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What is the worst real-world macros/pre-processor abuse you've ever come across?

...piler found an error in our code. This might also reduce the occurrence of testing by compilation. – MikeyB Jun 25 '09 at 19:52 5 ...
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jQuery equivalent of JavaScript's addEventListener method

.../ajax/libs/jquery/3.4.1/jquery.min.js"></script> <button>test 1</button> <button>test 2</button> share | improve this answer | foll...
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Any reason not to use '+' to concatenate two strings?

... I have done a quick test: import sys str = e = "a xxxxxxxxxx very xxxxxxxxxx long xxxxxxxxxx string xxxxxxxxxx\n" for i in range(int(sys.argv[1])): str = str + e and timed it: mslade@mickpc:/binks/micks/ruby/tests$ time python /binks/m...
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C++ - passing references to std::shared_ptr or boost::shared_ptr

...d is complete we can store the new previous message. All good. Here's some test code: send_message(std::shared_ptr<std::string>(new std::string("Hi"))); send_message(previous_message); And as expected, this prints Hi! twice. Now along comes Mr Maintainer, who looks at the code and thinks: ...
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Set cursor position on contentEditable

...ould work if dropped directly into the body of an html page if you want to test it quickly: <div id="area" style="width:300px;height:300px;" onblur="onDivBlur();" onmousedown="return cancelEvent(event);" onclick="return cancelEvent(event);" contentEditable="true" onmouseup="saveSelection();" onk...
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How do I ignore files in a directory in Git?

...mmands is executed now, the directory will be (unexpectedly) lost. mkdir test cd test git init echo "/localdata/*" >.gitignore git add .gitignore git commit -m "Add .gitignore." mkdir localdata echo "Important data" >localdata/important.dat touch untracked-file If you do a git status --ign...
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Handling an empty UITableView. Print a friendly message

...empty message goes with the scrolling behavior ... – testing Nov 6 '14 at 13:28 @testing obviously if you need the emp...
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How to calculate date difference in JavaScript?

... @rudeovskizebear—tested in IE, Firefox and Safari, works fine. It uses basic ECMAScript that I'd expect to work in any browser, what doesn't work for you? – RobG May 17 '13 at 5:27 ...
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Spring MVC: Complex object as GET @RequestParam

... data class SearchDTO(var id: Array<Long> = arrayOf()) the Spring (tested in Boot) returns the following error for request mentioned in answer: "Failed to convert value of type 'java.lang.String[]' to required type 'java.lang.Long[]'; nested exception is java.lang.NumberFormatExcepti...
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What is PEP8's E128: continuation line under-indented for visual indent?

...erators['dev']), \ combine_sample_generators(sample_generators['test']) Which will give the same style-warning. In order to get rid of it I had to rewrite it to: return \ combine_sample_generators(sample_generators['train']), \ combine_sample_generators(sample_gener...