From 8b7fbb4f0b855ae4e1cc415484e3b05d0df0b436 Mon Sep 17 00:00:00 2001
From: Maks3105 <newstepms@yandex.ru>
Date: Wed, 1 May 2024 21:56:20 +0700
Subject: [PATCH] Labs tasks 1 - 4

---
 Exercises/1-random.js  |  6 +++---
 Exercises/2-key.js     | 11 ++++++++---
 Exercises/3-ip.js      |  9 +++------
 Exercises/4-methods.js | 29 +++++++++++++----------------
 4 files changed, 27 insertions(+), 28 deletions(-)

diff --git a/Exercises/1-random.js b/Exercises/1-random.js
index ef5ccaf..e2f94d5 100644
--- a/Exercises/1-random.js
+++ b/Exercises/1-random.js
@@ -1,9 +1,9 @@
 'use strict';
 
 const random = (min, max) => {
-  // Generate random Number between from min to max
-  // Use Math.random() and Math.floor()
-  // See documentation at MDN
+  const maxNum = max;
+  const minNum = min;
+  return Math.floor(Math.random() * (maxNum - minNum) + minNum);
 };
 
 module.exports = { random };
diff --git a/Exercises/2-key.js b/Exercises/2-key.js
index ba7e53a..ea8f0af 100644
--- a/Exercises/2-key.js
+++ b/Exercises/2-key.js
@@ -1,9 +1,14 @@
 'use strict';
 
 const generateKey = (length, possible) => {
-  // Generate string of random characters
-  // Use Math.random() and Math.floor()
-  // See documentation at MDN
+  let key = '';
+  const lenStr = possible.length;
+
+  for (let i = 1; i <= length; ++i) {
+    key += possible[Math.floor(Math.random() * (lenStr - 1) + 1)];
+  }
+
+  return key;
 };
 
 module.exports = { generateKey };
diff --git a/Exercises/3-ip.js b/Exercises/3-ip.js
index 1e2c406..502073c 100644
--- a/Exercises/3-ip.js
+++ b/Exercises/3-ip.js
@@ -1,11 +1,8 @@
 '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 = '10.0.0.1') => {
+  const fn = (acc, el) => (acc << 8) + parseInt(el);
+  return ip.split('.').reduce(fn, 0);
 };
 
 module.exports = { ipToInt };
diff --git a/Exercises/4-methods.js b/Exercises/4-methods.js
index c1038e8..4b1fca1 100644
--- a/Exercises/4-methods.js
+++ b/Exercises/4-methods.js
@@ -1,21 +1,18 @@
 '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 arrOfName = [];
+
+  for (const fn in iface) {
+    const typeOfFn = typeof iface[fn];
+
+    if (typeOfFn === 'function') {
+      arrOfName.push([fn, iface[fn].length]);
+    }
+  }
+
+  return arrOfName;
+
 };
 
 module.exports = { methods };