All Questions

2
answers

How to exclude element from a list in R

I have this list: x = list(1, 3, 5, 8, 13) How do I delete the second element?     
asked on 17.06.2016 / 04:04
2
answers

Is this polymorphism?

Is this polymorphism? If so, why? I think it's because there is no method call. Please explain if I am correct or correct me. Thank you :) OutputStream saida = new FileOutputStream("alunos.pdf");     
asked on 26.07.2016 / 05:54
2
answers

What is the difference between .prop () and .attr ()?

Do these two jQuery functions do exactly the same thing? Or is there any difference between them. It is reported that the .prop() function came from jQuery 1.6 Did it come to replace .attr() ? Or are both present (and used) in...
asked on 02.03.2016 / 18:27
1
answer

How to subtract dates in laravel?

I need to calculate working time on a call. For this I need to do operations with date , how do I do this in laravel ? Code: public function ticketsByUserSearch(Request $request) { $user = new User(); $user = $user-&g...
asked on 08.09.2016 / 15:48
2
answers

What are the differences between npm and Yarn?

I'm thinking of migrating from npm to Yarn , can anyone tell me the main differences? Is there any considerable benefit between the two?     
asked on 19.09.2017 / 14:17
1
answer

Does the size of a variable name affect its weight?

There is a difference in size between this: string packet1234 = "123"; And that? string packert1234556 = "123";     
asked on 16.02.2015 / 21:56
1
answer

Difference between keyup (), keydown () and keypress () [duplicate]

I would like to know the difference between keyup() , keydown() and keypress() , in my opinion I think they do the same thing, but what is the purpose of each? Performance improvement for each type?     
asked on 21.01.2016 / 14:38
1
answer

What is the purpose of the third parameter of AddEventListener?

When I want to add a listener of some event in Javascript I use addEventListener . document.addEventListener('click', function (e) { alert('clicked'); }) But I noticed that in some codes, a third parameter is used, which...
asked on 29.08.2016 / 14:19
2
answers

What's the difference between SaveChanges and SubmitChanges?

Within the context Entity Framework what is the difference between SaveChanges and SubmitChanges ? When should I use one or the other?     
asked on 07.10.2016 / 20:03
2
answers

What is the difference between Web Server and Application Server?

What's the difference between Web Server and Application Server ? Where is each / should be used? Is there any interaction between them (can a software use the 2 technologies together)?     
asked on 10.04.2016 / 19:45