What's equivalent to C#'s select?

[Marc]

On Sunday, 14 January 2018 at 21:38:39 UTC, drug wrote:
> 15.01.2018 00:21, Marc пишет:
>> give a list, how can I select only the elements of a range 
>> according to a condition give by a lamba function?
>> 
>> something like this:
>> 
>>> auto l = myList.select(e => e.id < 300);
>> 
>> it would return a range. Similar to C#'s select:
>> 
>> https://msdn.microsoft.com/en-us/library/bb548891(v=vs.110).aspx
> import std.algorithm : filter;
>
> auto l = myList.filter!(e => e.id < 300);

thanks, can i use it at compile time as well?

>	enum isMutableString(string field) = 
>is(typeof(__traits(getMember, >C, field)) == string);
>	static foreach(field; [FieldNameTuple!C].filter!(f => 
>>isMutableString!(f))) {
>		writeln(field);
>	}

give error:

> Error: variable f cannot be read at compile time