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Array versus List: When to use which?
...y, that you would want to use an array. Definitely use a List<T> any time you want to add/remove data, since resizing arrays is expensive. If you know the data is fixed length, and you want to micro-optimise for some very specific reason (after benchmarking), then an array may be useful.
List...
How do I fetch a single model in Backbone?
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This is good, but sometimes you don't want to reinstantiate the model. If you want to fetch a specific item against the same model, you can do a silent set: currentBook.set('id', 13423, {silent:true}). This works too, but I'm not sure why: current...
What exactly is a Maven Snapshot and why do we need it?
..."SNAPSHOT" term means that the build is a snapshot of your code at a given time.
It usually means that this version is still under heavy development.
When the code is ready and it is time to release it, you will want to change the version listed in the POM. Then instead of having a "SNAPSHOT" you ...
Java 8 Distinct by property
...viously, and that returns whether the given element was seen for the first time:
public static <T> Predicate<T> distinctByKey(Function<? super T, ?> keyExtractor) {
Set<Object> seen = ConcurrentHashMap.newKeySet();
return t -> seen.add(keyExtractor.apply(t));
}
...
SQL: IF clause within WHERE clause
... will stop processing the line and continue on. That saves you processing time. Also, always put the more costly statement on the other side of your boolean check.
– Steve
Dec 17 '10 at 19:12
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Detect rotation of Android phone in the browser with JavaScript
...tation + window.orientation) % 180) return; However, without additional setTimeout trickery, you will only benefit from this on iOS, where a swift 180-degree rotation only creates a single orientationchange event.
– mklement0
Dec 10 '12 at 15:04
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Emacs in Windows
... You should probably get version 22.2 (the latest).
If this is your first time, I hope you enjoy it! I know I absolutely love emacs!
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What does Expression.Quote() do that Expression.Constant() can’t already do?
...onstant when the quoted expression tree is reified as a delegate by the runtime compiler. There was a good reason why I wrote the code that way which I do not recall at this exact moment, but it does have the nasty side effect of introducing closure over values of outer parameters rather than closur...
Nullable type issue with ?: Conditional Operator
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This question has been asked a bunch of times already. The compiler is telling you that it doesn't know how convert null into a DateTime.
The solution is simple:
DateTime? foo;
foo = true ? (DateTime?)null : new DateTime(0);
Note that Nullable<DateTime> c...
Changing user agent on urllib2.urlopen
...ese should work in theory, but (with Python 2.7.2 on Windows at least) any time you send a custom User-agent header, urllib2 doesn't send that header. If you don't try to send a User-agent header, it sends the default Python / urllib2
None of these methods seem to work for adding User-agent but t...