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Favorite (Clever) Defensive Programming Best Practices [closed]

... When printing out error messages with a string (particularly one which depends on user input), I always use single quotes ''. For example: FILE *fp = fopen(filename, "r"); if(fp == NULL) { fprintf(stderr, "ERROR: Could not open file %s\n", filename); retu...
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File Upload without Form

...es of file_field to form_data form_data.append("user_id", 123) // Adding extra parameters to form_data $.ajax({ url: "/upload_avatar", // Upload Script dataType: 'script', cache: false, contentType: false, processData: false, data: form_data, // Setting the data attribute...
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int a[] = {1,2,}; Weird comma allowed. Any particular reason?

...at the end. e.g. for_each(my_inits.begin(), my_inits.end(), [](const std::string& value) { std::cout << value << ",\n"; }); There isn't really any advantage for the programmer. P.S. Though it is easier to autogenerate the code this way, I actually always took care not to put the ...
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WITH CHECK ADD CONSTRAINT followed by CHECK CONSTRAINT vs. ADD CONSTRAINT

...ement studio when generating sql scripts -- I'm assuming it's some sort of extra redundancy, possibly to ensure the constraint is enabled even if the default constraint behavior for a table is changed. share | ...
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See line breaks and carriage returns in editor

... the contents. So vim reads it like a Unix file, sees the CR characters as extra and displays them as ^M. – sundar - Reinstate Monica Apr 20 '18 at 22:41 2 ...
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Design Patterns web based applications [closed]

... try { Action action = ActionFactory.getAction(request); String view = action.execute(request, response); if (view.equals(request.getPathInfo().substring(1)) { request.getRequestDispatcher("/WEB-INF/" + view + ".jsp").forward(request, response); } ...
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In Python, how can you load YAML mappings as OrderedDicts?

...- else data is of type CommentedMap which functions like a dict, but has extra information that is kept around until being dumped (including the preserved comment!) share | improve this answer ...
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Difference between using bean id and name in Spring configuration file

... Since Spring 3.1 the id attribute is an xsd:string and permits the same range of characters as the name attribute. The only difference between an id and a name is that a name can contain multiple aliases separated by a comma, semicolon or whitespace, whereas an id mus...
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How can I distribute python programs?

...astic job of auto-resolving common dependencies and including them without extra configuration tweaks. Also note that if you're deploying Python 2.6 to Windows, you should apply this patch to Pyinstaller trunk. You indicated that you don't need an installer, but Inno Setup is an easy to use and qu...
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Remove duplicate entries using a Bash script [duplicate]

... I like the Perl solution because it allows me to add extra conditions, e.g. only enforce uniqueness on lines matching a certain pattern. – Amos Shapira Oct 11 '18 at 4:10 ...