Given a list, we always come across situations in which we require to apply certain function to each element in a list. This can be easily done by applying a loop and performing an operation to each element. But having shorthands to solve this problem is always beneficial and helps to focus more on important aspects of problem. Let’s discuss certain ways in which reverse operation on each string in string list can be performed.
Method #1 : Using list comprehension
This method performs the same task in the background as done by the looping constructs. The advantage this particular method provides is that this is a one liner and also improves code readability.
# Python3 code to demonstrate # Reverse All Strings in String List # using list comprehension # initializing list test_list = ["geeks", "for", "geeks", "is", "best"] # printing original list print ("The original list is : " + str(test_list)) # using list comprehension # Reverse All Strings in String List res = [i[::-1] for i in test_list] # printing result print ("The reversed string list is : " + str(res)) |
The original list is : ['geeks', 'for', 'geeks', 'is', 'best'] The reversed string list is : ['skeeg', 'rof', 'skeeg', 'si', 'tseb']
Method #2 : Using map()
Using map function, one can easily associate an element with the operation one wishes to perform. This is the most elegant way to perform or solve this kind of problems.
# Python3 code to demonstrate # Reverse All Strings in String List # using map() # initializing list test_list = ["geeks", "for", "geeks", "is", "best"] # printing original list print ("The original list is : " + str(test_list)) # Reverse All Strings in String List # using map() reverse = lambda i : i[::-1] res = list(map(reverse, test_list)) # printing result print ("The reversed string list is : " + str(res)) |
The original list is : ['geeks', 'for', 'geeks', 'is', 'best'] The reversed string list is : ['skeeg', 'rof', 'skeeg', 'si', 'tseb']
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