On Wednesday, 26 April 2017 at 05:21:32 UTC, Jonathan M Davis wrote:
On Wednesday, April 26, 2017 04:02:12 Suliman via Digitalmars-d-learn wrote:
I tried to do:

writeln(DateTime.toISOExtString(DateTime.fromSimpleString(point[1].coerce!
string)));

But got error:

Error: function std.datetime.DateTime.toISOExtString () const is
not callable using argument types (DateTime)
Error: function database.Database.getSingleTrackInfo no return
exp; or assert(0); at end of function

toISOExtString is a normal member function on DateTime, not a static member function. If point[1].coerce!string is giving you a string in Boost's "simple time" format (e.g. "2016-Jan-04 12:19:17"), then DateTime.fromSimpleString(point[1].coerce!string) will give you a DateTime. Then if you called toISOExtString() on that, e.g.

DateTime dt = DateTime.fromSimpleString(point[1].coerce!string);
string str = dt.toISOExtString();

then the string would be in the ISO extended format (e.g. "2016-01-04T12:19:17"). If you then wanted that in the format "2016-01-04 12:19:17", then you could just replace the 'T' with ' ', e.g.

DateTime dt = DateTime.fromSimpleString(point[1].coerce!string);
string str = dt.toISOExtString().replace("T", " ");

And if you have "2016-01-04 12:19:17", and you want to convert that to the Boost simple time format, you could do

DateTime dt = DateTime.fromISOExtString(str.replace(" ", "T"))
auto simpleStr = dt.toSimpleString();

Hopefully, that helps.

- Jonathan M Davis

Thanks! That's work!

But why I can't do it in single line like:
string dt = DateTime.toISOExtString(DateTime.fromSimpleString(point[1].coerce!string)); "Error: function std.datetime.DateTime.toISOExtString () const is not callable using argument types (DateTime)"

And should do:

DateTime dt = DateTime.fromSimpleString(point[1].coerce!string);
string str = dt.toISOExtString();

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