Advent of Code 2018: Day 19
IP_REGISTER = Number(INPUT[0][1]);
INSTRUCTIONS = INPUT.slice(1).map(l => [l[0], ...l.slice(1).map(Number)]);
Part 1 What value is left in register 0 when the background process halts?
part1 = { let register = [0, 0, 0, 0, 0, 0]; while (register[IP_REGISTER] < INSTRUCTIONS.length && register[IP_REGISTER] >= 0) { let [currentInstruction, a, b, c] = INSTRUCTIONS[register[IP_REGISTER]]; calculate[currentInstruction](register, a, b, c); register[IP_REGISTER]++; } return register[0]; }
INPUT = `#ip 3 addi 3 16 3 seti 1 8 1 seti 1 3 4 mulr 1 4 2 eqrr 2 5 2 addr 2 3 3 addi 3 1 3 addr 1 0 0 addi 4 1 4 gtrr 4 5 2 addr 3 2 3 seti 2 6 3 addi 1 1 1 gtrr 1 5 2 addr 2 3 3 seti 1 5 3 mulr 3 3 3 addi 5 2 5 mulr 5 5 5 mulr 3 5 5 muli 5 11 5 addi 2 5 2 mulr 2 3 2 addi 2 21 2 addr 5 2 5 addr 3 0 3 seti 0 4 3 setr 3 1 2 mulr 2 3 2 addr 3 2 2 mulr 3 2 2 muli 2 14 2 mulr 2 3 2 addr 5 2 5 seti 0 3 0 seti 0 6 3`.split('\n').map(l => l.split(' '))
calculate = new Object({ 'addr': (r, a, b, c) => r[c] = r[a] + r[b], 'addi': (r, a, b, c) => r[c] = r[a] + b, 'mulr': (r, a, b, c) => r[c] = r[a] * r[b], 'muli': (r, a, b, c) => r[c] = r[a] * b, 'banr': (r, a, b, c) => r[c] = r[a] & r[b], 'bani': (r, a, b, c) => r[c] = r[a] & b, 'borr': (r, a, b, c) => r[c] = r[a] | r[b], 'bori': (r, a, b, c) => r[c] = r[a] | b, 'setr': (r, a, b, c) => r[c] = r[a], 'seti': (r, a, b, c) => r[c] = a, 'gtir': (r, a, b, c) => r[c] = a > r[b] ? 1 : 0, 'gtri': (r, a, b, c) => r[c] = r[a] > b ? 1 : 0, 'gtrr': (r, a, b, c) => r[c] = r[a] > r[b] ? 1 : 0, 'eqir': (r, a, b, c) => r[c] = a === r[b] ? 1 : 0, 'eqri': (r, a, b, c) => r[c] = r[a] === b ? 1 : 0, 'eqrr': (r, a, b, c) => r[c] = r[a] === r[b] ? 1 : 0 })
vegalite = require("@observablehq/vega-lite@0.1")