Difference between revisions of "Programming in D for Ruby Programmers"
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*[https://rounin.livejournal.com/24639.html David Oftedal writes on Project Euler problem 61: from Ruby to D] | *[https://rounin.livejournal.com/24639.html David Oftedal writes on Project Euler problem 61: from Ruby to D] | ||
*[https://www.google.de/search?q=ruby&domains=dlang.org&sourceid=google-search&sitesearch=forum.dlang.org&gws_rd=cr&ei=fT0kVdbAD8H6sAHFrYDwBQ#q=ruby+site:forum.dlang.org&domains=dlang.org&start=10 forum posts on Ruby] | *[https://www.google.de/search?q=ruby&domains=dlang.org&sourceid=google-search&sitesearch=forum.dlang.org&gws_rd=cr&ei=fT0kVdbAD8H6sAHFrYDwBQ#q=ruby+site:forum.dlang.org&domains=dlang.org&start=10 forum posts on Ruby] | ||
| + | *[https://wiki.dlang.org/Call_D_from_Ruby_using_FFI Call D Functions Using Ruby FFI] | ||
== Adding methods to existing classes / UFCS == | == Adding methods to existing classes / UFCS == | ||
| Line 33: | Line 34: | ||
void underline(string s) { | void underline(string s) { | ||
import std.stdio : writeln; | import std.stdio : writeln; | ||
| − | import std. | + | import std.range : repeat; |
writeln(s); | writeln(s); | ||
| − | writeln( | + | writeln('='.repeat(s.length)); |
} | } | ||
| − | + | ||
void main() { | void main() { | ||
"Hello, world!".underline(); | "Hello, world!".underline(); | ||
} | } | ||
</source> | </source> | ||
| + | |||
| + | [[Category:Languages versus D]] | ||
Latest revision as of 23:34, 4 August 2016
This page is under community development.
In the meantime, you may find the following links of interest as a Ruby programmer:
- Ruby Programmer shares his excitement about D
- forum discussion of post
- Jacob Carlborg writes on embedding Ruby in a D application
- David Oftedal writes on Project Euler problem 61: from Ruby to D
- forum posts on Ruby
- Call D Functions Using Ruby FFI
Adding methods to existing classes / UFCS
In Ruby, it's possible to add methods to existing classes, even builtin ones:
class String
def underline
puts self
puts "=" * self.length
end
end
"Hello, world!".underline
# prints:
# Hello, world!
# =============
Because it uses a static compilation model, it's not possible to do exactly the same in D. However, D allows calling a free function as if it were a method, which mostly has the same effect from a caller's point of view, and has the additional advantage of not polluting the type's namespace:
void underline(string s) {
import std.stdio : writeln;
import std.range : repeat;
writeln(s);
writeln('='.repeat(s.length));
}
void main() {
"Hello, world!".underline();
}
