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Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
Why do Scala and frameworks like Spark and Scalding have both reduce and foldLeft ? So then what's the difference between reduce and fold ?
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Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
...ary iostreams, I get met with a wave of disbelief. Yet I have profiler results showing large amounts of time spent in iostream library code (full compiler optimizations), and switching from iostreams to OS-specific I/O APIs and custom buffer management does give an order of magnitude improvement.
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What's the best way to communicate between view controllers?
... cocoa, and iPhone dev in general, I have a strong desire to get the most out of the language and the frameworks.
4 Answers...
test a file upload using rspec - rails
I want to test a file upload in rails, but am not sure how to do this.
6 Answers
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How to limit setAccessible to only “legitimate” uses?
The more I learned about the power of java.lang.reflect.AccessibleObject.setAccessible , the more astonished I am at what it can do. This is adapted from my answer to the question ( Using reflection to change static final File.separatorChar for unit testing ).
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Restore a postgres backup file using the command line?
I'm new to postgresql, and locally, I use pgadmin3. On the remote server, however, I have no such luxury.
24 Answers
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HTML5 Video Dimensions
...ideo of which I'm overlaying onto a page with JavaScript, however it is returning the dimensions of the poster image instead of the actual video as it seems it's being calculated before the video is loaded.
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What is causing this ActiveRecord::ReadOnlyRecord error?
This follows this prior question, which was answered. I actually discovered I could remove a join from that query, so now the working query is
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Why does base64 encoding require padding if the input length is not divisible by 3?
What is the purpose of padding in base64 encoding. The following is the extract from wikipedia:
3 Answers
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What are the differences between concepts and template constraints?
I want to know what are the semantic differences between the C++ full concepts proposal and template constraints (for instance, constraints as appeared in Dlang or the new concepts-lite proposal for C++1y ).
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