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Django database query: How to get object by id?
..., mysite.com/something/9182301, you can use get_object_or_404 importing by from django.shortcuts import get_object_or_404.
Use example:
def myFunc(request, my_pk):
my_var = get_object_or_404(CLASS_NAME, pk=my_pk)
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Convert string in base64 to image and save on filesystem in Python
...odernizing this example to Python 3, which removed arbitrary codec support from string/bytes .encode() and .decode() functions:
# For both Python 2.7 and Python 3.x
import base64
with open("imageToSave.png", "wb") as fh:
fh.write(base64.decodebytes(img_data))
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Why do some C# lambda expressions compile to static methods?
...ill always be false).
See here: Why has a lambda with no capture changed from a static in C# 5 to an instance method in C# 6?
and here: Difference in CSC and Roslyn compiler's static lambda expression evaluation?
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Heap vs Binary Search Tree (BST)
... new elements are almost certain to go at the bottom
heap insertion starts from the bottom, BST must start from the top
In a binary heap, increasing the value at a given index is also O(1) for the same reason. But if you want to do that, it is likely that you will want to keep an extra index up-to...
BCL (Base Class Library) vs FCL (Framework Class Library)
...easier. While these classes are themselves written in C#, they can be used from any CLRbased language
You'll be using the BCL with some parts of the FCL with each project type. So System.Windows.Forms (a separate library) or System.Web, with the BCL from mscorlib and System.dll
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How can I assign the output of a function to a variable using bash?
...ocal builtin will accept any options that the declare builtin will accept. from a quick test, it also looks as if declare -n in a function scope also gives the variable local scope. it seems they are interchangeable here.
– init_js
Sep 6 '17 at 19:58
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Can a class extend both a class and implement an Interface
...s more general then mysqli, therefore it suggests that the latter inherits from database and not the way around.
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Invalid URI: The format of the URI could not be determined
...ring relativePath = "sites/files/images/picture.png"
When creating a Uri from these two I get the "format could not be determined" exception unless I use the constructor with the UriKind argument, i.e.
// this works, because the protocol is included in the string
Uri serverUri = new Uri(server);
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Executing JavaScript without a browser?
...oking into Javascript programming without a browser. I want to run scripts from the Linux or Mac OS X command line, much like we run any other scripting language (ruby, php, perl, python...)
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while (1) vs. while(True) — Why is there a difference (in python 2 bytecode)?
...f these cases. bool is a subclass of int, and inherits most of its methods from int, and True has an internal integer value of 1. So, whether you're doing a while test (__bool__ in 3.x, __nonzero__ in 2.x), a comparison (__eq__), or arithmetic (__add__), you're calling the same method whether you us...