44 lines
1.6 KiB
Python
44 lines
1.6 KiB
Python
# Abgabe - PaginationHelper Aufgabe von Codewars
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# Link dazu: https://www.codewars.com/kata/54bf1c2cd5b56cc47f0007a1
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# Leart Ramushi
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# TODO: complete this class
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import math
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class PaginationHelper:
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# The constructor takes in an array of items and an integer indicating
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# how many items fit within a single page
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def __init__(self, collection, items_per_page):
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self.collection = collection
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self.items_per_page = items_per_page
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# returns the number of items within the entire collection
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def item_count(self):
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return len(self.collection)
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# returns the number of pages
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def page_count(self):
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return math.ceil(len(self.collection) / self.items_per_page)
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# returns the number of items on the given page. page_index is zero based
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# this method should return -1 for page_index values that are out of range
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def page_item_count(self, page_index):
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if page_index < 0 or page_index >= self.page_count():
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return -1
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if page_index == self.page_count() - 1:
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rest = len(self.collection) % self.items_per_page
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if rest == 0:
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return self.items_per_page
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else:
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return rest
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return self.items_per_page
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# determines what page an item at the given index is on. Zero based indexes.
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# this method should return -1 for item_index values that are out of range
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def page_index(self, item_index):
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if item_index < 0 or item_index >= len(self.collection):
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return -1
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return item_index // self.items_per_page
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