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What is the purpose of Flask's context stacks?
... knows about the app application, but during create_all() it will throw an error complaining about there not being an application context. This error is justified; you never told Flask what application it should be dealing with when running the create_all method.
You might be wondering why you don'...
Convert JavaScript string in dot notation into an object reference
... index({a:{b:{c:...}}}, 'a.x.c') return undefined rather than uncaught TypeError)...:
1) This makes sense from the perspective of "we should return undefined rather than throw an error" in the 1-dimensional index situation ({})['e.g.']==undefined, so "we should return undefined rather than throw an...
How exactly does CMake work?
...
CMakeFiles directory contains CMakeError.log and CMakeOutput.log important for troubleshooting CMake builds.
– Serge Rogatch
Aug 16 '16 at 18:11
...
DateTime vs DateTimeOffset
...in the last part - even ensuring Kind are the same, comparison could be in error. If both sides have DateTimeKind.Unspecified you don't really know that they came from the same time zone. If both sides are DateTimeKind.Local, most comparisons are going to be fine, but you could still have errors i...
When would anyone use a union? Is it a remnant from the C-only days?
..."not recommended". In the embedded space it's often much cleaner and less error-prone than the alternatives, which usually either involve lots of explicit casts and void*s or masks and shifts.
– bta
Jan 26 '11 at 2:27
...
How does the const constructor actually work?
...r because the field 'j' is initialized with a non-constant value
Runtime Error:
/main.dart': error: line 5 pos 17: expression is not a valid compile-time constant
final int j = new DateTime.now().millisecond;
shar...
Should I use tag for icons instead of ? [closed]
...<icon></icon> </body> </html> and you get a single error, saying Error: Element icon not allowed as child of element body in this context.
– Digital Ninja
Dec 1 '18 at 1:18
...
Is XSLT worth it? [closed]
...es>
<FixedBugs>
<Bug id="123" component="Admin">Error when clicking the Foo button</Bug>
<Bug id="125" component="Core">Crash at startup when configuration is missing</Bug>
<Bug id="127" component="Admin">Error when clicking the Bar ...
Git Symlinks in Windows
...wd)
if [ ! -e "${target_dir}/${source_file_or_dir}" ]; then
printf 'error: git-add-symlink: %s: No such file or directory\n' \
"${target_dir}/${source_file_or_dir}" >&2
printf '(Source MUST be a path relative to the location of target!)\n' >&2
return 2
fi
gi...
What is The Rule of Three?
... into trouble:
"I pushed a person into a vector and now I get crazy memory errors!"
Remember that by default, copying an object means copying its members,
but copying the name member merely copies a pointer, not the character array it points to!
This has several unpleasant effects:
Changes via a ca...