webinar-for-loops-2022-08-13

# 2022 Aug 13
# WEBINAR: For Loops
# We use loops to repeat actions

# a WHILE loop... btw.. is basically an IF statement
# that repeats as long as its condition is true

# FOR LOOPS are used for repeating actions for every element
# in a container like a list, string, tuple, etc...

# Basic syntax of a for loop
# for ___ in __someContainer__:

myList = ["Agent Scully", "Agent Mulder", "Walter Skinner", "CSM", "Mr. X"]
for item in myList:
    print(item)

myTuple = ("Gilligan", "Castaway002", "red", "crew")
for item in myTuple:
    print(item)

myString = "It was the best of times. It was the worst of times."
# for char in myString:
#     print(char)
for char in myString:
    print(char, end="") # default end "\n"
print() # ... just to get the default "\n"
print("something else I needed to print")


# help(str)
# print(dir(str))

# check for whitespace
for char in myString:
    if not char.isspace():
        print(char, end="")
print()

# for loop over a dict
bestOfXF = {
    "1x00": "Pilot",
    "2x10": "Red Museum",
    "3x04": "Clyde Bruckman's Final Repose",
    "3x12": "War of the Coprophages",
    "3x20": "Jose Chung's From Outer Space",
    "4x05": "The Field Where I Died",
    "5x05": "The Post Modern Prometheus",
    "5x17": "All Souls"
}
for key in bestOfXF: # loop var holds KEY
    value = bestOfXF[key]
    print(f"Check out Episode {key} or '{value}'!") # value is nameOfDict[key]

for k, v in bestOfXF.items():
    print(f"Check out Episode {k}, which is called '{v}'!")  # value is nameOfDict[key]

# the RANGE object and just doing things some # of times
for n in range(0, 7): # [0, 1, 2, 3, 4, 5, 6]
    print(n)

# What I'm interested in INDEX of the VALUES in a list, etc?
for i in range(len(myList)):
    print(f"{i} --> {myList[i]}")


# for i in range(len(myList)):
#     print(f"{myList[i]} fought {myList[i+1]}!") # OUT OF RANGE the last time!

# so... when comparing THIS position i and NEXT position i, adjust range by 1...
for i in range(len(myList)-1):
    print(f"{myList[i]} fought {myList[i+1]}!")