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Python: using a recursive algorithm as a generator
Recently I wrote a function to generate certain sequences with nontrivial constraints. The problem came with a natural recursive solution. Now it happens that, even for relatively small input, the sequences are several thousands, thus I would prefer to use my algorithm as a generator instead of usin...
How to atomically delete keys matching a pattern using Redis
In my Redis DB I have a number of prefix:<numeric_id> hashes.
23 Answers
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Numpy how to iterate over columns of array?
Suppose I have and m x n array. I want to pass each column of this array to a function to perform some operation on the entire column. How do I iterate over the columns of the array?
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C++ Tuple vs Struct
Is there is any difference between using a std::tuple and a data-only struct ?
12 Answers
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Installing Python packages from local file system folder to virtualenv with pip
Is it possible to install packages using pip from the local filesystem?
10 Answers
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Modulo operation with negative numbers
In a C program i was trying the below operations(Just to check the behavior )
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Array initializing in Scala
I'm new to Scala ,just started learning it today.I would like to know how to initialize an array in Scala.
6 Answers
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AutoLayout with hidden UIViews?
I feel like it's a fairly common paradigm to show/hide UIViews , most often UILabels , depending on business logic. My question is, what is the best way using AutoLayout to respond to hidden views as if their frame was 0x0. Here is an example of a dynamic list of 1-3 features.
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urllib2.HTTPError: HTTP Error 403: Forbidden
I am trying to automate download of historic stock data using python. The URL I am trying to open responds with a CSV file, but I am unable to open using urllib2. I have tried changing user agent as specified in few questions earlier, I even tried to accept response cookies, with no luck. Can you pl...
Find the extension of a filename in Ruby
I'm working on the file upload portion of a Rails app. Different types of files are handled differently by the app.
4 Answ...