fix: have stable n-grams picked once per pass

..so that the detection is performed on the same set for every lang

da_detector.py

@@ -9,6 +9,7 @@ class da_detector:
 	def __init__(self, langs_to_check: list = ["sk", "en"]):
 		# langs to check
 		# to be picked from ["cz", "sk", "de", "en", "fr"]
+		self.da_ngrams = []
 
 		if not isinstance(langs_to_check, list):
 			raise TypeError("not a list, bailing")
@@ -134,11 +135,13 @@ class da_detector:
 
 		probabs = []
 		try:
+			# only pick n-grams once per pass
+			self.da_ngrams = self.pick_ngrams(what_grams, how_many, txt)
 			for lang in langs:
 				probabs.append(
 					self.gimme_probabilities(
 						lang,
-						self.pick_ngrams(what_grams, how_many, txt)
+						self.da_ngrams
 					)
 				)
 		except Exception as e: