Labs 1,2

Exercises/1-pipe.js

@@ -1,5 +1,17 @@
 'use strict';
 
-const pipe = (...fns) => x => null;
+const pipe = (...fns) => {
+  fns.forEach(itm => {
+    if (typeof itm !== 'function') {
+      throw new Error('Functions\'s args must be a function');
+    }
+  });
+  return x => {
+    fns.forEach(fn => {
+      x = fn(x);
+    });
+    return x;
+  };
+};
 
 module.exports = { pipe };

Exercises/2-compose.js

@@ -1,5 +1,35 @@
 'use strict';
 
-const compose = (...fns) => x => null;
+const compose = (...fns) => {
+
+  const events = {};
+  const fnComp = function (x) {
+    try {
+      fns.reverse().forEach(fn => {
+        x = fn(x);
+      });
+      return x;
+    } catch (e) {
+      fnComp.emit('error', e);
+      return;
+    }
+  };
+
+  fnComp.on = function (name, fn) {
+    const event = events[name];
+    if (event) {
+      event.push(fn);
+    } else {
+      events[name] = [fn];
+    }
+  };
+
+  fnComp.emit = function (name, ...data) {
+    const event = events[name];
+    if (event) event.forEach(fn => fn(...data));
+  };
+
+  return fnComp;
+};
 
 module.exports = { compose };