Initial data commit

Task/100-prisoners/JavaScript/100-prisoners-1.js

@@ -0,0 +1,108 @@
+const _ = require('lodash');
+
+const numPlays = 100000;
+
+const setupSecrets = () => {
+	// setup the drawers with random cards
+	let secrets = [];
+
+	for (let i = 0; i < 100; i++) {
+		secrets.push(i);
+	}
+
+	return _.shuffle(secrets);
+}
+
+const playOptimal = () => {
+	
+	let secrets = setupSecrets();
+	
+
+	// Iterate once per prisoner
+	loop1:
+	for (let p = 0; p < 100; p++) {
+		
+		// whether the prisoner succeedss
+		let success = false;
+		
+		// the drawer number the prisoner chose
+		let choice = p;
+		
+		
+		// The prisoner can choose up to 50 cards
+		loop2:
+		for (let i = 0; i < 50; i++) {
+			
+			// if the card in the drawer that the prisoner chose is his card
+			if (secrets[choice] === p){
+				success = true;
+				break loop2;
+			}
+
+			// the next drawer the prisoner chooses will be the number of the card he has.
+			choice = secrets[choice];
+		
+		}	// each prisoner gets 50 chances
+
+		
+		if (!success) return false;
+
+	} // iterate for each prisoner
+
+	return true;
+}
+
+const playRandom = () => {
+
+	let secrets = setupSecrets();
+
+	// iterate for each prisoner
+	for (let p = 0; p < 100; p++) {
+
+		let choices = setupSecrets();
+		
+		let success = false;
+		
+		for (let i = 0; i < 50; i++) {
+
+			if (choices[i] === p) {
+				success = true;
+				break;
+			}
+		}
+
+		if (!success) return false;
+	}
+
+	return true;
+}
+
+const execOptimal = () => {
+
+	let success = 0;
+	
+	for (let i = 0; i < numPlays; i++) {
+
+		if (playOptimal()) success++;
+			
+	}
+
+	return 100.0 * success / 100000;
+}
+
+const execRandom = () => {
+
+	let success = 0;
+
+	for (let i = 0; i < numPlays; i++) {
+
+		if (playRandom()) success++;
+
+	}
+
+	return 100.0 * success / 100000;
+}
+
+console.log("# of executions: " + numPlays);
+console.log("Optimal Play Success Rate: " + execOptimal());
+console.log("Random Play Success Rate: " + execRandom());