enu<em>mem> type variable to a string?
How to <em>mem>ake printf to show the values of variables which are of an enu<em>mem> type? For instance:
33 Answers
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