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@Resource vs @Autowired
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In spring pre-3.0 it doesn't matter which one.
In spring 3.0 there's support for the standard (JSR-330) annotation @javax.inject.Inject - use it, with a combination of @Qualifier. Note that spring now also supports the @javax.inject.Qualifier meta-annotation:
@Qual...
Java 8 Iterable.forEach() vs foreach loop
...urage hiding side-effects somewhere in expressions? Why encourage unwieldy one-liners? Mixing regular for-each and new forEach willy-nilly is bad style. Code should speak in idioms (patterns that are quick to comprehend due to their repetition), and the fewer idioms are used the clearer the code is ...
Omitting the second expression when using the if-else shorthand
...worried about file size, just create a minified version of it with help of one of the many JS compressors. (e.g Google's Closure Compiler)
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Chrome says “Resource interpreted as script but transferred with MIME type text/plain.”, what gives?
...ude application/x-javascript, as the MIME media types listed above are the ones registered in the standards tree by now (so there is no need, and there should be no want, to use experimental ones anymore). Cf. RFC 4329, "Scripting Media Types" (2005 CE) and my Test Case: Support for Scripting Media...
How can I use pointers in Java?
...eard that Java programs can be created with pointers and that this can be done by the few who are experts in java. Is it true?
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The static keyword and its various uses in C++
The keyword static is one which has several meanings in C++ that I find very confusing and I can never bend my mind around how its actually supposed to work.
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What is the most efficient/elegant way to parse a flat table into a tree?
...tore all paths in the Closure Table, where there is a direct ancestry from one node to another. Include a row for each node to reference itself. For example, using the data set you showed in your question:
INSERT INTO ClosureTable (ancestor_id, descendant_id) VALUES
(1,1), (1,2), (1,4), (1,6),
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Can Flask have optional URL parameters?
...er way is to write
@user.route('/<user_id>', defaults={'username': None})
@user.route('/<user_id>/<username>')
def show(user_id, username):
pass
But I guess that you want to write a single route and mark username as optional? If that's the case, I don't think it's possible....
Python try-else
...if execution falls off the bottom of the try - if there was no exception. Honestly, I've never found a need.
However, Handling Exceptions notes:
The use of the else clause is better
than adding additional code to the try
clause because it avoids accidentally
catching an exception that was...
Merging without whitespace conflicts
... This ignores whitespace at line end, and considers all other sequences of one or more whitespace characters to be equivalent.
--ignore-all-space
Ignore whitespace when comparing lines.
This ignores differences even if one line has whitespace where the other line has none.
ks1322 adds i...