On 11/9/2010 2:00 PM, Matty Sarro wrote:
I'm working on one of the puzzles on pyschools.com
<http://pyschools.com>, and am trying to figure out if I can make my
solution a bit more elegant.
Definitely
def getSumOfLastDigit(numList):
sumOfDigits=0
for i in range(0, len(numList)):
num=str(numList.pop())
This is an awkward way to iterate through a list ;-)
sumOfDigits+=int(num[-1:])
return sumOfDigits
Write a function: getSumOfLastDigit(numList) that takes in a list of
positive numbers and returns the sum of all the last digit in the list.
*Examples*
>>> getSumOfLastDigit([12, 23, 34])
9
>>> getSumOfLastDigit([2, 3, 4])
9
>>> getSumOfLastDigit([1, 23, 456])
10
# Straightforward version of what you did
def getSumOfLastDigit(numList):
sumOfDigits=0
for i in numList:
sumOfDigits+=int(str(i)[-1:])
return sumOfDigits
print(getSumOfLastDigit([12, 23, 34]),
getSumOfLastDigit([2, 3, 4]),
getSumOfLastDigit([1, 23, 456]) )
# 9 9 10
# Use generator expression with built-in sum function
def getSumOfLastDigit(numList):
return sum(int(str(i)[-1:]) for i in numList)
print(getSumOfLastDigit([12, 23, 34]),
getSumOfLastDigit([2, 3, 4]),
getSumOfLastDigit([1, 23, 456]) )
# 9 9 10
--
Terry Jan Reedy
--
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