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Unit testing code with a file system dependency
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There's really nothing wrong with this, it's just a question of whether you call it a unit test or an integration test. You just have to make sure that if you do interact with the file system, there are no unintended side effects. Sp...
What does 'foo' really mean?
...ifies as a programming question, as in any programming tutorial, you eventually come across 'foo' in the code examples. (yeah, right?)
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Why there is no ConcurrentHashSet against ConcurrentHashMap
... Collections.newSetFromMap creates a SetFromMap. e.g. the SetFromMap.removeAll method delegates to the KeySetView.removeAll, that inherits from ConcurrentHashMap$CollectionView.removeAll. This method is highly inefficient in bulk removing elements. imagine removeAll(Collections.emptySet()) traverses...
Returning a boolean from a Bash function
...ode 0 = everything went ok = 0 errors; error code 1 = the main thing this call was supposed to do failed; else: fail! look it up in the manpage.
– flying sheep
Mar 3 '14 at 19:51
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Eclipse hangs at the Android SDK Content Loader
...rkspace\.metadata\.plugins\org.eclipse.core.resources\.projects and delete all the projects in there.
Note: You are not going to lose your projects
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Java Class.cast() vs. cast operator
...ject) isn't special to the compiler. It could be optimized when used statically (i.e. Foo.class.cast(o) rather than cls.cast(o)) but I've never seen anybody using it - which makes the effort of building this optimization into the compiler somewhat worthless.
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Backing beans (@ManagedBean) or CDI Beans (@Named)?
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CDI is preferred over plain JSF because CDI allows for JavaEE-wide dependency injection. You can also inject POJOs and let them be managed. With JSF you can only inject a subset of what you can with CDI.
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Casting to string in JavaScript
... searched for those three options in the jQuery source code, and they are all in use .
I would like to know if there are any differences between them:
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How do I set up DNS for an apex domain (no www) pointing to a Heroku app?
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(Note: root, base, apex domains are all the same thing. Using interchangeably for google-foo.)
Traditionally, to point your apex domain you'd use an A record pointing to your server's IP. This solution doesn't scale and isn't viable for a cloud platform like H...
What is the purpose of the '@' symbol in CSS?
...ructs. The @ syntax itself, though, as I mentioned, is not new.
These are all known in CSS as at-rules. They're special instructions for the browser, not directly related to styling of (X)HTML/XML elements in Web documents using rules and properties, although they do play important roles in control...