Re: Separate IP parts
On Saturday, 10 December 2016 at 03:51:34 UTC, brocolis wrote: How do I separate IP parts with dlang? I found this very cool trick, with C++: http://stackoverflow.com/a/5328190 Heh, I'd prefer to use sscanf vs using the streams.
Re: Separate IP parts
On Saturday, 10 December 2016 at 13:25:13 UTC, Nicholas Wilson wrote: On Saturday, 10 December 2016 at 13:21:40 UTC, notna wrote: Those statements need to be inside a function. Feel free to post a working example or, even better, a pull request with one ;)
Re: Separate IP parts
On Saturday, 10 December 2016 at 13:25:13 UTC, Nicholas Wilson wrote: On Saturday, 10 December 2016 at 13:21:40 UTC, notna wrote: On Saturday, 10 December 2016 at 08:03:00 UTC, biozic wrote: [...] Well, you know, that's one of the not so great things about Dlang... you cannot even trust the provided examples, if there are any: [...] Those statements need to be inside a function. I guess that's the reputation complaints here a building up :)
Re: Separate IP parts
On Saturday, 10 December 2016 at 13:21:40 UTC, notna wrote: On Saturday, 10 December 2016 at 08:03:00 UTC, biozic wrote: [...] Well, you know, that's one of the not so great things about Dlang... you cannot even trust the provided examples, if there are any: [...] Those statements need to be inside a function.
Re: Separate IP parts
On Saturday, 10 December 2016 at 08:03:00 UTC, biozic wrote:
This would do the same. I wouldn't say it's a trick.
import std.format : formattedRead;
import std.stdio : writefln;
string ipAddr = "192.168.1.54";
int a, b, c, d;
formattedRead(ipAddr, "%d.%d.%d.%d", &a, &b, &c, &d);
writefln("%s %s %s %s", a, b, c, d);
Well, you know, that's one of the not so great things about
Dlang... you cannot even trust the provided examples, if there
are any:
C:\Temp\D>more formattedReadIps.d
import std.format;
string s = "hello!124:34.5";
string a;
int b;
double c;
formattedRead(s, "%s!%s:%s", &a, &b, &c);
assert(a == "hello" && b == 124 && c == 34.5);
C:\Temp\D>dmd -v formattedReadIps.d
binaryC:\D\dmd2\windows\bin\dmd.exe
version v2.072.1
configC:\D\dmd2\windows\bin\sc.ini
parse formattedReadIps
formattedReadIps.d(6): Error: unexpected ( in declarator
formattedReadIps.d(6): Error: basic type expected, not "%s!%s:%s"
formattedReadIps.d(6): Error: found '"%s!%s:%s"' when expecting
')'
formattedReadIps.d(6): Error: no identifier for declarator
formattedRead(s, _error_)
formattedReadIps.d(6): Error: semicolon expected following
function declaration
formattedReadIps.d(6): Error: declaration expected, not ','
formattedReadIps.d(7): Error: declaration expected, not 'assert'
Re: Separate IP parts
On Saturday, 10 December 2016 at 03:51:34 UTC, brocolis wrote:
How do I separate IP parts with dlang?
I found this very cool trick, with C++:
http://stackoverflow.com/a/5328190
std::string ip ="192.168.1.54";
std::stringstream s(ip);
int a,b,c,d; //to store the 4 ints
char ch; //to temporarily store the '.'
s >> a >> ch >> b >> ch >> c >> ch >> d;
std::cout << a << " " << b << " " << c << " "<< d;
I wonder what's the equivalent D code.
This would do the same. I wouldn't say it's a trick.
import std.format : formattedRead;
import std.stdio : writefln;
string ipAddr = "192.168.1.54";
int a, b, c, d;
formattedRead(ipAddr, "%d.%d.%d.%d", &a, &b, &c, &d);
writefln("%s %s %s %s", a, b, c, d);
Re: Separate IP parts
On Saturday, 10 December 2016 at 03:51:34 UTC, brocolis wrote:
How do I separate IP parts with dlang?
I found this very cool trick, with C++:
http://stackoverflow.com/a/5328190
std::string ip ="192.168.1.54";
std::stringstream s(ip);
int a,b,c,d; //to store the 4 ints
char ch; //to temporarily store the '.'
s >> a >> ch >> b >> ch >> c >> ch >> d;
std::cout << a << " " << b << " " << c << " "<< d;
I wonder what's the equivalent D code.
Not much of a trick, but:
import std.algorithm : splitter, map;
import std.range : take;
import std.conv : to;
import std.array : array;
string ip = "192.168.1.54";
auto parts = ip
.splitter('.')
.take(4)
.map!((a) => a.to!int)
.array;
assert(parts[0] == 192);
assert(parts[1] == 168);
assert(parts[2] == 1);
assert(parts[3] == 54);
Remove the .array to keep it lazy, but then you can't index it
for the values, only walk through them in a foreach.
