1 files changed, 40 insertions, 0 deletions
diff --git a/nicla/garbage_filter.py b/nicla/garbage_filter.py
new file mode 100644
index 0000000..3afd2c3
--- /dev/null
+++ b/nicla/garbage_filter.py
@@ -0,0 +1,40 @@
+traffic_light_garbage = list()
+
+"""
+filter garbage
+
+arguments:
+arr -- garbage filter memory list
+val -- input value
+sensitivity -- minimum amount of `val` in `arr` to return `val`
+limit -- max length of `arr`
+
+return value:
+if `arr` contains `sensitivity` or more of any item, that item will be
+returned, else None is returned
+"""
+def garbage_filter(arr, val, sensitivity, limit):
+	if val == None: return None
+	arr[:] = [None]*(limit - len(arr)) + arr
+	arr.pop(0)
+	arr.append(val)
+	if len([x for x in arr if x == val]) >= sensitivity:
+		return val
+	return None
+
+if __name__ == "__main__":
+	inputs = [
+		"red",
+		None,
+		"green",
+		"green",
+		None,
+		"red",
+		"green",
+		"red",
+		"red",
+		None,
+		None
+	]
+	for x in inputs:
+		print(garbage_filter(traffic_light_garbage, x, 3, 4))