overwrite

I'm learning to update column data using this previous post . However, is there a trick for specifying which column should provide the final updated value in case of a conflict. For example, I can combine columns of data as long as only one value exists per row: data <- data.frame('a' = c('A','B','C','D','E'), 'x' = c(NA,NA,3,NA,NA), 'y' = c(1,2,NA,NA,NA), 'z' = c(NA,NA,NA,4,5)) cbind.data.frame(data3[1], mycol=c(na.omit(c(t(data3[, -1]))))) How would I force the value to come from newVal in the following case? data <- data.frame('a' = c('A','B','C','D','E','F'), 'x' = c(NA,NA,NA,3,NA,NA), 'y'

I'm trying to write a method that will, given a file containing values to update or append, will update a second binary file. Apparently, when I overwrite a struct in the binary file, the offsets somehow change and that corrupts everything after it. Am I doing something wrong, and is there a way to prevent this without truncating and appending to the file? Current code: typedef struct{ int number; double price; } stock; void update(char* updatefile, char* binfile){ FILE *fin, *fout; stock *currStock; stock *updateStock; int currPos; int update; int val1=0; double val2=0; currStock = malloc

I've written some Perl code which compose two classes inherent from a base one. I suppose it would print something like this Mik: Meow! Meow! Sat: Woof! Woof! But it actually print this way: Sat: Woof! Woof! Sat: Woof! Woof! , package Animal; sub new { my $obj = shift; my $name = shift; our %pkg = ( 'name' => $name ); bless \%pkg, $obj; return \%pkg; } package Cat; @ISA = ("Animal"); sub new { my $obj = shift; my $name = shift; my $self = $obj->SUPER::new($name); return $self; } sub get_name { my $obj = shift; return $obj->{'name'}; } sub talk { my $obj = shift; return "Meow! Meow!"; } package

I need to export excel from viewlist, I used this code Excel.Application app = new Excel.Application(); //app.Visible = true; Excel.Workbook wb = app.Workbooks.Add(1); Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets[1]; int i = 1; int i2 = 1; foreach (ListViewItem lvi in lvLogs.Items) { i = 1; foreach (ListViewItem.ListViewSubItem lvs in lvi.SubItems) { ws.Cells[i2, i] = lvs.Text; i++; } i2++; } wb.SaveAs(@"C:\1\myExcel.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing,

I'm trying to create a basic highscore system for a project I'm working on. The problem I'm having is, although I write the names into my main they just overwrite the previous. Currently I have this: void ManagePoint::saveScore(string Name, int Score) { ofstream newFile("scorefile.txt"); if(newFile.is_open()) { newFile << Name << " " << Score; } else { //You're in trouble now Mr! } newFile.close(); } and for testing I'm adding them like so: runner->saveScore("Robert", 34322); runner->saveScore("Paul", 526); runner->saveScore("Maxim", 34322); On load display all that will appear is Maxim's