digitalmars.D.learn - Ranges: How to take N last of elements of range
- Ur nuz (45/45) Dec 25 2015 How to take N last of elements of range?
- drug (6/22) Dec 25 2015 You can do following http://dpaste.dzfl.pl/41c57f89a5a0
- Ur nuz (2/10) Dec 25 2015 Thanks for reply. This is useful
- Jakob Ovrum (2/12) Dec 27 2015 https://github.com/D-Programming-Language/phobos/pull/3855
How to take N last of elements of range? I have tried the following example in my code, but it says that it deprecated. What is the other possible way? static struct LogerInfo { string func; int line; void write(T...)(T data) { import std.stdio; import std.algorithm: splitter; import std.range: retro; import std.range: take; import std.array: array; string shortFuncName = func.splitter(".").retro.take(2).retro.array; writeln( shortFuncName, "[", line, "]: ", data ); } } It says the following: /usr/include/dmd/phobos/std/range/package.d(224): Deprecation: function std.algorithm.iteration.splitter!("a == b", string, string).splitter.Result.popBack is deprecated - splitter!(Range, Range) cannot be iterated backwards (due to separator overlap). /usr/include/dmd/phobos/std/range/package.d(223): Deprecation: function std.algorithm.iteration.splitter!("a == b", string, string).splitter.Result.back is deprecated - splitter!(Range, Range) cannot be iterated backwards (due to separator overlap). declarative/parser.d(68): Error: template std.range.retro cannot deduce function from argument types !()(Take!(Result!())), candidates are: /usr/include/dmd/phobos/std/range/package.d(188): std.range.retro(Range)(Range r) if (isBidirectionalRange!(Unqual!Range)) declarative/parser.d(130): Error: template instance declarative.parser.Parser!(TextForwardRange!(string, LocationConfig(true, true, true, true, true))).Parser.LogerInfo.write!(string, string) error instantiating declarative/interpreter_test.d(11): instantiated from here: Parser!(TextForwardRange!(string, LocationConfig(true, true, true, true, true))) Failed: ["dmd", "-v", "-o-", "declarative/interpreter_test.d", "-Ideclarative"]
Dec 25 2015
25.12.2015 17:13, Ur nuz пишет:static struct LogerInfo { string func; int line; void write(T...)(T data) { import std.stdio; import std.algorithm: splitter; import std.range: retro; import std.range: take; import std.array: array; string shortFuncName = func.splitter(".").retro.take(2).retro.array; writeln( shortFuncName, "[", line, "]: ", data ); } }You can do following http://dpaste.dzfl.pl/41c57f89a5a0 The reason of compile error is your using a range as a separator, change it to single symbol and it works. Also I used 'array' after 'take' to make range bidirectional to let next 'retro' works. And 'join' joins result to string with '.' as a separator.
Dec 25 2015
On Friday, 25 December 2015 at 20:06:04 UTC, drug wrote:25.12.2015 17:13, Ur nuz пишет:Thanks for reply. This is useful[...]You can do following http://dpaste.dzfl.pl/41c57f89a5a0 The reason of compile error is your using a range as a separator, change it to single symbol and it works. Also I used 'array' after 'take' to make range bidirectional to let next 'retro' works. And 'join' joins result to string with '.' as a separator.
Dec 25 2015
On Saturday, 26 December 2015 at 05:31:59 UTC, Ur nuz wrote:On Friday, 25 December 2015 at 20:06:04 UTC, drug wrote:https://github.com/D-Programming-Language/phobos/pull/385525.12.2015 17:13, Ur nuz пишет:Thanks for reply. This is useful[...]You can do following http://dpaste.dzfl.pl/41c57f89a5a0 The reason of compile error is your using a range as a separator, change it to single symbol and it works. Also I used 'array' after 'take' to make range bidirectional to let next 'retro' works. And 'join' joins result to string with '.' as a separator.
Dec 27 2015