Robbie's Perl Programming Blog

For those not familiar with "The Weekly Challenge", it is a weekly programming puzzle with two parts, cycling every Sunday. You can find it here: The Weekly Challenge The Weekly Challenge for the week of 2024-11-24 through 2024-11-30 is #297. The tasks for challenge #297 are as follows: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Task 297-1: Contiguous Sub-Arrays Submitted by: Mohammad Sajid Anwar Write a script which, given an array of 1-digit-binary integers (0s and 1s), determines the maximum length of contiguous sub-arrays with equal numbers of 0s and 1s. Example #1: Input: @binary = (1, 0) Output: 2 (1, 0) is the longest contiguous subarray with an equal number of 0 and 1. Example #2: Input: @binary = (0, 1, 0) Output: 2 (1, 0) or (0, 1) is the longest contiguous subarray with an equal number of 0 and 1. Example #3: Input: @binary = (0, 0, 0, 0, 0) Output: 0 Example #4: Input: @binary = (0, 1, 0, 0, 1, 0) Output: 4 (1,0,0,1) I'll ...

For those not familiar with "The Weekly Challenge", it is a weekly programming puzzle with two parts, cycling every Sunday. You can find it here: The Weekly Challenge The Weekly Challenge for the week of 2024-11-17 through 2024-11-23 is #296. The tasks for challenge #296 are as follows: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Task 296-1: String Compression Submitted by: Mohammad Sajid Anwar You are given a string of alphabetic characters, $chars. Write a script to compress the string with run-length encoding, as shown in the examples. A compressed unit can be either a single character or a count followed by a character. BONUS: Write a decompression function. Example 1: Input: $chars = "abbc" Output: "a2bc" Example 2: Input: $chars = "aaabccc" Output: "3ab3c" Example 3: Input: $chars = "abcc" Output: "ab2c" Since this problem involves an input consisting of a string of character...

For those not familiar with "The Weekly Challenge", it is a weekly programming puzzle with two parts, cycling every Sunday. You can find it here: The Weekly Challenge The Weekly Challenge for the week of 2024-11-10 through 2024-11-16 is #295. The tasks for challenge #295 are as follows: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Task 295-1: Word Break Submitted by: Mohammad Sajid Anwar Write a script to return true-or-false depending on whether- or-not a given string can be segmented into a sequence of one-or-more words from a given list of words. Example 1: Input: string = 'weeklychallenge' words = ("challenge", "weekly") Output: true Example 2 Input: string = 'perlrakuperl' words = ("raku", "perl") Output: true Example 3 Input: string = 'sonsanddaughters' words = ("sons", "sand", "daughters") Output: false This problem (like the sec...

For those not familiar with "The Weekly Challenge", it is a weekly programming puzzle with two parts, cycling every Sunday. You can find it here: The Weekly Challenge The Weekly Challenge for the week of 2024-11-03 through 2024-11-09 is #294. The tasks for challenge #294 are as follows: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Task 294-1: Consecutive Sequence Submitted by: Mohammad Sajid Anwar You are given an unsorted array of integers, @ints. Write a script to return the length of the longest consecutive elements sequence. Return -1 if none found. The algorithm must run in O(n) time. Example 1: Input: @ints = (10, 4, 20, 1, 3, 2) Output: 4 The longest consecutive sequence (1, 2, 3, 4). The length of the sequence is 4. Example 2: Input: @ints = (0, 6, 1, 8, 5, 2, 4, 3, 0, 7) Output: 9 Example 3: Input: @ints = (10, 30, 20) Output: -1 I could first sort the array, but that would be O(n*log(n)), not O(n). Faster will be to make a hash and...