Re: Appending data to array results in duplicate's.
On Friday, 25 August 2017 at 17:02:53 UTC, Jonathan M Davis wrote:
On Friday, August 25, 2017 16:45:16 Vino.B via
Digitalmars-d-learn wrote:
Hi,
Request your help on the below issue,
Issue : While appending data to a array the data is getting
duplicated.
Program:
import std.file: dirEntries, isFile, SpanMode;
import std.stdio: writeln, writefln;
import std.algorithm: filter, map;
import std.array: array;
import std.typecons: tuple;
string[] Subdata;
void main ()
{
auto dFiles = dirEntries("C:\\Temp\\TEAM",
SpanMode.shallow).filter!(a => a.isFile).map!(a =>
tuple(a.name ,
a.timeCreated)).array;
foreach (d; dFiles)
{
Subdata ~= d[0];
Subdata ~= d[1].toSimpleString;
writeln(Subdata);
}
}
Output:
["C:\\Temp\\TEAM\\test1.pdf", "2017-Aug-24 18:23:00.8946851"]
-
duplicate line
["C:\\Temp\\TEAM\\test1.pdf", "2017-Aug-24 18:23:00.8946851",
"C:\\TempTEAM\\test5.xlsx", "2017-Aug-25 23:38:14.486421"]
You keep printing out the entire array on every iteration of
the loop, so of course, you're going to see stuff output
multiple times. If you did something like
import std.stdio;
void main()
{
int[] arr;
foreach(i; 0 .. 5)
{
arr ~= i * 10;
writeln(arr);
}
}
then you'd get the output
[0]
[0, 10]
[0, 10, 20]
[0, 10, 20, 30]
[0, 10, 20, 30, 40]
whereas if you did
import std.stdio;
void main()
{
int[] arr;
foreach(i; 0 .. 5)
arr ~= i * 10;
writeln(arr);
}
then you'd just get
[0, 10, 20, 30, 40]
- Jonathan M Davis
Hi All,
Thank you very much, that was my mistake. The main idea is to
implement parallelism and now i get only single data as there are
2 files in each of the folders, but it is listing only 1 per
folder.
import std.file: dirEntries, isFile, SpanMode;
import std.stdio: writeln, writefln;
import std.algorithm: filter, map;
import std.array: array;
import std.typecons: tuple;
import std.parallelism;
string[] Subdata;
auto Dirlst = [ "C:\\Temp\\TEAM", "C:\\Temp\\PROD_TEAM"];
string[] Test (string Fs)
{
auto dFiles = dirEntries(Fs, SpanMode.shallow).filter!(a =>
a.isFile).map!(a => tuple(a.name , a.timeCreated)).array;
foreach (d; dFiles)
{ Subdata ~= d[0]; Subdata ~= d[1].toSimpleString; }
return Subdata;
}
void main ()
{
foreach (string Fs; Dirlst[0 .. $])
{
auto TestTask = task(&Test, Fs);
TestTask.executeInNewThread();
auto TestTaskData = TestTask.yieldForce;
writefln("%-63s %.20s", TestTaskData[0], TestTaskData[1]);
}
}
Output:
C:\Temp\TEAM\Test.pdf
2017-Aug-24 18:23:00
C:\Temp\\PROD_TEAM\DND1.pdf
2017-Aug-25 23:38:04
The folder C:\Temp\TEAM contains 2 files and folder
C:\Temp\\PROD_TEAM contain 4 files but it display only 1 file per
folder.
Re: Appending data to array results in duplicate's.
On Friday, August 25, 2017 16:45:16 Vino.B via Digitalmars-d-learn wrote:
> Hi,
>
> Request your help on the below issue,
>
> Issue : While appending data to a array the data is getting
> duplicated.
