All Questions

2
answers

When to use these commands?

What criteria do I use to apply the getch(); , return0; , and system("pause") commands to the end of a program?     
asked on 19.11.2018 / 16:06
1
answer

Rearrange data frame in a list using dplyr in R

This is my dataframe: dput(df) structure(list(ind = structure(c(16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 16437, 1...
asked on 16.09.2018 / 22:29
2
answers

Count how many fields are blank in a MYSQL row

I have a registration table with 53 columns (address, phone, etc.). I wanted to set up a query that would bring me how many of these columns are empty or NULL, how can I do this?     
asked on 11.10.2018 / 19:49
1
answer

What problems can occur when using the "http://tempuri.org/" namespace in our webServices?

When creating a webService, in my case using ASP.NET, I always change the default namespace to someone related to my project, usually using the site URL for this. But lately I've had the need to integrate systems and usually other developers...
asked on 14.11.2014 / 12:22
1
answer

Average repeated lines

People, I have a data.frame as follows Gene 12h 10d 6w Slc39a10 1.52 -6.72 -1.84 Slc39a10 1.52 -6.72 -1.84 Mfsd6 -0.15 0.672 0.26 Mfsd6 -2.55 -...
asked on 16.10.2018 / 20:31
1
answer

Binary calculator in C

I have this function that converts decimal to binary, but then how do I sum the bits, or use & (and) .. etc? Use the & do we have to make the count with 2 decimals? Ex: 25 & 25 Or we can do 11001 & 11001 My question...
asked on 22.08.2018 / 23:31
2
answers

Replacing for by Lapply function in R

This is my list lista1<-list(c(1, 2, 3, 4, 5), c(6, 7, 8, 9, 10), c(11, 12, 13, 14, 15 ), c(16, 17, 18, 19, 20), c(21, 22, 23, 24, 25)) I build a new list of the way below. novalista <- vector(mode = "list", length=5) for (i in 1:5...
asked on 27.08.2018 / 03:49
2
answers

Navbar does not hide the div title when item is clicked

How do you make sure that the fixed header does not hide the elements? I'm using bootstrap 4 for a navbar. Here, for example, I have a fixed header and some divs with titles. When I click on an item, it redirects (with href) to that session ......
asked on 29.08.2018 / 17:07
2
answers

PL / SQL anonymous block | ERROR PLS-00103: Encountered the symbol "CREATE" when expecting one of the following:

I get the following error: [Err] ORA-06550: line 7, column 2: PLS-00103: Encountered the symbol "CREATE" when expecting one of the following: I'm using a create sequence inside my BEGIN with; and / but did not resolve the error. DECL...
asked on 13.09.2018 / 16:21
1
answer

Is it possible to assign a native function to a variable?

A hypothetical example ... let _ = document.querySelector; _(".hello").style.color = 'blue'; <div class="hello">Hello world!</div>     
asked on 11.09.2018 / 21:18