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How to sum a variable by group
...as "model Frequency by Category" or "Frequency depending on Category". Not all languages use a special operator to define a symbolic function, as done in R here. Perhaps with that "natural-language interpretation" of the tilde operator, it becomes more meaningful (and even intuitive). I personally f...
Can I change all my http:// links to just //?
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I tested it thoroughly before publishing. Of all the browsers available to test against on Browsershots, I could only find one that did not handle the protocol relative URL correctly: an obscure *nix browser called Dillo.
There are two drawbacks I've received feedback ...
How to load local html file into UIWebView
...le into my UIWebView but it won't work. Here's the stage: I have a folder called html_files in my project. Then I created a webView in interface builder and assigned an outlet to it in the viewController. This is the code I'm using to append the html file:
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“using namespace” in c++ headers
In all our c++ courses, all the teachers always put using namespace std; right after the #include s in their .h files. This seems to me to be dangerous since then by including that header in another program I will get the namespace imported into my program, maybe without realizing, intending or...
Delete with Join in MySQL
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Actually you can use an alias for joined tables, but not for the main table (posts). "DELETE posts FROM posts INNER JOIN projects p ON p.project_id = posts.project_id"
– Weboide
May 29 '12 a...
How to deal with “java.lang.OutOfMemoryError: Java heap space” error?
...form you are running on. In Windows 32 bit this is around 2GB (not specifically heap but total amount of memory per process). It just happens that Java chooses to make the default smaller (presumably so that the programmer can't create programs that have runaway memory allocation without running int...
npm ERR cb() never called
... Workaround helped, but for the same error but during module installation (grunt-contrib-yuidoc), thanks.
– Wiseman
Jul 22 '13 at 13:39
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What is the difference between onPause() and onStop() of Android Activites?
...android/app/Activity.html ,
it said 'Activity comes into foreground' will call onPause() , and 'Activity is no longer visible' will call onStop() .
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When to use an assertion and when to use an exception
...andled during development, but not in production (when assertions are typically disabled)?
– herman
Sep 14 '13 at 14:09
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Is there a built-in function to print all the current properties and values of an object?
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You are really mixing together two different things.
Use dir(), vars() or the inspect module to get what you are interested in (I use __builtins__ as an example; you can use any object instead).
>>> l = dir(__builtins__)
>...