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Real world use cases of bitwise operators [closed]

...checksums, parity, stop bits, flow control algorithms, and so on, which usually depend on the logic values of individual bytes as opposed to numeric values, since the medium may only be capable of transmitting one bit at a time. Compression, Encryption Both of these are heavily dependent on bitwise ...
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How to implement a rule engine?

...Rules = rules.Select(r => CompileRule(r)).ToList(); public bool MatchesAllRules(User user) { return compiledRules.All(rule => rule(user)); } Here is the implementation of BuildExpr: Expression BuildExpr(Rule r, ParameterExpression param) { var left = MemberExpression.Property(param, ...
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Best way to test if a row exists in a MySQL table

...RE ...) and per the documentation, you can SELECT anything. Traditionally, an EXISTS subquery starts with SELECT *, but it could begin with SELECT 5 or SELECT column1 or anything at all. MySQL ignores the SELECT list in such a subquery, so it makes no difference. ...
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Which characters are valid in CSS class names/selectors?

What characters/symbols are allowed within the CSS class selectors? I know that the following characters are invalid , but what characters are valid ? ...
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How to use a custom comparison function in Python 3?

...e a workaround, but I think I am going to lose some performance by passing all the comparison operators < > = to middle man, since my original custom sort is written in C , it had around 1/2x speed of default sort. – YOU Mar 28 '10 at 5:26 ...
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How to match a String against string literals in Rust?

...ething else!"), } Note that you also have to explicitly handle the catch-all case. share | improve this answer | follow | ...
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Saving images in Python at a very high quality

...nd trying to get good figures in a latex document, save as an eps. Specifically, try something like this after running the commands to plot the image: plt.savefig('destination_path.eps', format='eps') I have found that eps files work best and the dpi parameter is what really makes them look good ...
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Use gulp to select and move directories and their files

I'm currently using gulp to call a bash script that cleans my dist/ directory and moves the appropriate files to the clean directory. I would like this to be done with gulp because I am not sure the script would work on a non *nix file system. So far, I'm using the gulp-clean module to clean the...
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How to add a WiX custom action that happens only on uninstall (via MSI)?

I would like to modify an MSI installer (created through WiX ) to delete an entire directory on uninstall. 6 Answers ...
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Unit Testing AngularJS directive with templateUrl

... You're correct that it's related to ngMock. The ngMock module is automatically loaded for every Angular test, and it initializes the mock $httpBackend to handle any use of the $http service, which includes template fetching. The template system tries to load the template through $http and it become...