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Dear D-gurus,
being new to D I am trying my first steps and the language is quite intuitive and appealing.
When reading a file and creating a hash for the reocrds I want to get only the most recent ones. For this I need to convert Date/Time-Strings to comparable DateTime-Objects.
The code below works but looks a bit clumsy. Is there a more efficient (shorter) way to accomplish this?
Thanks in advance
// Read lines using foreach.
void main( string args[])
{
auto file = File(args[1]);// Open for reading
auto range = file.byLineCopy();
auto iline=0;
int idxARE=2,idxDC=3,idxTD=0;
string [] records[string];
DateTime getDateTime( string [] row)
{
int d,m,y,ho,mi,se;
row[0].formattedRead!"%d.%d.%d"(d, m, y);
row[1].formattedRead!"%d:%d:%d"(ho, mi, se);
return DateTime(y,m,d,ho,mi,se);
}
foreach (line; range)
{
if (!line.empty)
{
string [] row = line.split(";");
string key = [row[2], row[3]].join("_"); // unique key
if(iline>0) // skip header line
{
if(key in records)
{
// do we have a newer one?
if( getDateTime(row) > getDateTime(records[key]))
{
records[key]=row;
writeln("UPDATE:",key);
}
} else
{
// first one:
records[key]=row;
}
}
iline++;
}
}
writeln( records.length);
writeln("Lines: ",i);
}
