CMSC 12300: Computer Science with Applications III

The University of Chicago, Spring 2020

Code snippets from lectures

• Lecture 2: 1-grams and using less memory
  • Memory-intense dictionary approach
  • O(1)-space approach (better)
• Lecture 4: Top k most frequent
  • Version that sorts all (slower)
  • Version that only tracks k best so far
• Lecture 5-6: Multi-process max
  • Code
• Lecture 8: Word count on MapReduce with mrjob
  • Code
• Lecture 9: MapReduce examples
  • Count all words using MapReduce
  • Average word length using MapReduce
  • Average unique word length using MapReduce
  • Max word length using MapReduce
  • Max length word using MapReduce
• Lectures 10-11: C example
  • Factorial in C
• Lecture 19: Concurrency
  • Threads example 1
  • Threads example 2
• Lecture 21: Synchronization
  • withdraw (mutex example)
  • withdrawer and depositer (condition variable example)