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Iterator invalidation rules
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C++17 (All references are from the final working draft of CPP17 - n4659)
Insertion
Sequence Containers
vector: The functions insert, emplace_back, emplace, push_back cause reallocation if the new size is greater than the old capacity. Reallocation ...
Django: ImproperlyConfigured: The SECRET_KEY setting must not be empty
... the same problem after restructuring the settings as per the instructions from Daniel Greenfield's book Two scoops of Django.
I resolved the issue by setting
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "project_name.settings.local")
in manage.py and wsgi.py.
Update:
In the above solution...
Show a popup/message box from a Windows batch file
Is there a way to display a message box from a batch file (similar to how xmessage can be used from bash-scripts in Linux)?
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How to stop EditText from gaining focus at Activity startup in Android
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Excellent answers from Luc and Mark however a good code sample is missing. Adding the tag android:focusableInTouchMode="true" and android:focusable="true" to parent layout (e.g. LinearLayout or ConstraintLayout) like the following example will...
Running code in main thread from another thread
...hat I need to update it. Since the original answer was posted, the comment from @dzeikei has gotten almost as much attention as the original answer. So here are 2 possible solutions:
1. If your background thread has a reference to a Context object:
Make sure that your background worker threads hav...
What is move semantics?
...e pointer and then set the original pointer to null (to prevent 'delete[]' from source object's destructor from releasing our 'just stolen data'). In effect, we have "stolen" the data that originally belonged to the source string. Again, the key insight is that under no circumstance could the client...
Throwing exceptions from constructors
I'm having a debate with a co-worker about throwing exceptions from constructors, and thought I would like some feedback.
1...
How do I get the fragment identifier (value after hash #) from a URL?
...ting TLS 1.2 next week (30 June 2018), you will not be able to do payments from them at all. So that makes all these old crappy browsers useless for any ecommerce client.
– Schalk Keun
Jun 22 '18 at 12:05
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wget/curl large file from google drive
I'm trying to download a file from google drive in a script, and I'm having a little trouble doing so. The files I'm trying to download are here .
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Echo a blank (empty) line to the console from a Windows batch file [duplicate]
When outputting status messages to the console from a Windows batch file, I want to output blank lines to break up the output. How do I do this?
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