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Is R's apply family more than syntactic sugar?
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The apply functions in R don't provide improved performance over other looping functions (e.g. for). One exception to this is lapply which can be a little faster because it does more work in C code than in R (see this question for an example of this...
Convert JSON String To C# Object
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Sorry, but this code sample does not work. DeserializeObject gives an exception. Use var routes_list = serializer.Deserialize<Test>("{\"test\":\"some data\"}"); instead. Also, you don't need get/setTest( ), and String test, should be public. This ...
Identify duplicates in a List
...od add of Set returns a boolean whether a value already exists (true if it does not exist, false if it already exists, see Set documentation).
So just iterate through all the values:
public Set<Integer> findDuplicates(List<Integer> listContainingDuplicates)
{
final Set<Integer>...
Automatically import modules when entering the python or ipython interpreter
...umpy as np almost every single time I fire up the python interpreter. How do I set up the python or ipython interpreter so that numpy is automatically imported?
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Format date in a specific timezone
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@haemse utcOffset() has nothing to do with DST or time zone rules. It just looks at the moment you've already constructed and gets/sets the number of minutes from UTC. Use the Moment Timezone library with a named timezone ("America/Phoenix") if you want to han...
best way to preserve numpy arrays on disk
...on of a array with shape (2000 * 2000) will take about 1 ~ 2s to complete. Do you have any suggestion on improving the performance? thx.
– Simon. Li
Mar 28 '17 at 9:48
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What does the PHP error message “Notice: Use of undefined constant” mean?
...ooking for constants called department, name, email, message, etc. When it doesn't find such a constant, PHP (bizarrely) interprets it as a string ('department', etc). Obviously, this can easily break if you do defined such a constant later (though it's bad style to have lower-case constants).
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How to have favicon / icon set when bookmarklet dragged to toolbar?
...ser (a globe and a star, respectively). My site has a favicon, and the window, tab and even [site] bookmark uses the favicon I've specified. Just not my bookmarklet.
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How can I have lowercase routes in ASP.NET MVC?
...ex", id = UrlParameter.Optional }
);
}
Also assuming you are doing this for SEO reasons you want to redirect incoming urls to lowercase (as said in many of the links off this article).
protected void Application_BeginRequest(object sender, EventArgs e)
{
//You don't want to redirect...
Rails 3: Get Random Record
So, I've found several examples for finding a random record in Rails 2 -- the preferred method seems to be:
14 Answers
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