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Inheritance vs. Aggregation [closed]
...e functionality of the original class, is to split the original class in a root class and a sub class. And let the new class inherit from the root class. But you should take care with this, not to create an illogical separation.
Lets add an example. We have a class 'Dog' with methods: 'Eat', 'Walk'...
Why do we use arrays instead of other data structures?
...ss it, because I don't know where it is in memory. All I know is where the root (P1) is, so instead I have to start at P1, and follow each pointer to the desired node.
This is a O(N) look up time (The look up cost increases as each element is added). It is much more expensive to get to P1000 compa...
What is the difference between buffer and cache memory in Linux?
...g lots of I/O will use lots of memory for buffers. I'm bulkloading a 100GB MySQL/InnoDB database and buffers go above 2GB all the time.
– Marcelo Pacheco
Mar 17 at 3:15
add a ...
What are the options for storing hierarchical data in a relational database? [closed]
...
Columns: one for each lineage level, refers to all the parents up to the root, levels below the current items' level are set to 0 (or NULL)
There is a fixed limit to how deep the hierarchy can be
Cheap ancestors, descendants, level
Cheap insert, delete, move of the leaves
Expensive insert, delete,...
How to generate .NET 4.0 classes from xsd?
...
2.
Within “XML Schema Explorer” scroll all the way down to find the root/data node. Right click on root/data node and it will show “Generate Sample XML”. If it does not show, it means you are not on the data element node but you are on any of the data definition node.
Copy your genera...
Django: How to manage development and production settings?
...
MIDDLEWARE = [...]
TEMPLATES = [{...}]
...
STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')
MEDIA_ROOT = os.path.join(BASE_DIR, '/path/')
MEDIA_URL = '/path/'
Open dev.py and include that stuff which is development specific for example:
dev.py:
DEBUG = True
ALLOWED_HOST...
DateTime.Now vs. DateTime.UtcNow
...t know UtcNow has better performance and that simply saving your dates in mysql and assuming that is utc and comparing date dependent displays with UtcNow simplifies this global timezone issues
– Diin
May 14 '19 at 16:48
...
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is no
...uts or the connection pool size. You'll need to dive in and figure out the root cause. If you need help resolving that root cause you can post your own question.
– Marnix van Valen
Jul 28 '14 at 6:36
...
git rebase without changing commit timestamps
...so work with:
interactive rebase (rebase -i/rebase --interactive)
for the root commit (git rebase --root)
See "Change timestamps while rebasing git branch".
(Original answer, June 2012)
You could try, for a non-interactive rebase
(see just above: with Git 2.29, Q4 2020, that will work with an int...
Why is IntelliJ 13 IDEA so slow after upgrading from version 12?
...it integration by opening the project settings dialog and deleting the git root, and the problem goes away.
I tried disabling all of the GIT background operations through the 13 UI, but it didn't make a difference. I also tried both GIT built-in and native modes, and it made no difference.
In my ...