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Can an html element have multiple ids?

...ec is very clear about this: If an element has multiple ID attributes, all of them must be treated as IDs for that element for the purposes of the ID selector.Such a situation could be reached using mixtures of xml:id, DOM3 Core, XML DTDs, and namespace-specific knowledge. Edit Just to clar...
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Unicode equivalents for \w and \b in Java regular expressions?

...cter class shorthand as "any letter, digit, or connecting punctuation" (usually: underscore). That way, a regex like \w+ matches words like hello , élève , GOÄ_432 or gefräßig . ...
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Resolving ambiguous overload on function pointer and std::function for a lambda using +

...in comp.lang.c++.moderated if a closure type could add a typedef for result_type and the other typedefs required to make them adaptable (for instance by std::not1). I was told that it could not because this was observable. I'll try to find the link. – Cassio Neri ...
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Unique ways to use the Null Coalescing operator [closed]

... Well, first of all, it's much easier to chain than the standard ternary: string anybody = parm1 ?? localDefault ?? globalDefault; vs. string anyboby = (parm1 != null) ? parm1 : ((localDefault != null) ? localDefault ...
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demystify Flask app.secret_key

If app.secret_key isn't set, Flask will not allow you to set or access the session dictionary. 2 Answers ...
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What exactly does @synthesize do?

...then will result in having two ivars, namely someInt plus an autogenerated _someInt variable. Thus self.someInt and someInt will not address the same variables any more. If you don't expect such behavior as I did this might get you some headache to find out. ...
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Remove duplicate lines without sorting [duplicate]

...e unique lines. This of course could end up being the whole file though if all the lines are unique. – deltaray Jul 11 '18 at 17:33  |  show 1...
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How to handle click event in Button Column in Datagridview?

... a single button per grid, you can jump right off to the races. Putting it all together: C#: private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e) { var senderGrid = (DataGridView)sender; if (senderGrid.Columns[e.ColumnIndex] is DataGridViewButtonColumn &am...
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Deleting Objects in JavaScript

...a C++ delete. (And accessing one of them would cause a crash. To make them all turn null would mean having extra work when deleting or extra memory for each object.) Since Javascript is garbage collected, you don't need to delete objects themselves - they will be removed when there is no way to ref...
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Is C++14 adding new keywords to C++?

...last change to the keywords table took place back in August 2011 (it's actually the first commit: that table hasn't changed since the repo went live around the time C++11 was being finalised). Alternatively we can ask GitHub to compare the two drafts that were sent for ballot for both versions of ...