>
> Program:
> import std.file: dirEntries, isFile, SpanMode;
> import std.stdio: writeln, writefln;
> import std.algorithm: filter, map;
> import std.array: array;
> import std.typecons: tuple;
>
> string[] Subdata;
> void main ()
> {
> auto dFiles = dirEntries("C:\\Temp\\TEAM",
> SpanMode.shallow).filter!(a => a.isFile).map!(a => tuple(a.name ,
> a.timeCreated)).array;
> foreach (d; dFiles)
>{
> Subdata ~= d[0];
> Subdata ~= d[1].toSimpleString;
> writeln(Subdata);
> }
> }
>
> Output:
>
> ["C:\\Temp\\TEAM\\test1.pdf", "2017-Aug-24 18:23:00.8946851"] -
> duplicate line
> ["C:\\Temp\\TEAM\\test1.pdf", "2017-Aug-24 18:23:00.8946851",
> "C:\\TempTEAM\\test5.xlsx", "2017-Aug-25 23:38:14.486421"]
You keep printing out the entire array on every iteration of the loop, so of
course, you're going to see stuff output multiple times. If you did
something like
import std.stdio;
void main()
{
int[] arr;
foreach(i; 0 .. 5)
{
arr ~= i * 10;
writeln(arr);
}
}
then you'd get the output
[0]
[0, 10]
[0, 10, 20]
[0, 10, 20, 30]
[0, 10, 20, 30, 40]
whereas if you did
import std.stdio;
void main()
{
int[] arr;
foreach(i; 0 .. 5)
arr ~= i * 10;
writeln(arr);
}
then you'd just get
[0, 10, 20, 30, 40]
- Jonathan M Davis
Re: Appending data to array results in duplicate's.
On Friday, 25 August 2017 at 16:45:16 UTC, Vino.B wrote:
Hi,
Request your help on the below issue,
Issue : While appending data to a array the data is getting
duplicated.
Program:
import std.file: dirEntries, isFile, SpanMode;
import std.stdio: writeln, writefln;
import std.algorithm: filter, map;
import std.array: array;
import std.typecons: tuple;
string[] Subdata;
void main ()
{
auto dFiles = dirEntries("C:\\Temp\\TEAM",
SpanMode.shallow).filter!(a => a.isFile).map!(a => tuple(a.name
, a.timeCreated)).array;
foreach (d; dFiles)
{
Subdata ~= d[0];
Subdata ~= d[1].toSimpleString;
writeln(Subdata);
}
}
Output:
["C:\\Temp\\TEAM\\test1.pdf", "2017-Aug-24 18:23:00.8946851"]
- duplicate line
["C:\\Temp\\TEAM\\test1.pdf", "2017-Aug-24 18:23:00.8946851",
"C:\\TempTEAM\\test5.xlsx", "2017-Aug-25 23:38:14.486421"]
From,
Vino.B
You are consecutively appending to an array in each loop
iteration step, i.e. you are buffering, and you're printing the
current state of the buffer (all previously buffered elements) in
each loop iteration. I can't see any duplication going on, what
exactly to you wish to accomplish?
Appending data to array results in duplicate's.
Hi,
Request your help on the below issue,
Issue : While appending data to a array the data is getting
duplicated.
Program:
import std.file: dirEntries, isFile, SpanMode;
import std.stdio: writeln, writefln;
import std.algorithm: filter, map;
import std.array: array;
import std.typecons: tuple;
string[] Subdata;
void main ()
{
auto dFiles = dirEntries("C:\\Temp\\TEAM",
SpanMode.shallow).filter!(a => a.isFile).map!(a => tuple(a.name ,
a.timeCreated)).array;
foreach (d; dFiles)
{
Subdata ~= d[0];
Subdata ~= d[1].toSimpleString;
writeln(Subdata);
}
}
Output:
["C:\\Temp\\TEAM\\test1.pdf", "2017-Aug-24 18:23:00.8946851"] -
duplicate line
["C:\\Temp\\TEAM\\test1.pdf", "2017-Aug-24 18:23:00.8946851",
"C:\\TempTEAM\\test5.xlsx", "2017-Aug-25 23:38:14.486421"]
From,
Vino.B
