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LINQ's Distinct() on a particular property
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What if I want to obtain a distinct list based on one or more properties?
Simple! You want to group them and pick a winner out of the group.
List<Person> distinctPeople = allPeople
.GroupBy(p => p.PersonId)
.Select(g => g.First())
.ToList();
I...
What does “O(1) access time” mean?
...rily mean "quickly". It means that the time it takes is constant, and not based on the size of the input to the function. Constant could be fast or slow. O(n) means that the time the function takes will change in direct proportion to the size of the input to the function, denoted by n. Again, it...
How to drop a database with Mongoose?
I'm preparing a database creation script in Node.js and Mongoose.
How can I check if the database already exists, and if so, drop (delete) it using Mongoose?
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Best practices when running Node.js with port 80 (Ubuntu / Linode) [closed]
...Digital Ocean, AWS EC2 and other VPS providers as well. However, on RedHat based systems /etc/rc.local is /ect/rc.d/local.
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How to change the default encoding to UTF-8 for Apache?
...ion in the
filename, and apache will output the
proper encoding header based on that.
This is possible thanks to the
AddCharset lines in the conf file,
such as the line below:
conf/httpd.conf:
AddCharset UTF-8 .utf8
So if you have a file whose
names ends in .html.utf8, apache...
Removing a list of characters in string
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Useful in similar cases not based on chars and strings +1
– Wolf
Sep 20 '14 at 7:59
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PHP Array to CSV
...pid totals sales leads dish dishnet top200_plus top120 latino base_packages
G-adriana ADRIANA EUGENIA PALOMO PAIZ 886 0 19 0 0 0 0 0
You could easily remove that "intro" (descriptive) column, but in my case I had repeating ...
Is there some way to PUSH data from web server to browser?
...s with HTTP and then upgrade them to two-directional client-server message-based communication.
You can easily initiate the connection from javascript:
var ws = new WebSocket("ws://your.domain.com/somePathIfYouNeed?args=any");
ws.onmessage = function (evt)
{
var message = evt.data;
//decode m...
how to delete all cookies of my website in php
...mezones
setcookie($name, '', 1, '/');
}
}
}
Also based on this PHP-Answer
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T-SQL: Deleting all duplicate rows but keeping one [duplicate]
... work because it operates on all columns and I need to suppress duplicates based on the key columns.
3 Answers
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