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C# generic type constraint for everything nullable
...valent to OR in generics. However I can propose to use default key word in order to create null for nullable types and 0 value for structures:
public class Foo<T>
{
private T item;
public bool IsNullOrDefault()
{
return Equals(item, default(T));
}
}
You could also i...
What are naming conventions for MongoDB?
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Naming convention for collection
In order to name a collection few precautions to be taken :
A collection with empty string (“”) is not a valid collection name.
A collection name should not contain the null character because this defines the end of collect...
Nginx serves .php files as downloads, instead of executing them
...art from a select few like .html, .js etc. which are static files)
Thus in order to run other kinds of files we need something that sits between nginx and the application (here the php application). This is where common gateway interface (CGI) comes in. It's a piece of software that manages this com...
Create table (structure) from existing table
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I thought 1=2 would be just a weird wrong argument in order to avoid copying data.
– Arthur Zennig
Sep 28 '16 at 10:21
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How to use multiple @RequestMapping annotations in spring?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Difference between local and global indexes in DynamoDB
... make sure you pay special attention to the following requirements:
In order for a table write to succeed, the provisioned throughput
settings for the table and all of its global secondary indexes must
have enough write capacity to accommodate the write; otherwise, the
write to the table w...
How to check that an element is in a std::set?
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std::set is typically implemented with an ordered tree structure, so count() and find() will both have O(logn). Neither will iterate over all elements in the set.
– Alan
Nov 9 '09 at 16:41
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How can I brew link a specific version?
...ds:
$ brew update
$ brew install swiftgen
then follow the steps below in order to run swiftgen with older version.
Step 1: brew uninstall swiftgen
Step 2: Navigate to: https://github.com/SwiftGen/SwiftGen/releases
and download the swiftgen with version: swiftgen-4.2.0.zip.
Unzip the package in a...
How can I change the default Django date template format?
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In order to change date format in the views.py and then assign it to template.
# get the object details
home = Home.objects.get(home_id=homeid)
# get the start date
_startDate = home.home_startdate.strftime('%m/%d/%Y')
# ass...
How does the MapReduce sort algorithm work?
...the partition into its own mini partition, perhaps by the key alphabetical order. So, in partition 1, get me all the things that starts with A and output it into mini partition A of x. Create a new A(x) if currently there is an A(x) already. Replace x with sequential number (perhaps this is the s...