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When does invoking a member function on a null instance result in undefined behavior?
...) and (b) result in undefined behavior. It's always undefined behavior to call a member function through a null pointer. If the function is static, it's technically undefined as well, but there's some dispute.
The first thing to understand is why it's undefined behavior to dereference a null poin...
How to create a template function within a class? (C++)
... Not exactly true. The definition can be in a cpp file, as long as it is called once for each unique template parameter n-uplet from a non-template function/method after it has been defined.
– Benoît
Jun 9 '09 at 21:13
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Usage of sys.stdout.flush() method
... the data "written" to standard out before it writes it to the terminal). Calling sys.stdout.flush() forces it to "flush" the buffer, meaning that it will write everything in the buffer to the terminal, even if normally it would wait before doing so.
Here's some good information about (un)buffere...
How to create a database from shell command?
...for something like createdb in PostgreSQL or any other solution that would allow me to create database with a help of a shell command. Any hints?
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Resetting the UP-TO-DATE property of gradle tasks?
Is there a way I can force a gradle task to run again, or reset all tasks back to the not UP-TO-DATE state?
4 Answers
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Store JSON object in data attribute in HTML jQuery
...in the text just use $('#myElement').data('key',jsonObject);
it won't actually be stored in the html, but if you're using jquery.data, all that is abstracted anyway.
To get the JSON back don't parse it, just call:
var getBackMyJSON = $('#myElement').data('key');
If you are getting [Object Objec...
MySQL Multiple Joins in one query?
...s is a possibility, you may want to do a LEFT OUTER JOIN which will return all your dashboard messages and an image_filename only if one exists (otherwise you'll get a null)
SELECT dashboard_data.headline, dashboard_data.message, dashboard_messages.image_id, images.filename
FROM dashboard_data
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javascript remove “disabled” attribute from html input
... inside that form. You could also use getElementsByTagName('input') to get all input elements. In your for iteration, you'd then have to check that inputs[i].type == 'text'.
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How to turn off CodeLens-References
I recently installed Visual Studio 2013 Ultimate.
Now, as you know, there is this "n references" above all methods.
4 Answ...
How to display the current year in a Django template?
What is the inbuilt template tag to display the present year dynamically. Like "2011" what would be the template tag to display that?
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