Sort_array_by_string_length.md

CodeWars Python Solutions

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Sort array by string length

Write a function that takes an array of strings as an argument and returns a sorted array containing the same strings, ordered from shortest to longest.

For example, if this array were passed as an argument:

["Telescopes", "Glasses", "Eyes", "Monocles"]

Your function would return the following array:

["Eyes", "Glasses", "Monocles", "Telescopes"]

All of the strings in the array passed to your function will be different lengths, so you will not have to decide how to order multiple strings of the same length.

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Given Code

def sort_by_length(arr):
    pass

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Solution 1

def sort_by_length(arr):
    return sorted(arr, key=len)

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Solution 2

def sort_by_length(arr):
    sorted_arr = []
    sorted_arr.append(arr[0])
    for item in arr[1:]:
        for i in range(len(sorted_arr)):
            if len(item) < len(sorted_arr[0]):
                sorted_arr.insert(0, item)
                break
            elif len(item) >= len(sorted_arr[i]):
                sorted_arr.insert(i+1, item)
                break
            else:
                sorted_arr.insert(i-1, item)
                break
    return sorted_arr

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Solution 3

def sort_by_length(arr):
    i = 0
    sorted_arr = []
    while len(sorted_arr) != len(arr):
        for item in arr:
            if len(item) == i:
                sorted_arr.append(item)
        i += 1
    return sorted_arr

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