diff --git a/.archive/coro.py b/.archive/coro.py
deleted file mode 100644
index 2e0b2e7..0000000
--- a/.archive/coro.py
+++ /dev/null
@@ -1,22 +0,0 @@
-import ipaddress as ip
-import typing
-import asyncio
-
-from findssh.coro import is_port_open
-
-
-async def as_completed(
-    net: ip.IPv4Network, port: int, service: str, timeout: float
-) -> typing.List[typing.Tuple[ip.IPv4Address, str]]:
-    futures = [is_port_open(host, port, service) for host in net.hosts()]
-    hosts = []
-    for future in asyncio.as_completed(futures, timeout=timeout):
-        try:
-            res = await future
-        except asyncio.TimeoutError:
-            continue
-
-        if res is not None:
-            print(*res)
-            hosts.append(res)
-    return hosts
diff --git a/.archive/findssh.m b/.archive/findssh.m
index f7acede..b9b2fb3 100644
--- a/.archive/findssh.m
+++ b/.archive/findssh.m
@@ -7,15 +7,11 @@
 % example (find all SSH servers on IPv4 subnet on Port 22):
 %   findssh()
 
-assert(~verLessThan('matlab', '8.4'), 'Matlab >= R2014b required')
-
-if nargin < 1, port=22; end
-if nargin < 2, service = ''; end
-if nargin < 3, timeout = 0.1; end
-
-validateattributes(port, {'numeric'}, {'integer', 'nonnegative'})
-validateattributes(service, {'string', 'char'}, {'scalartext'})
-validateattributes(timeout, {'numeric'}, {'real', 'nonnegative'})
+arguments
+    port (1,1) {mustBeInteger, mustBePositive} = 22
+    service (1,1) string = ""
+    timeout (1,1) {mustBeReal, mustBePositive} = 0.1
+end
 
 net = py.findssh.address2net(py.findssh.get_lan_ip());
 
diff --git a/src/findssh/coro.py b/src/findssh/coro.py
index 0c3db26..ac748da 100644
--- a/src/findssh/coro.py
+++ b/src/findssh/coro.py
@@ -25,9 +25,8 @@ async def get_hosts(
     """
 
     hosts = []
-    for h in asyncio.as_completed(
-        [waiter(host, port, service, timeout) for host in net.hosts()]
-    ):
+    futures = [waiter(host, port, service, timeout) for host in net.hosts()]
+    for h in asyncio.as_completed(futures):
         if host := await h:
             print(host)
             hosts.append(host)