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Class with Object as a parameter
... '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__']
Also, properties and super do not work with classic classes.
In Python2 it is a good idea to make all classes new-style classes. ...
How big is too big for a PostgreSQL table?
...f what you are doing.
Depending on your data distribution you can use a mixture of indexes, filtered indexes, and table partitioning of some kind to speed thing up once you see what performance issues you may or may not have. Your problem will be the same on any other RDMS that I know of. If you o...
Using comparison operators in Scala's pattern matching system
... to match on a comparison using the pattern matching system in Scala?
For example:
4 Answers
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What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?
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Updated 2020...
Bootstrap 5
In Bootstrap 5 (alpha) there is a new -xxl- size:
col-* - 0 (xs)
col-sm-* - 576px
col-md-* - 768px
col-lg-* - 992px
col-xl-* - 1200px
col-xxl-* - 1400px
Bootstrap 5 Grid Demo
Bootstrap 4
In Bootstrap 4 there is a new -xl- size, see this demo. Also the -xs- infix ...
Why do we use arrays instead of other data structures?
..., so let's look at how memory is managed in C.
Before I dive in, a quick explanation of what the term "pointer" means. A pointer is simply a variable that "points" to a location in memory. It doesn't contain the actual value at this area of memory, it contains the memory address to it. Think of a b...
How can I change an element's class with JavaScript?
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Understanding the difference between Object.create() and new SomeFunction()
...tructor's prototype, e.g.:
var o = new SomeConstructor();
In the above example, o inherits directly from SomeConstructor.prototype.
There's a difference here, with Object.create you can create an object that doesn't inherit from anything, Object.create(null);, on the other hand, if you set SomeC...
How do I make this file.sh executable via double click?
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By default, *.sh files are opened in a text editor (Xcode or TextEdit). To create a shell script that will execute in Terminal when you open it, name it with the “command” extension, e.g., file.command. By default, these are sent to Terminal, which will execute ...
What Every Programmer Should Know About Memory?
...ory: how CPU cache works, what are physical and virtual memory and how Linux kernel deals that zoo. Probably there are outdated API references in some examples, but it doesn't matter; that won't affect the relevance of the fundamental concepts.
So, any book or article that describes something funda...