On Tuesday, 9 January 2018 at 19:05:48 UTC, thedeemon wrote:
On Tuesday, 9 January 2018 at 18:09:58 UTC, Vino wrote:
It is possible to store struct in a array ans use the same
in csvReader
Sure, you can just pass the type of your struct to csvReader:
Array!T1 T1s;
reader(fName, T1s); // pass the array Type as a function
parameter
First you write a template function that takes an array of some
generic type and fills it with records from CSV file:
void readData(DataType)(string fname, ref Array!DataType arr) {
foreach (record; fname.readText.csvReader!DataType('\t')) {
arr ~= record;
}
}
Then you can use it in your main program with different types:
struct S1 { string name; string value; int other; }
struct S2 { int a; string b; }
void main () {
...
if (someCondition) {
Array!S1 arr1;
readData("data1.csv", arr1);
} else {
Array!S2 arr2;
readData("data2.csv", arr2);
}
}
A little advice. Kindly pause and spend an evening reading this
book:
http://ddili.org/ders/d.en/
Currently your code pieces look like a soup produced by someone
who still confuses variables and types, and lacks basic
programming skills. Read the book, don't rush with writing
broken code.
Hi Deemon,
I agree that my code is broken code and I am a Newbie in the
world of programming, the confusion begin when i started writing
the second module, and now i was able to find the issue, and the
real requirement. The requirement is as below.
Program: The below program works.
auto reader(MyStruct) (File fname, auto ref MyStruct st) {
alias ColumnTypes = AliasSeq!(MyStruct);
foreach (record;
fname.byLineCopy().joiner("\n").csvReader!(Tuple!ColumnTypes)(null)) {
writeln(record[0], record[1], record[2]);
}
void main () {
auto fname =
File("C:\\Users\\bheev1\\Desktop\\Current\\Script\\Others\\Table2.csv");
auto Table = baseName(stripExtension(fname));
struct S1 { string Name; string Country; int Age; }
S1 Table1s;
reader(File(fname), join([Table, "1s"]));
}
The requirement is as below
The function reader should store the data in column wise Array
and return the same.
Array!<Type has to be taken from ColumnTypes < Name of the array
has to be taken from the header data as the CSV file has header
Name, Country, Age using records.header)
e.g
Array!string Name; (records.header[0]);
Array!string Country;(records.header[1]);
Array!string Age;(records.header[2]);
and return the above arrays
From,
Vino.B
