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4 Ways to increase salaries in a list
A common task in software engineering is list manipulation. In this example we convert a list of salaries to a new list of salaries, where each salary is raised by 20%.
We use 4 different methods for this:
- Loop
- Map using a function
- Map using a lambda
- List comprehension
We start with the traditional approach and loop throught the list of salaries, take an element from the list, multiply by 1.2 and append the result to a target list.
1. Loop
salaries = [2000, 2200, 1800, 1900, 2400]
raised_salaries = []
for s in salaries:
raised_salaries.append(s * 1.2)
for s in raised_salaries:
print(s)
Output:
2400.0
2640.0
2160.0
2280.0
2880.0
2. Map with function
salaries = [2000, 2200, 1800, 1900, 2400]
def raise_salary(salary):
return salary * 1.2
raised_salaries = map(raise_salary, salaries)
for s in raised_salaries:
print(s)
Output:
2400.0
2640.0
2160.0
2280.0
2880.0
3. Map with lambda
salaries = [2000, 2200, 1800, 1900, 2400]
raised_salaries = map(lambda salary: salary * 1.2, salaries)
for s in raised_salaries:
print(s)
Output:
2400.0
2640.0
2160.0
2280.0
2880.0
4. List comprehension
salaries = [2000, 2200, 1800, 1900, 2400]
raised_salaries = [salary * 1.2 for salary in salaries]
for s in raised_salaries:
print(s)
Output:
2400.0
2640.0
2160.0
2280.0
2880.0