Apply Operations Over Items In A List.md

title	author	date
Apply Operations Over Items In A List	Damian Mingle	05/04/2018

The map() method

# Create a list of patients who have expired
patientDeaths = [82, 913, 902, 90, 83, 189, 334, 267, 44]

# Create a function that updates all patient expirations by adding 100
def updated(x): 
    return x + 100

# Create a list that applies updated() to all elements of patientDeaths
list(map(updated, patientDeaths))

[182, 1013, 1002, 190, 183, 289, 434, 367, 144]

For x in y method

# Create a list of patient deaths
expirations = [482, 93, 392, 920, 813, 199, 374, 237, 244]

# Create an object where we will put the updated patientexpiration numbers
expirationsUpdated = []

# Create a function that for each item in expirations, adds 100
for x in expirations:
    expirationsUpdated.append(x + 100)

# View casualties variables
expirationsUpdated

[582, 193, 492, 1020, 913, 299, 474, 337, 344]

The lambda functions method

# Map the lambda function x() over patient expirations
list(map((lambda x: x + 100), expirations))

[582, 193, 492, 1020, 913, 299, 474, 337, 344]