From 1f84479a803dc3219d11c8082d60133b4531f53f Mon Sep 17 00:00:00 2001
From: perro <hi@perrotuerto.blog>
Date: Fri, 3 Mar 2023 11:59:57 -0800
Subject: [PATCH] Ejercicio 11

---
 exercises/ex09/sed  | 34 ++++++++++------------------------
 exercises/ex11/cut  |  1 +
 exercises/ex11/sed  |  1 +
 exercises/ex11/sort |  1 +
 exercises/ex11/uniq | 37 +++++++++++++++++++++++++++++++++++++
 5 files changed, 50 insertions(+), 24 deletions(-)
 create mode 120000 exercises/ex11/cut
 create mode 120000 exercises/ex11/sed
 create mode 120000 exercises/ex11/sort
 create mode 100755 exercises/ex11/uniq

diff --git a/exercises/ex09/sed b/exercises/ex09/sed
index 27c99c7..3ff8065 100755
--- a/exercises/ex09/sed
+++ b/exercises/ex09/sed
@@ -8,34 +8,20 @@ import argparse
 from pathlib import Path
 
 
-def check(expression, exp):
-    error = False
-    if (
-        expression[-1] not in "/g"
-        or exp[0] not in "s"
-        or len(exp) not in range(3, 5)
-        or (expression[-1] in "g" and len(exp) != 4)
-        or (expression[-1] in "/" and len(exp) == 4)
-    ):
-        error = True
-    if error:
+def parse(expression):
+    try:
+        match = re.fullmatch(r's/(.*)/(.*)/(g{0,1})', expression)
+        count = 0 if match.group(3) == "g" else 1
+        return {
+            "rgx": re.compile(match.group(1)),
+            "rep": match.group(2),
+            "n": count
+        }
+    except Exception:
         print(f"sed: expresión «{expression}» inválida")
         sys.exit(1)
 
 
-def parse(expression):
-    count = 0
-    exp = list(filter(None, expression.split("/")))
-    check(expression, exp)
-    if len(exp) == 3:
-        count = 1
-    return {
-        "rgx": re.compile(exp[1]),
-        "rep": exp[2],
-        "n": count,
-    }
-
-
 parser = argparse.ArgumentParser()
 parser.add_argument("stream", default=sys.stdin, nargs="*")
 parser.add_argument(
diff --git a/exercises/ex11/cut b/exercises/ex11/cut
new file mode 120000
index 0000000..5bd2716
--- /dev/null
+++ b/exercises/ex11/cut
@@ -0,0 +1 @@
+../ex08/cut
\ No newline at end of file
diff --git a/exercises/ex11/sed b/exercises/ex11/sed
new file mode 120000
index 0000000..5bca51d
--- /dev/null
+++ b/exercises/ex11/sed
@@ -0,0 +1 @@
+../ex09/sed
\ No newline at end of file
diff --git a/exercises/ex11/sort b/exercises/ex11/sort
new file mode 120000
index 0000000..d12f599
--- /dev/null
+++ b/exercises/ex11/sort
@@ -0,0 +1 @@
+../ex10/sort
\ No newline at end of file
diff --git a/exercises/ex11/uniq b/exercises/ex11/uniq
new file mode 100755
index 0000000..d11b227
--- /dev/null
+++ b/exercises/ex11/uniq
@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+# Exercise 11
+# uniq command
+
+import sys
+import argparse
+from pathlib import Path
+
+parser = argparse.ArgumentParser()
+parser.add_argument("stream", default=sys.stdin, nargs="*")
+parser.add_argument("-i", "--ignore-case", action="store_true")
+parser.add_argument("-c", "--count", action="store_true")
+args = parser.parse_args()
+lines = []
+counter = None
+
+for stream in args.stream:
+    if isinstance(args.stream, list):
+        for line in Path(stream).open().readlines():
+            lines.append(line.rstrip())
+    else:
+        lines.append(stream.strip())
+
+if args.ignore_case:
+    lines = list(map(lambda l: l.lower(), lines))
+
+if args.count:
+    counter = {}
+    for line in lines:
+        counter.setdefault(line, 0)
+        counter[line] += 1
+
+lines = sorted(set(lines))
+
+for line in lines:
+    msg = line if counter is None else f"{counter[line]} {line}"
+    print(msg)