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Cartesian product of x and y array points into single array of 2D points

... A canonical cartesian_product (almost) There are many approaches to this problem with different properties. Some are faster than others, and some are more general-purpose. After a lot of testing and tweaking, I've found that the following functi...
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What is the Java string pool and how is “s” different from new String(“s”)? [duplicate]

... a reference to an instance of class String, and is derived from a CONSTANT_String_info structure (§4.4.3) in the binary representation of a class or interface. The CONSTANT_String_info structure gives the sequence of Unicode code points constituting the string literal. The Java programming la...
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Function for Factorial in Python

...The concept used here is called recursion ( en.wikipedia.org/wiki/Recursion_(computer_science) ) - a function calling itself is perfectly fine and often useful. – schnaader Nov 7 '14 at 10:06 ...
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Principles for Modeling CouchDB Documents

...s built out of array keys. Using your example above, we can output the post_id, then the type of thing we're referencing, then its ID (if needed). If we then output the id of the referenced document into an object in the value that's returned we can use the 'include_docs' query param to include thos...
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JavaScript chop/slice/trim off last character in string

...to conditionally remove the last four characters, only if they are exactly _bar: var re = /_bar$/; s.replace(re, ""); share | improve this answer | follow | ...
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PHP Function Comments

...peat How many times something interesting should happen * * @throws Some_Exception_Class If something interesting cannot happen * @author Monkey Coder <mcoder@facebook.com> * @return Status */ Classes: /** * Short description for class * * Long description for class (if any)... *...
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WARN Could not determine content-length of response body. Set content-length of the response or set

...d of Webrick, and the warn will disappear. – fearless_fool Aug 3 '12 at 3:55 2 I second using thi...
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Rails 4 multiple image or file upload using carrierwave

... from a file selection window using Rails 4 and CarrierWave? I have a post_controller and post_attachments model. How can I do this? ...
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How to create a density plot in matplotlib?

... Sven has shown how to use the class gaussian_kde from Scipy, but you will notice that it doesn't look quite like what you generated with R. This is because gaussian_kde tries to infer the bandwidth automatically. You can play with the bandwidth in a way by changing the...
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PhoneGap: Detect if running on desktop browser

... steps (it involves a slight change on native code): Create a file called __phonegap_index.html, with the source: <!-- __phonegap_index.html --> <script type="text/javascript"> function isPhoneGap() { //the function's content is as described above } //ensure the 98...