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assignment ... assignment

Author SHA1 Message Date
paulusgaming
63de472207 Solution for assignment4. 2022-12-05 01:00:05 +01:00
4 changed files with 79 additions and 31 deletions
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10
README.md
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@@ -1,5 +1,9 @@
# Advent of Code 2022 - Assignment6_javascript # Advent of Code 2022 - Assignment 4 - javascript
This repository contains answers to the assignments of Advent of Coding 2022 ## Description
The problem for assignment4 deals with overlaps and string parsing. The provided solution for this argument uses substring to parse ranges from file. Furthermore it has a checkbox to trigger whether ranges should fully overlap.
## References ## References
- https://stackoverflow.com/questions/28207610/checking-if-the-characters-in-a-string-are-all-unique - https://www.w3schools.com/jsref/jsref_indexof.asp
- https://www.geeksforgeeks.org/convert-a-string-to-an-integer-in-javascript/#:~:text=In%20JavaScript%20parseInt()%20function,argument%20of%20parseInt()%20function.
- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/substring
- https://medium.com/@raihan_tazdid/overlapping-numbers-in-ranges-5d0f2efc294e

4
index.html
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@@ -8,8 +8,8 @@
<body> <body>
<p>Assignment:</p> <p>Assignment:</p>
<textarea rows="15" cols="50" id="assignment"></textarea> <textarea rows="15" cols="50" id="assignment"></textarea>
<input type="checkbox" id="algorithm" /> <input type="checkbox" id="algorithm"/>
<label for="algorithm">Search for message marker?</label> <label for="algorithm">Full overlap</label>
<p>Answer:</p> <p>Answer:</p>
<div id="answer">Provide input first</div> <div id="answer">Provide input first</div>

86
script.js
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@@ -1,9 +1,10 @@
const ASSIGNMENT = 'assignment'; const ASSIGNMENT = 'assignment';
const ANSWER = 'answer'; const ANSWER = 'answer';
const ALGORITHM_CHECKBOX = 'algorithm'; const ALGORITHM_CHECKBOX = 'algorithm';
const MARKER_DISTINCT_CHARACTERS = 4; const ERROR_MESSAGE_INVALID_RANGE = "Invalid range, ";
const MESSAGE_DISTINCT_CHARACTERS = 14; const COMMA_CHARACTER = ',';
const NEWLINE_CHARACTER = '\n'; const NEWLINE_CHARACTER = '\n';
const RANGE_CHARACTER = '-';
/** /**
* Main function * Main function
@@ -20,8 +21,8 @@ window.onload = function() {
function calculateAnswer(event) { function calculateAnswer(event) {
console.info("Calculating answer for input..."); console.info("Calculating answer for input...");
let assignment = document.getElementById(ASSIGNMENT).value; let assignment = document.getElementById(ASSIGNMENT).value;
let distinctCharacters = (document.getElementById(ALGORITHM_CHECKBOX).checked)? MESSAGE_DISTINCT_CHARACTERS: MARKER_DISTINCT_CHARACTERS; let fullOverlap = document.getElementById(ALGORITHM_CHECKBOX).checked;
let answer = algorithm(assignment, distinctCharacters); let answer = algorithm(assignment, fullOverlap);
document.getElementById(ANSWER).innerText = answer; document.getElementById(ANSWER).innerText = answer;
} }
@@ -29,30 +30,73 @@ function calculateAnswer(event) {
/** /**
* Calculate the answer to assignment. * Calculate the answer to assignment.
* @param assignment the input from the assignment. * @param assignment the input from the assignment.
* @param fullOverlap if input needs to fully overlap.
* @return string the answer * @return string the answer
*/ */
function algorithm(assignment, distinctCharacters) { function algorithm(assignment, fullOverlap) {
let signal = assignment.trim(); let lines = assignment.trim().split(NEWLINE_CHARACTER);
let marker = assignment.substring(0,distinctCharacters); console.info("Linecount:" + lines.length);
for(let i=distinctCharacters; i<signal.length; i++) { let containedPairs = 0;
if(containsDistinctCharacters(marker)) { for(let i=0; i<lines.length; i++) {
console.debug("Found marker after:" + i + " characters"); let error = false;
return "Marker found after processing: " + i + " characters."; let ranges = lines[i].trim();
// Search for separation charactes -,-
let range1CharacterIndex = ranges.indexOf(RANGE_CHARACTER);
let range1EndCharacterIndex = ranges.indexOf(COMMA_CHARACTER);
let range2CharacterIndex = ranges.indexOf(RANGE_CHARACTER, range1CharacterIndex+1);
// Get range substrings
let range1LowerString = ranges.substring(0,range1CharacterIndex);
let range1HigherString = ranges.substring(range1CharacterIndex+1, range1EndCharacterIndex);
let range2LowerString = ranges.substring(range1EndCharacterIndex+1, range2CharacterIndex);
let range2HigherString = ranges.substring(range2CharacterIndex+1);
console.debug("Parsed values: " + range1LowerString + "-" + range1HigherString + "," + range2LowerString + "-" + range2HigherString);
// Parse to int
let range1Lower = parseInt(range1LowerString);
let range1Higher = parseInt(range1HigherString);
let range2Lower = parseInt(range2LowerString);
let range2Higher = parseInt(range2HigherString);
// Validation
if(range1Lower > range1Higher) {
console.error(ERROR_MESSAGE_INVALID_RANGE + range1Lower + "-" + range1Higher + " on line:" + i + " for range1");
error = true;
}
if(range2Lower > range2Higher) {
console.error(ERROR_MESSAGE_INVALID_RANGE + range2Lower + "-" + range2Higher + " on line:" + i + " for range2");
error = true;
} }
marker = marker.substring(1, distinctCharacters) + assignment[i]; if(error) {
continue;
} }
return "No marker found."; // Check for overlap
if(fullOverlap && doesRangeFullyOverlap(range1Lower, range1Higher, range2Lower, range2Higher)
|| !fullOverlap && doesRangeOverlap(range1Lower, range1Higher, range2Lower, range2Higher)) {
console.debug("Found overlapping range:" + range1Lower + "-" + range1Higher + "," + range2Lower + "-" + range2Higher);
containedPairs++;
}
}
return "Fully overlapping timeslot counts: " + containedPairs;
} }
/** function doesRangeFullyOverlap(lower, higher, lower2, higher2) {
* Check if string only contains distinct characters. console.debug("Compare range: " + lower + "-" + higher + " with " + lower2 + "-" + higher2);
* @param String string the string to check if(lower > higher || lower2 > higher2) {
* @return true, if string contains only distinct characters return false;
*/ }
function containsDistinctCharacters(string) { return ((lower <= lower2 && higher >= higher2) || (lower2 <= lower && higher2 >= higher));
console.debug("Check marker: " + string); }
return new Set(string).size == string.length;
function doesRangeOverlap(lower, higher, lower2, higher2) {
console.debug("Compare range: " + lower + "-" + higher + " with " + lower2 + "-" + higher2);
if(lower > higher || lower2 > higher2) {
return false;
}
return higher2 >= lower && lower2 <= higher;
} }