From 563435c6cd1158dfd0a3cc867e881d33bea3d8b5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=A7=D1=83=D0=B1=D0=BA=D0=BE=20=D0=9C=D0=B8=D1=85=D0=B0?=
 =?UTF-8?q?=D0=B9=D0=BB=D0=BE?= <misha.chubko@gmail.com>
Date: Sun, 3 Dec 2023 22:51:40 +0200
Subject: [PATCH] Ik-12 Chubko All labworks from 1 to 2

---
 Exercises/1-pipe.js    | 12 +++++++++++-
 Exercises/2-compose.js | 28 +++++++++++++++++++++++++++-
 2 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/Exercises/1-pipe.js b/Exercises/1-pipe.js
index 14e8909..f084ad4 100644
--- a/Exercises/1-pipe.js
+++ b/Exercises/1-pipe.js
@@ -1,5 +1,15 @@
 'use strict';
 
-const pipe = (...fns) => (x) => null;
+const pipe = (...fns) => x => {
+    
+    for (const fn of fns) {
+      if (typeof fn !== 'function') {
+        throw new Error('All arguments must be functions');
+      }
+    }
+  
+    
+    return fns.reduce((v, fn) => fn(v), x);
+  };
 
 module.exports = { pipe };
diff --git a/Exercises/2-compose.js b/Exercises/2-compose.js
index 8f8b77b..23f5cef 100644
--- a/Exercises/2-compose.js
+++ b/Exercises/2-compose.js
@@ -1,5 +1,31 @@
 'use strict';
 
-const compose = (...fns) => (x) => null;
+const compose = (...fns) => {
+  const eventHandlers = {};
+  const composedFn = (x) => {
+    if (fns.length === 0) return x;
+    let result = x;
+    try {
+      for (let i = fns.length - 1; i >= 0; i--) {
+        result = fns[i](result);
+      }
+    } catch (error) {
+      if (eventHandlers.error) {
+        eventHandlers.error.forEach(handler => handler(error));
+      }
+      return undefined;
+    }
+    return result;
+  };
+
+  composedFn.on = (eventType, handler) => {
+    if (!eventHandlers[eventType]) {
+      eventHandlers[eventType] = [];
+    }
+    eventHandlers[eventType].push(handler);
+  };
+
+  return composedFn;
+};
 
 module.exports = { compose };