05-29-2009
Find top N values for field X based on field Y's value
I want to find the top N entries for a certain field based on the values of another field.
For example if N=3, we want the 3 best values for each entry:
Entry1 ||| 100
Entry1 ||| 95
Entry1 ||| 30
Entry1 ||| 80
Entry1 ||| 50
Entry2 ||| 40
Entry2 ||| 20
Entry2 ||| 10
Entry2 ||| 50
Entry2 ||| 30
would return
Entry1 ||| 100
Entry1 ||| 95
Entry1 ||| 80
Entry2 ||| 40
Entry2 ||| 50
Entry2 ||| 30
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LEARN ABOUT NETBSD
dup_field
FORMS(3) BSD Library Functions Manual FORMS(3)
NAME
dup_field, free_field, link_field, new_field -- form library
LIBRARY
Curses Form Library (libform, -lform)
SYNOPSIS
#include <form.h>
FIELD *
dup_field(FIELD *field, int frow, int fcol);
int
free_field(FIELD *field);
FIELD *
link_field(FIELD *field, int frow, int fcol);
FIELD *
new_field(int rows, int cols, int frow, int fcol, int nrows, int nbuf);
DESCRIPTION
The dup_field() function duplicates the given field, including any buffers associated with the field and returns the pointer to the newly
created field. free_field() destroys the field and frees any allocated resources associated with the field. The function link_field()
copies the given field to a new field at the location frow and fcol but shares the buffers with the original field. new_field() creates a
new field of size rows by cols at location frow, fcol on the page, the argument nrows specified the number of off screen rows the field has
and the nbuf parameter specifies the number of extra buffers attached to the field. There will always be one buffer associated with a field.
RETURN VALUES
On error dup_field() and new_field() will return NULL. The functions will one of the following error values:
E_OK The function was successful.
E_BAD_ARGUMENT A bad argument was passed to the function.
E_CONNECTED The field is connected to a form.
SEE ALSO
curses(3), forms(3)
NOTES
The header <form.h> automatically includes both <curses.h> and <eti.h>.
BSD
January 1, 2001 BSD