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error: passing xxx as 'this' argument of xxx discards qualifiers

...ere the value type is the same as the key type, both iterator and const_iterator are constant iterators. It is unspecified whether or not iterator and const_iterator are the same type. So VC++ 2008 Dinkumware implementation is faulty. Old answer: You got that error because in certain...
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Format a datetime into a string with milliseconds

... Useful with timezone too: date = datetime(2019,5,10) date_with_tz = pytz.timezone('Europe/Rome').localize(date) date_with_tz.isoformat(sep='T', timespec='milliseconds') output: '2019-05-10T00:00:00.000+02:00' – Ena May 10 '19 at 9:17 ...
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Android Use Done button on Keyboard to click button

... You can use this one also (sets a special listener to be called when an action is performed on the EditText), it works both for DONE and RETURN: max.setOnEditorActionListener(new OnEditorActionListener() { @Override public boolean onEditorAction(TextView v, int acti...
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How to reset db in Django? I get a command 'reset' not found error

... It looks like the 'flush' answer will work for some, but not all cases. I needed not just to flush the values in the database, but to recreate the tables properly. I'm not using migrations yet (early days) so I really needed to drop all the tables. Two ways I've found to drop all ...
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Count Rows in Doctrine QueryBuilder

... He accepted your answer so I guess all is well. I was under the impression that he only wanted a count without the overhead of actually retrieving the rows which my example shows. There is of course no reason why where conditions could not be added. ...
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nodejs get file name from absolute path?

... extension from filename, you can use https://nodejs.org/api/path.html#path_path_basename_path_ext path.basename('/foo/bar/baz/asdf/quux.html', '.html'); share | improve this answer | ...
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How can I listen for a click-and-hold in jQuery?

...tartTrigger(e) { var $elem = $(this); $elem.data('mouseheld_timeout', setTimeout(function() { $elem.trigger('mouseheld'); }, e.data)); } function stopTrigger() { var $elem = $(this); clearTimeout($elem.data('mouseheld_timeout')); } ...
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How can I get the behavior of GNU's readlink -f on a Mac?

...in your own script where you'd like to call readlink -f #!/bin/sh TARGET_FILE=$1 cd `dirname $TARGET_FILE` TARGET_FILE=`basename $TARGET_FILE` # Iterate down a (possible) chain of symlinks while [ -L "$TARGET_FILE" ] do TARGET_FILE=`readlink $TARGET_FILE` cd `dirname $TARGET_FILE` T...
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Django: How to manage development and production settings?

...s you define environment variables in an "environment" (.env) file. Finally, note that you can take advantage of the PYTHONPATH variable to store the settings in a completely different location (e.g. on a production server, storing them in /etc/). This allows for separating configuration from ap...
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Calling constructors in c++ without new

...d the most common way of creating new dynamic objects instead of using auto_ptr, unique_ptr, or related. – Fred Nurk Jan 18 '11 at 13:18 3 ...