Posts by Hilton Fernandes • 140 points
5 posts
-
0
votes2
answers73
viewsA: I can’t understand my mistake with FOR and Dataframe
Apparently, to occupy the column Densidade you are creating every iteration of for a vector that has only the density calculation value for the element i. Since this vector has a single element, it…
-
0
votes1
answer79
viewsA: compiles code but does not work, just successfully finishes
Dear, I made some changes to your code. They are in tThread. c. For ease, I left your original in tThread_orig. c, and a comparison between the two versions (alias diff) in tThread.c.diff I followed…
-
0
votes2
answers295
viewsA: In bash, what is the difference between a null string and an empty string?
Please consider the shell script in sh: #! /bin/sh aNullString= anEmptyString="" if [ -z ${aNullString} ] ; then echo The string aNullString is empty else echo The string aNullString is not empty fi…
-
0
votes1
answer36
viewsA: RTS/DTR C++ control
Dear Paul, I used serial a lot on Windows 98 -- thousands of years ago, therefore. A lot may have changed. What I can say about that experience is that the manipulation of the Windows serial is…
-
0
votes1
answer111
viewsA: Create mysql table
A primary key uniquely identifies a row in the table. In your case, it would be composed of ID_NF and ID_ITEM. In any database (and Mysql is no exception) there are functions to create primary keys…