lab3

Exercises/1-random.js

@@ -1,9 +1,11 @@
 'use strict';
 
 const random = (min, max) => {
-  // Generate random Number between from min to max
-  // Use Math.random() and Math.floor()
-  // See documentation at MDN
+  if (max === undefined) {
+    max = min;
+    min = 0;
+  }
+  return Math.floor(Math.random() * (max - min + 1) + min);
 };
 
 module.exports = { random };

Exercises/2-key.js

@@ -1,9 +1,12 @@
 'use strict';
 
 const generateKey = (length, possible) => {
-  // Generate string of random characters
-  // Use Math.random() and Math.floor()
-  // See documentation at MDN
+  let key = '';
+  for (let i = 1; i <= length; i++) {
+    const randomCharIndex = Math.floor(Math.random() * possible.length);
+    key += possible[randomCharIndex];
+  }
+  return key;
 };
 
 module.exports = { generateKey };

Exercises/3-ip.js

@@ -1,11 +1,9 @@
 'use strict';
 
-const ipToInt = (ip = '127.0.0.1') => {
-  // Parse ip address as string, for example '10.0.0.1'
-  // to ['10', '0', '0', '1'] to [10, 0, 0, 1]
-  // and convert to Number value 167772161 with bitwise shift
-  // (10 << 8 << 8 << 8) + (0 << 8 << 8) + (0 << 8) + 1 === 167772161
-  // Use Array.prototype.reduce of for loop
-};
+const ipToInt = (ip = '127.0.0.1') => ip
+  .split('.').reverse().reduce((sum, cur, i) => {
+    cur = parseInt(cur, 10);
+    return sum += cur << (8 * i);
+  }, 0);
 
 module.exports = { ipToInt };

Exercises/4-methods.js

@@ -1,21 +1,12 @@
 'use strict';
 
-const methods = iface => {
-  // Introspect all properties of iface object and
-  // extract function names and number of arguments
-  // For example: {
-  //   m1: x => [x],
-  //   m2: function (x, y) {
-  //     return [x, y];
-  //   },
-  //   m3(x, y, z) {
-  //     return [x, y, z];
-  //   }
-  // will return: [
-  //   ['m1', 1],
-  //   ['m2', 2],
-  //   ['m3', 3]
-  // ]
+const methods = (iface) => {
+  const arrayExit = [];
+  for (const methodName in iface) {
+    const method = iface[methodName];
+    arrayExit.push([`${methodName}`, method.length]);
+  }
+  return arrayExit;
 };
 
 module.exports = { methods };