CMSC 12300: Computer Science with Applications III

The University of Chicago, Spring 2022

Code snippets from lectures

• Lecture 3: 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: Multi-process max
  • Code
• Lectures 7-8: Word count on MapReduce with mrjob
  • Code
• Lecture 8: MapReduce examples
  • Count all words using MapReduce
  • Average word length using MapReduce
• Lecture 9: More MapReduce examples
  • Average unique word length using MapReduce
  • Max word length using MapReduce
  • Max length word using MapReduce
• Lectures 10-11: C example
  • Factorial in C
• Lectures 12-13: Leap Year (C conditionals)
  • Leap year versions in C
• Lectures 13-14: Loops in C
  • Factorial as while loop, two versions in C
  • Factorial as for loop
• Lectures 14-15: Arrays in C
  • Summing an Array
  • Squaring an Array "Destructively"
  • Generating a New Array of Squares
• Lecture 16: Strings in C
  • emphasize function
• Lecture 16: Multidimensional arrays in C
  • Printing 2-D array example
• Lecture 17: structs in C
  • Midpoint function