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When should I use Lazy?
...ar interpolation (or a bilinear interpolation) which is fairly trivial but does have some cost. (Are you going to suggest that I go and do my own experiment?)
– Ben
Jan 31 '14 at 16:59
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Rails: How does the respond_to block work?
...byonrails.org/v4.1/classes/ActionController/Responder.html
The Responder does NOT contain a method for .html or .json, but we call these methods anyways! This part threw me for a loop.
Ruby has a feature called method_missing. If you call a method that doesn't exist (like json or html), Ruby calls...
Python: Get relative path from comparing two absolute paths
...o perform some normalization first (this is useful in situations where one does not know whether they always end with '/' or not, or if some of the paths are relative). Relevant functions include os.path.abspath() and os.path.normpath().
PPS: as Peter Briggs mentioned in the comments, the simple a...
How do I make Vim do normal (Bash-like) tab completion for file names?
...completes the whole file name instead of doing the partial match like Bash does. Is there an option to make this file name tab completion work more like Bash?
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Checking if a variable is defined?
...entation). It will return a String with the kind of the item, or nil if it doesn’t exist.
>> a = 1
=> 1
>> defined? a
=> "local-variable"
>> defined? b
=> nil
>> defined? nil
=> "nil"
>> defined? String
=> "constant"
>> defined? 1
=> "ex...
How to make IPython notebook matplotlib plot inline
...learning to using iPython (and Python programming instead of Matlab); what does import matplotlib' do versus import matplotlib as [name]'? Forgive for simplistic comment
– TSGM
Sep 28 '14 at 9:56
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Keep-alive header clarification
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When The IIS (F) sends keep alive header (or user sends keep-alive) , does it mean that (E,C,B) save a connection
No. Routers don't need to remember sessions. In fact, multiple TCP packets belonging to same TCP session need not all go through same routers - that is for TCP to manage. Routers...
What's the point of NSAssert, actually?
...ed, and this is standard practice for a lot of software, Apple for example does this. As soon as your program has detected an abnormal state you should crash. You can get a stack trace of where the error occurred, whereas if you disable asserts you could end up corrupting memory and/or user data an...
What's the difference between a Future and a Promise?
...the difference is that a future is a read-only container for a result that does not yet exist, while a promise can be written (normally only once). The Java 8 CompletableFuture and the Guava SettableFuture can be thought of as promises, because their value can be set ("completed"), but they also im...
How to show all parents and subclasses of a class in IntelliJ IDEA?
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One more thing - this still doesn't behave the same as Eclipse's quick type hierarchy: In Eclipse, when you hover over a class in the hierarchy, pressing <Enter> will open the source file with the class; in IntelliJ, you have to use the "jump to s...