Re: what is D's idiom of Python's list.extend(another_list)?

[Ali Çehreli via Digitalmars-d-learn]

On 6/20/21 10:36 PM, mw wrote:
i.e append an array of elements into another array:

```Python
x = [1, 2, 3]
x.extend([4, 5])
print(x)  # [1, 2, 3, 4, 5]
```

Thanks.

There is also std.range.chain, which can visit multiple ranges in 
sequence without copying elements. This is a lifesaver when the arrays 
are very large.

import std.range;
import std.algorithm;

void main() {
  auto a = [ 1, 2, 3 ];
  auto b = [ 4, 5 ];
  auto expected = iota(1, 6);
  assert(chain(a, b).equal(expected));
}

Ranges can be very useful e.g. to sort elements of different random 
access ranges:

import std.range;
import std.algorithm;

void main() {
  auto a = [ 5, 1, 3 ];
  auto b = [ 4, 2 ];
  auto expected = iota(1, 6);

  // This time we sort:
  assert(chain(a, b).sort.equal(expected));

  // What? :)
  assert(a == [ 1, 2, 3]);
  assert(b == [ 4, 5 ]);
}

Ali