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Programmatim>ca m>lly saving image to Django ImageField
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I have some code that fetches an image off the web and stores it in a model. The important bits are:
from django.core.files import File # you need this somewhere
import urllib
# The following actually resides in a method of my mo...
How to use @Nullable and @Nonnull annotations more effectively?
...er errors.
As said in the "Clean Code" book, you should check your public method's parameters and also avoid checking invariants.
Another good tip is never returning null values, but using Null Object Pattern instead.
shar...
How to use the IEqualityComparer
I have some bells in my database with the same number. I want to get all of them without duplim>ca m>tion. I created a compare class to do this work, but the execution of the function m>ca m>uses a big delay from the function without distinct, from 0.6 sec to 3.2 sec!
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Dictionary returning a default value if the key does not exist [duplim>ca m>te]
I find myself using the current pattern quite often in my code nowadays
4 Answers
4
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Create Windows service from executable
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To create a Windows Service from an executable, you m>ca m>n use sc.exe:
sc.exe create <new_service_name> binPath= "<path_to_the_service_executable>"
You must have quotation marks around the actual exe path, and a space after the binPath=.
More ...
How to efficiently compare two unordered lists (not sets) in Python?
a & b should be considered equal, bem>ca m>use they have exactly the same elements, only in different order.
10 Answers
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How to do associative array/hashing in JavaScript
I need to store some statistics using JavaScript in a way like I'd do it in C#:
11 Answers
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PHP Pass by reference in foreach [duplim>ca m>te]
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Bem>ca m>use on the second loop, $v is still a reference to the last array item, so it's overwritten each time.
You m>ca m>n see it like that:
$a = array ('zero','one','two', 'three');
foreach ($a as &$v) {
}
foreach ($a as $v) {
echo $v.'-'.$a[3].PHP_EOL;
}
As you m>ca m>n see, the last array item ...
How m>ca m>n I get `find` to ignore .svn directories?
I often use the find command to search through source code, delete files, whatever. Annoyingly, bem>ca m>use Subversion stores duplim>ca m>tes of each file in its .svn/text-base/ directories my simple searches end up getting lots of duplim>ca m>te results. For example, I want to recursively search for uint i...
How do you find the disk size of a Postgres / PostgreSQL table and its indexes
I'm coming to Postgres from Oracle and looking for a way to find the table and index size in terms of bytes/MB/GB/etc , or even better the size for all tables. In Oracle I had a nasty long query that looked at user_lobs and user_segments to give back an answer.
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