Pull request

Exercises/1-random.js

@@ -1,9 +1,15 @@
 'use strict';
 
+// Generate random Number between from min to max
+// Use Math.random() and Math.floor()
+// See documentation at MDN
+
 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 +1,17 @@
 'use strict';
 
+// Generate string of random characters
+// Use Math.random() and Math.floor()
+// See documentation at MDN
+
 const generateKey = (length, possible) => {
-  // Generate string of random characters
-  // Use Math.random() and Math.floor()
-  // See documentation at MDN
+  let key = '';
+  const max = possible.length;
+  for (let i = 0; i < length; i++) {
+    const randomIndex = Math.floor(Math.random() * max);
+    key += possible[randomIndex];
+  }
+  return key;
 };
 
 module.exports = { generateKey };

Exercises/3-ip.js

@@ -1,11 +1,33 @@
 'use strict';
 
+// 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
+
+// Implementation ipToInt using loop
+// const ipToInt1 = (ip = '127.0.0.1') => {
+//   const ipArray = ip.split('.');
+//   let result = 0, result1;
+//   let count = 3;
+//
+//   for (const item of ipArray) {
+//     result1 = parseInt(item);
+//     for (let i = 1; i <= count; i++) {
+//       result1 <<= 8;
+//     }
+//     count--;
+//     result += result1;
+//   }
+//
+//   return result;
+// };
+
+// Implementation ipToInt using Array.prototype.reduce
 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 ipArray = ip.split('.');
+  return ipArray.reduce((res, curValue) => (res << 8) + parseInt(curValue), 0);
 };
 
 module.exports = { ipToInt };

Exercises/4-methods.js

@@ -1,21 +1,30 @@
 '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]
-  // ]
+// 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 data = [];
+
+  for (const key in iface) {
+    const propertie = iface[key];
+    data.push([propertie.name, propertie.length]);
+  }
+
+  return data;
 };
 
 module.exports = { methods };