Working part one and part two

Didn't like this one: my code is pretty bad, and the instructions
weren't clear at all.

Author: romellem

2016/10/README.md

@@ -1,8 +1,8 @@
 # Answers
 
-|  Part 1  |  Part 2  |
-|----------|----------|
-| ` ` | ` ` |
+| Part 1 |  Part 2 |
+|--------|---------|
+|  `113` | `12803` |
 
 ## --- Day 10: Balance Bots ---
 
@@ -32,3 +32,7 @@ For example, consider the following instructions:
 In the end, output bin `0` contains a value-`5` microchip, output bin `1` contains a value-`2` microchip, and output bin `2` contains a value-`3` microchip. In this configuration, bot number _`2`_ is responsible for comparing value-`5` microchips with value-`2` microchips.
 
 Based on your instructions, _what is the number of the bot_ that is responsible for comparing value-`61` microchips with value-`17` microchips?
+
+## --- Part Two ---
+
+What do you get if you _multiply together the values_ of one chip in each of outputs `0`, `1`, and `2`?

2016/10/bot-comparisons.js

@@ -22,7 +22,7 @@ class BotComparisons {
 
 	parseInstructions(instructions_all = this.instructions) {
 		// Create all bots and outputs, with bots INITialized with their chips
-		const instructions = [];
+		let instructions = [];
 		instructions_all.forEach(instruction => {
 			if (instruction.action === INIT) {
 				const { bot } = instruction.goesTo;
@@ -66,38 +66,51 @@ class BotComparisons {
 		Object.values(this.bots).forEach(chips => sortByValue(chips));
 
 		// Follow instructions
-		instructions.forEach(instruction => {
-			const { from, lowTo, highTo } = instruction;
-			const bots_low = this.bots[from.bot].shift();
-			const bots_high = this.bots[from.bot].pop();
+		while (instructions.length) {
+			const new_instructions = [];
+			for (let instruction of instructions) {
+				const { from, lowTo, highTo } = instruction;
+				if (this.bots[from.bot].length < 2) {
+					new_instructions.push(instruction);
+					continue;
+				}
 
-			if (bots_low == null || bots_high == null) {
-				throw new Error(from.bot + ' compared ' + bots_low + ' and ' + bots_high);cc
-			}
+				const bots_low = this.bots[from.bot].shift();
+				const bots_high = this.bots[from.bot].pop();
+
+				if (bots_low == null || bots_high == null) {
+					throw new Error(from.bot + ' compared ' + bots_low + ' and ' + bots_high);cc
+				}
 
-			this.botsCompared[from.bot].push(bots_low + ',' + bots_high);
+				this.botsCompared[from.bot].push(bots_low + ',' + bots_high);
 
-			// This is too complicated / clever
-			let collection_key = lowTo.bot == null ? 'outputs' : 'bots';
-			const lowTo_key = collection_key === 'outputs' ? 'output' : 'bot';
-			this[collection_key][lowTo[lowTo_key]].push(bots_low);
-			sortByValue(this[collection_key][lowTo[lowTo_key]]);
+				// This is too complicated / clever
+				let collection_key = lowTo.bot == null ? 'outputs' : 'bots';
+				const lowTo_key = collection_key === 'outputs' ? 'output' : 'bot';
+				this[collection_key][lowTo[lowTo_key]].push(bots_low);
+				sortByValue(this[collection_key][lowTo[lowTo_key]]);
 
-			collection_key = highTo.bot == null ? 'outputs' : 'bots';
-			const highTo_key = collection_key === 'outputs' ? 'output' : 'bot';
-			this[collection_key][highTo[highTo_key]].push(bots_high);
-			sortByValue(this[collection_key][highTo[highTo_key]]);
-		});
+				collection_key = highTo.bot == null ? 'outputs' : 'bots';
+				const highTo_key = collection_key === 'outputs' ? 'output' : 'bot';
+				this[collection_key][highTo[highTo_key]].push(bots_high);
+				sortByValue(this[collection_key][highTo[highTo_key]]);
+			}
+
+			instructions = new_instructions;
+		}
 	}
 
 	whichBotCompared61And17() {
-		const bots_who_compared_both = Object.keys(this.comparedBoth61And17);
-		if (bots_who_compared_both.length === 1) {
-			return bots_who_compared_both[0];
-		} else {
-			throw new Error(`More than one bot compared 61 and 17 chips: [${bots_who_compared_both.join(', ')}]`);
+		for (let [bot, compared_arr] of Object.entries(this.botsCompared)) {
+			if (compared_arr.includes('17,61')) {
+				console.log(+bot);
+			}
 		}
 	}
+
+	productOfOutputs(outputs = [0, 1, 2]) {
+		return outputs.map(c => this.outputs[c][0]).reduce((a, b) => a * b, 1);
+	}
 }
 
 module.exports = BotComparisons;

2016/10/part-one.js

@@ -3,4 +3,4 @@ const { input, sampleInputs } = require('./input');
 const BotComparisons = require('./bot-comparisons');
 
 let bot_comparison = new BotComparisons(input);
-console.log(bot_comparison.whichBotCompared61And17());
+bot_comparison.whichBotCompared61And17();

2016/10/part-two.js

@@ -1,2 +1,6 @@
 const assert = require('assert');
 const { input, sampleInputs } = require('./input');
+const BotComparisons = require('./bot-comparisons');
+
+let bot_comparison = new BotComparisons(input);
+console.log(bot_comparison.productOfOutputs());