added docs

advent-of-code/day11.ts

@@ -0,0 +1,100 @@
+const mock_input: string = `...#......
+.......#..
+#.........
+..........
+......#...
+.#........
+.........#
+..........
+.......#..
+#...#.....`;
+
+
+function replaceGalaxiesWithNumber(input: string): [string, number]{
+    let i = 0;
+    while(input.indexOf("#") !== -1){
+        input = input.replace("#", i);
+        i ++;
+    }
+    return [input, i];
+}
+
+function findEmptyRows(input: string): number[]{
+    let ret = [];
+    let i = 0;
+    for(const row of input.split("\n")){
+        if(row.match(/\d/g) === null ){
+            ret.push(i);
+        }
+        i++;
+    }
+    return ret;
+}
+
+function extractCol(input: string, idx: number): string{
+    let ret = "";
+    const rowLength = input.indexOf("\n") + 1;
+    for(let i = idx; i < input.length; i += rowLength){
+        ret += input.charAt(i)
+    }
+    return ret;
+}
+
+function findEmptyColumns(input: string): number[]{
+    const numberOfCols = input.indexOf("\n");
+    const ret: number[] = [];
+    for(let i = 0; i < numberOfCols - 1; i ++){
+        if(extractCol(input, i).match(/\d/g) === null){
+            ret.push(i);
+        }
+    }
+    return ret;
+}
+
+function getGalaxyCoordinates(universe: string, galaxy: number): [number, number]{
+    const dist = universe.indexOf(galaxy.toString());
+    const numberOfCols = universe.indexOf("\n") + 1;
+    return [dist % numberOfCols, Math.floor(dist / numberOfCols)]
+}
+
+function isBetween(x: number, minOrMax1: number, minOrMax2: number): boolean{
+    if(minOrMax1 == minOrMax2){
+        return false;
+    }
+    if(minOrMax1 > minOrMax2){
+        return isBetween(x, minOrMax2, minOrMax1);
+    }
+    const min_ = minOrMax1;
+    const max_ = minOrMax2;
+    return min_ < x && x < max_;
+}
+
+function distanceBetweenGalaxies(universe: string,
+                                 galaxy1: number,
+                                 galaxy2: number,
+                                 expandedRows: number[],
+                                 expandedColumns: number[]){
+    const [g1x, g1y] = getGalaxyCoordinates(universe, galaxy1);
+    const [g2x, g2y] = getGalaxyCoordinates(universe, galaxy2);
+    expandedRows.filter(x => isBetween(x, g1x, g2x)).length
+    return Math.abs(g1x - g2x)
+        + Math.abs(g1y - g2y)
+        + expandedRows.filter(x => isBetween(x, g1x, g2x)).length
+        + expandedColumns.filter(x => isBetween(x, g1y, g2y)).length
+}
+
+const [universe, nbrGalaxies] = replaceGalaxiesWithNumber(mock_input)
+console.log(universe)
+console.log("ho lala")
+
+const expandedRows = findEmptyRows(universe);
+const expandedColumns = findEmptyColumns(universe);
+console.log(expandedColumns)
+console.log(expandedRows)
+// console.log(distanceBetweenGalaxies(universe, 4, 8, expandedRows, expandedColumns));
+// console.log(distanceBetweenGalaxies(universe, 0, 6, expandedRows, expandedColumns));
+console.log(distanceBetweenGalaxies(universe, 2, 5, expandedRows, expandedColumns));
+// console.log(distanceBetweenGalaxies(universe, 7, 8, expandedRows, expandedColumns));
+
+
+console.log("fenni")