Sam Hu wrote:
I looked up in D2 in std.stdio,std.file,std.cstream and std.stream and try to find
a very simple method which can read from a file once a value other than once an
entire row.I just can not find it maybe this idea is wrong.Say how to simply read
& write key/value pairs to and from a file like this format:
//file "data.dat"
Tommy M 22
where the keys are name,gender and age while the values are Tommy,M ,22.
I found there is methods that can read from a file once an entire row.But is
there a simple method which can read once a value?In C++ one can do like this:
#include <iosteam>
#include <fstream>
using namespace std;
ifstream inData;
inData.open("data.dat");
inData>>name;
inData>>gender;
inData>>age;
cout<<"Info:"<<endl
<<"Name:"<<name<<endl
<<"Gender:"<<gender<<endl
<<"Age:"<<age<<endl;
IN D2 you can use std.file and slurp (cool name, beside)
slurp reads an entire file into an array.
// Load file; each line is an string followed by whitespace , another
//string followed by whitespace and a int.
auto a = slurp!(string, string, int)("data.dat", "%s %s %s");
Now you can go on an play a bit with the new range stuff. (std.range)
Enjoy, Björn
