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How to implement a rule engine?
...ad of 'greater_than' etc. - this is because 'GreaterThan' is the .NET name for the operator, therefore we don't need any extra mapping.
If you need custom names you can build a very simple dictionary and just translate all operators before compiling the rules:
var nameMap = new Dictionary<string,...
WPF OpenFileDialog with the MVVM pattern? [duplicate]
I just started learning the MVVM pattern for WPF. I hit a wall: what do you do when you need to show an OpenFileDialog ?
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How do I use Java to read from a file that is actively being written to?
I have an application that writes information to file. This information is used post-execution to determine pass/failure/correctness of the application. I'd like to be able to read the file as it is being written so that I can do these pass/failure/correctness checks in real time.
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Can comments be used in JSON?
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BTW, the json library for Java google-gson has support for comments.
– centic
Oct 1 '12 at 12:21
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how to detect search engine bots with php?
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The regex in this answer is nice for being simple and wide-spanning. For my purpose I want to be quick but I don't care if there's a few false positives or false negatives.
– Gregory
Apr 6 '17 at 11:23
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Convert a series of parent-child relationships into a hierarchical tree?
... I'd like to turn into as few heirarchical tree structures as possible. So for example, these could be the pairings:
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Determine the line of code that causes a segmentation fault?
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Use bt as a shorthand for backtrace.
– rustyx
May 27 '19 at 7:53
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How do I capture SIGINT in Python?
...rocesses in a pipeline, so the shell may close STDOUT (now "output.log") before program.py finishes printing the final log. Python will complain, "close failed in file object destructor: Error in sys.excepthook:".
– Noah Spurrier
Jul 3 '11 at 22:07
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Test if a variable is a list or tuple
...ually need. However, sometimes you need to behave differently if someone, for instance, passes a string. My preference there would be to explicitly check for str or unicode like so:
import types
isinstance(var, types.StringTypes)
N.B. Don't mistake types.StringType for types.StringTypes. The l...
Rspec doesn't see my model Class. uninitialized constant error
I'm writing tests on Rspec for my models in Ruby on Rails application.
And I receive this error while starting 'rspec spec'
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