Lecture 99:- Print All Subarrays Using RE

Printing all subarrays of an array is a task that doesn't naturally lend itself to regular expressions (RE) since regular expressions are primarily used for pattern matching. However, we can achieve the desired result using a simple nested loop without involving regular expressions. A subarray is a contiguous segment of an array.

Here's a Python code snippet to print all subarrays of a given array:

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def print_all_subarrays(arr):    n = len(arr)    for start in range(n):        for end in range(start, n):            subarray = arr[start:end + 1]            print(subarray) # Test the function arr = [1, 2, 3] print_all_subarrays(arr)

Output:

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[1] [1, 2] [1, 2, 3] [2] [2, 3] [3]

In this code, we define the function print_all_subarrays(arr) that takes an array arr as input. We use two nested loops to iterate over all possible start and end indices of the subarrays. For each pair of start and end indices, we slice the original array to obtain the corresponding subarray and then print it.

Regular expressions are powerful for pattern matching tasks but not suitable for iterating through all possible combinations of elements in an array, which is required to print all subarrays. As a result, we use a standard nested loop approach instead.