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Numbering rows within groups in a data frame
...hanks! The dplyr solution is good. But if, like me, you kept getting weird errors when trying this approach, make sure that you are not getting conflicts between plyr and dplyr as explained in this post It can be avoided by explicitly calling dplyr::mutate(...)
– EcologyTom
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RegEx match open tags except XHTML self-contained tags
... ~10k pages, all with the same HTML template. They were littered with HTML errors that caused parsers to choke, and all their styling was inline or with <font> etc.: no classes or IDs to help navigate the DOM. After fighting all day with the "right" approach, I finally switched to a regex solu...
Is there anything like inotify on Windows?
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FileSystemWatcher() is unreliable mainly due to the fact it's error handling for the watcher buffer is more or less incomplete. Due to a lack of path and detailed error handling information, Microsoft gives you no way to recover or manually poll the working directory.
The JNotify for W...
Preloading images with JavaScript
...ment for the i-variable. Otherwise it will be set globally which can cause error that are really hard to solve (unless you know that you forgot the var statement. for (var i = 0.....
– Mohammer
Jun 13 '16 at 23:37
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jQuery - What are differences between $(document).ready and $(window).load?
...pt>
Query 3.0 version
Breaking change: .load(), .unload(), and .error() removed
These methods are shortcuts for event operations, but had several API
limitations. The event .load() method conflicted with the ajax .load()
method. The .error() method could not be used with window.on...
Sending JWT token in the headers with Postman
...tive runs and test any response as endpoint unit tests. Save them and find errors when you change code. I haven't used the command line utility but I understand that you can configure it to run in your ci-pipeline.
– Pablo Palacios
Jan 5 '17 at 2:21
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What breaking changes are introduced in C++11?
...ain() { auto int i = 0; return i; } is perfectly valid C++03, but a syntax error in C++11. The only warning I can get compilers to give for it in C++03 mode is a warning about compatibility.
– user743382
Sep 14 '14 at 10:37
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Can the Android drawable directory contain subdirectories?
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As of Android 2.2, this doesn't cause a compiler error, but any subdirectories are ignored when generating the R class. This really sucks, and makes it hard to manage larger projects. =/
– Nik Reiman
Jul 28 '10 at 8:42
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Merge/flatten an array of arrays
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Ahh, I found your error. You have an extra pair of square brackets in your notation, should be [].concat([1],[2,3],[4],...).
– Ryan Kennedy
Aug 6 '13 at 15:27
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How to set the id attribute of a HTML element dynamically with angularjs (1.x)?
... This will work correct in 90% of cases but you may sometimes get errors which are hard to debug. You should use ng-attr-id instead.
– Baki
Jun 3 '16 at 13:32
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