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Fix bug in Cache.set(): self.map[query] is not defined in constructor, replaced with self.lookup.get(query) #1126

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Fix bug in Cache.set(): self.map[query] is not defined in constructor, replaced with self.lookup.get(query) #1126

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2 changes: 1 addition & 1 deletion solutions/system_design/query_cache/query_cache_snippets.py
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Original file line number Diff line number Diff line change
Expand Up @@ -71,7 +71,7 @@ def set(self, results, query):
If the entry is new and the cache is at capacity, removes the oldest entry
before the new entry is added.
"""
node = self.map[query]
node = self.lookup.get(query)
if node is not None:
# Key exists in cache, update the value
node.results = results
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