comments

Author: kevinlu1248

Lesson 3/README.md

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+## Schedule and Outline
+1. [lambda.py](https://github.com/kevinlu1248/ccc_python_lessons/tree/master/Lesson%203/lambda.py): (5 minutes) Introduce lambda function to them
+2. (Remainder of the time) Try doing https://dmoj.ca/problem/ccc18s2 and https://dmoj.ca/problem/ccc16j2 using the input mechanics discussed!
+
+**Note that each of the Python file's teaching materials can be found in the Lesson 1 repository at:**
+https://github.com/kevinlu1248/ccc_python_lessons/tree/master/Lesson%202

Lesson 3/lambda.py

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+# Lambda Introduction
+# Kevin Lu
+
+# WARMUP QUESTION
+# take a string of space-seperated integers '1 2 3 4 5' and return every integer squared
+# try doing this semi-code-golf: try using less but maintaining clarity
+
+# ANSWER (using list comprehension)
+def square(s):
+    return ' '.join([str(int(i) ** 2) for i in s.split()])
+print(square('1 2 3 4 5'))
+
+# an alternative way to do this is to simply use lambda
+def square(s):
+    return ' '.join(map(lambda i: str(int(i) ** 2), s.split()))
+print(square('1 2 3 4 5'))
+
+# So what is lambda?
+# lambda is what's called an anonymous function, which is by definition an unnamed function
+# furthermore, it can also be used as a shorthand
+
+# so lets first look a simple usage of it to subsitute a function
+test