Hi,
sorry for posting again, but I used a keyboard combination that
accidently send my post before it was done.
Coming more or less from Python I just started with D. Not a real
programmer, just automating things and looking for a neat
compiled language.
Just to learn, I wrote a function to read CSV-like files (I know
D has its own routine). Since I'm still a bit overwhelmed by the
many complex language features, I'm curious what could I change
to make my code as D'ish as possible?
Thank you for any suggestion,
Thorstein
// Reads CSV-like files with only numeric values in each column
// new_ndv replaces ndv, which is the original no-data-value
double[][]* readNumMatCsv(char[] filePath, int numHeaderLines,
char[] ndv, char[] new_ndv)
{ double[][]* p_numArray;
double[][] numArray;
char[] line;
string noCont = "File content not usable. Quit here.";
string noFile = "Could not read file. Quit here.";
string nonNum = "Found a non-numeric value in data matrix. Quit
here.";
Regex!char re = regex(r"(\n$)");
if(exists(filePath))
{ File f = File(filePath, "r");
if((line = f.readln().dup).length > 0)
{ while (!f.eof())
// 1st replace ndv with new_ndv, 2nd remove all \n, 3rd
check id size of read line >0
{ if((line = replaceAll(f.readln().dup.replace(ndv,
new_ndv), re, "")).length > 0)
// check if all elements of splitted line are numeric
{ foreach(i;split(line,","))
{ if(isNumeric(i) == false)
// otherwise return pointer to empty array
{ writeln(nonNum);
return p_numArray;
}
}
// convert characters to double
if(split(line,",").length > 0)
{ numArray ~= to!(double[])(split(line,","));
}
}
}
// pass reference to pointer
p_numArray = &numArray;
// first line empty -> return pointer to empty array
} else { writeln(noCont); }
// file could not be find
} else { writeln(noFile); }
return p_numArray;
}
