1. LING 408/508: Programming for Linguists Lecture 27 December 9 th

2. Class Inheritance

3. Higher order functions map(function,list) apply function to each member of the list in turn creating a transformed list

4. Higher order functions map(function,list) apply function to each member of the list in turn creating a transformed list inline anonymous function: lambda example: λx.x+x lambda x:x+x

5. Higher order functions reduce(function,list) apply 2-argument function from left to right 1 st argument will be cumulative value 2 nd argument is fresh argument from the list number of cannonballs in pyramid (Wikipedia):

6. Higher order functions filter(function,list) apply function to each member of the list collect those for which the function returns true

7. Standard Deviation Example textbook code seems problematic…

8. Median Median: – average of middle two if even number of elements – middle element of list if odd number of elements

9. Lists Comparisons: – default sort order: cmp(x,y) – returns -1 (x y)

10. Lists create a list of Student objects in variable data

11. Dictionaries Hash table: List: – delimiter: square brackets Dictionary: – delimiter: curly braces

12. Dictionaries

13. Word frequency table program: tokenization

14. Dictionaries Word frequency table program default = 0

15. Dictionaries Word frequency table program

16. Corpus Lead NYTimes article one year ago tomorrow: http://www.nytimes.com/2014/12/10/world/senate-intelligence-committee-cia-torture-report.html

17. Non-ASCII Corpus

18. wc.py for non- ascii ” regular expression convert and insert space for curly quotes, commas, single quotes, and periods not preceded by a capital letter sys.argv list holds command line filename and n most freq words

19. Results sys.argv[1] sys.argv[2] top 2 content words in the article

20. Adminstrivia TCEs are fully online (paper TCEs are history) https://tce.oirps.arizona.edu/TCEOnline