C#•4y ago

how to search for a value in a list

pretty stupid question but ive tried looking online and i cant seem to find the answer, im fairly sure im using an older .net

OliOP•10/5/22, 10:58 PM

trying to do it on line 26

pip•10/5/22, 11:25 PM

using System.Linq;
string valueThatImLookingFor = "this";
list.First(p => p.Value/*or whatever the member name is*/ == valueThatImLookingFor);

using System.Linq;
string valueThatImLookingFor = "this";
list.First(p => p.Value/*or whatever the member name is*/ == valueThatImLookingFor);

OliOP•10/6/22, 6:56 AM

thanks alot

Ppip ```using System.Linq; string valueThatImLookingFor = "this"; list.First(p => p.V...

OliOP•10/6/22, 10:38 AM

what does p and first refer too

Pobiega•10/6/22, 10:43 AM

p => p.Name == attackerName

p => p.Name == attackerName

is a predicate - an anonymous function that takes in an instance of the type the list is generic over, and returns a bool.

FirstOrDefault

FirstOrDefault

will return the first item that matches the predicate (it returns true), or

default(T)

default(T)

if no items matched

PPobiega `p => p.Name == attackerName` is a predicate - an anonymous function that takes ...

OliOP•10/6/22, 10:45 AM

thanks

OliOP•10/6/22, 10:45 AM

ill try it again cause i thought p.Name had to be p.name since in the class it was name

Pobiega•10/6/22, 10:46 AM

yeah it has to match the casing of the property in the

team_create

team_create

class

Pobiega•10/6/22, 10:47 AM

you really should be using properties instead of fields for Name etc, and use proper casing (PascalCase for classes, properties, methods - camelCase for local variables)

Pobiega•10/6/22, 10:48 AM

C# doesn't have

snake_case

snake_case

as an officially accepted casing

Pobiega•10/6/22, 10:48 AM

PPobiega you really should be using properties instead of fields for Name etc, and use pr...

OliOP•10/6/22, 11:06 AM

im slightly confused

OliOP•10/6/22, 11:06 AM

i looked at the link and im still pretty lost

Pobiega•10/6/22, 11:06 AM

Well, in coding, we create a lot of things - classes, variables, methods etc

Pobiega•10/6/22, 11:06 AM

right?

OliOP•10/6/22, 11:07 AM

yep

Pobiega•10/6/22, 11:07 AM

How you name them is important.

OliOP•10/6/22, 11:07 AM

ohh

OliOP•10/6/22, 11:07 AM

i get what you mean

Pobiega•10/6/22, 11:07 AM

C# has a "naming convention" which is kind of a standard you should follow

OliOP•10/6/22, 11:07 AM

i see

Pobiega•10/6/22, 11:07 AM

so other people can easily read and understand your code

OliOP•10/6/22, 11:07 AM

makes sense

OliOP•10/6/22, 11:08 AM

so just capitalise the first letter and stuff

Pobiega•10/6/22, 11:08 AM

Thats the basics, yeah

Pobiega•10/6/22, 11:08 AM

team_create

team_create

would become

TeamCreate

TeamCreate

Pobiega•10/6/22, 11:08 AM

snake_case -> PascalCase

OliOP•10/6/22, 11:08 AM

I see

OliOP•10/6/22, 11:08 AM

oops

Pobiega•10/6/22, 11:08 AM

public string name;

public string name;

would become

public string Name { get; set; }

public string Name { get; set; }

Pobiega•10/6/22, 11:09 AM

that turns it from a public field to a public property, which might seem pointless now but become important later

OliOP•10/6/22, 11:10 AM

alr thanks

OliOP•10/6/22, 11:10 AM

where would i put that if that makers sense

Pobiega•10/6/22, 11:12 AM

You'd just replace your existing field

name

name

with that

OliOP•10/6/22, 11:12 AM

ohh i was looking in the wrong place

OliOP•10/6/22, 11:13 AM

so like this

Pobiega•10/6/22, 11:19 AM

Yep!

Pobiega•10/6/22, 11:19 AM

That looks good

OliOP•10/6/22, 11:27 AM

one last thing, what should i write in catch so that if the value isnt found in the list it goes back to try or do i use something else

OliOP•10/6/22, 11:37 AM

@Pobiega

OliOP•10/6/22, 11:38 AM

i tried looking online i found stuff like break but i dont think that will help

Pobiega•10/6/22, 11:39 AM

you'd need a loop for that

Pobiega•10/6/22, 11:40 AM

try/catch is "do this, if an exception occurs inside the try, jump to catch"

OliOP•10/6/22, 11:41 AM

ah i see

OliOP•10/6/22, 11:42 AM

i was trying to make it too complicated lol

PPobiega you'd need a loop for that

OliOP•10/6/22, 12:03 PM

sorry to keep asking but how would i convert it to a boolean

OliOP•10/6/22, 12:05 PM

wait nvm i cant convert a search into a boolean

Pobiega•10/6/22, 12:05 PM

you just wanna know if there was a match or not?

Pobiega•10/6/22, 12:05 PM

Team1.Any(x => x.Name == P1Check)

Team1.Any(x => x.Name == P1Check)