Initial data commit

Task/Forest-fire/JavaScript/forest-fire-1.js

@@ -0,0 +1,67 @@
+"use strict"
+
+const _ = require('lodash');
+
+const WIDTH_ARGUMENT_POSITION  = 2;
+const HEIGHT_ARGUMENT_POSITION = 3;
+const TREE_PROBABILITY         = 0.5;
+const NEW_TREE_PROBABILITY     = 0.01;
+const BURN_PROBABILITY         = 0.0001;
+const CONSOLE_RED              = '\x1b[31m';
+const CONSOLE_GREEN            = '\x1b[32m';
+const CONSOLE_COLOR_CLOSE      = '\x1b[91m';
+const CONSOLE_CLEAR            = '\u001B[2J\u001B[0;0f';
+const NEIGHBOURS               = [
+    [-1, -1],
+    [-1,  0],
+    [-1,  1],
+    [ 0, -1],
+    [ 0,  1],
+    [ 1, -1],
+    [ 1,  0],
+    [ 1,  1]
+];
+const PRINT_DECODE             = {
+    ' ': ' ',
+    'T': `${CONSOLE_GREEN}T${CONSOLE_COLOR_CLOSE}`,
+    'B': `${CONSOLE_RED}T${CONSOLE_COLOR_CLOSE}`,
+};
+const CONDITIONS = {
+    'T': (forest, y, x) => Math.random() < BURN_PROBABILITY || burningNeighbour(forest, y, x) ? 'B' : 'T',
+    ' ':  () => Math.random() < NEW_TREE_PROBABILITY ? 'T' : ' ',
+    'B':  () => ' '
+};
+
+const WIDTH  = process.argv[WIDTH_ARGUMENT_POSITION]  || 20;
+const HEIGHT = process.argv[HEIGHT_ARGUMENT_POSITION] || 10;
+
+const update = forest => {
+    return _.map(forest, (c, ci) => {
+        return _.map(c, (r, ri) => {
+            return CONDITIONS[r](forest, ci, ri);
+        });
+    });
+}
+
+const printForest = forest => {
+    process.stdout.write(CONSOLE_CLEAR);
+    _.each(forest, c => {
+        _.each(c, r => {
+            process.stdout.write(PRINT_DECODE[r]);
+        });
+        process.stdout.write('\n');
+    })
+}
+
+const burningNeighbour = (forest, y, x) => {
+    return _(NEIGHBOURS)
+           .map(n => _.isUndefined(forest[y + n[0]]) ? null : forest[y + n[0]][x + n[1]])
+           .any(_.partial(_.isEqual, 'B'));
+};
+
+let forest = _.times(HEIGHT, () => _.times(WIDTH, () => Math.random() < TREE_PROBABILITY ? 'T' : ' '));
+
+setInterval(() => {
+    forest = update(forest);
+    printForest(forest)
+}, 20);