indicate failure to export functions, rather than return null in top level

problems/01-my-for-each.js

@@ -1,7 +1,8 @@
 /*******************************************************************************
-Write a function `myForEach` that accepts an array and a callback as arguments.
-The function should call the callback on each element of the array, passing in the
-element, index, and array itself. The function does not need to return any value.
+Write a function `myForEach` that accepts an array and a callback as
+arguments.  The function should call the callback on each element of the
+array, passing in the element, index, and array itself. The function
+does not need to return any value.
 
 Do not use the built in Array.forEach.
 
@@ -22,12 +23,12 @@ console.log(test); // ['LAIKA', 'BELKA']
 *******************************************************************************/
 
 function myForEach(array, cb) {
-    // Your code here 
+  // Your code here
 }
 
 /*****************DO NOT MODIFY ANYTHING UNDER THIS  LINE**********************/
 try {
-    module.exports = myForEach;
-} catch(e) {
-    return null;
+  module.exports = myForEach;
+} catch (e) {
+  console.error('failed to export myForEach:', e)
 }

problems/02-my-map.js

@@ -17,12 +17,12 @@ console.log(result2);   // [ 'RUN!', 'FORREST!' ]
 *******************************************************************************/
 
 function myMap(array, cb) {
-    // Your code here 
+  // Your code here
 }
 
 /*****************DO NOT MODIFY ANYTHING UNDER THIS  LINE**********************/
 try {
-    module.exports = myMap;
-} catch(e) {
-    return null;
+  module.exports = myMap;
+} catch (e) {
+  console.error('failed to export myMap:', e);
 }

problems/03-multi-map.js

@@ -22,12 +22,12 @@ console.log(result3); // hi!!!!!
 *******************************************************************************/
 
 function multiMap(val, n, cb) {
-  // Your code here 
+  // Your code here
 }
 
 /*****************DO NOT MODIFY ANYTHING UNDER THIS  LINE**********************/
 try {
   module.exports = multiMap;
 } catch(e) {
-  return null;
+  console.error('failed to export multiMap:', e);
 }

problems/04-my-filter.js

@@ -20,12 +20,12 @@ console.log(result2);      // ['choose', 'words', 'only']
 *******************************************************************************/
 
 function myFilter(array, cb) {
-    // Your code here 
+  // Your code here
 }
 
 /*****************DO NOT MODIFY ANYTHING UNDER THIS  LINE**********************/
 try {
-    module.exports = myFilter;
-} catch(e) {
-    return null;
+  module.exports = myFilter;
+} catch (e) {
+  console.error('failed to export myFilter:', e);
 }

problems/05-selective-map.js

@@ -37,12 +37,12 @@ console.log(selectiveMap([-10, 4, 7, 6, -2, -9], isPositive, square));
 *******************************************************************************/
 
 function selectiveMap(array, selector, mapper) {
-    // Your code here 
+  // Your code here
 }
 
 /*****************DO NOT MODIFY ANYTHING UNDER THIS  LINE**********************/
 try {
-    module.exports = selectiveMap;
-} catch(e) {
-    return null;
+  module.exports = selectiveMap;
+} catch (e) {
+  console.error('failed to export selectiveMap:', e);
 }

problems/06-reject.js

@@ -22,12 +22,12 @@ console.log(reject(['breadth', 'GRAPH', 'depth', 'height'], hasA)); // [ 'depth'
 *******************************************************************************/
 
 function reject(array, cb) {
-  // Your code here 
+  // Your code here
 }
 
 /*****************DO NOT MODIFY ANYTHING UNDER THIS  LINE**********************/
 try {
   module.exports = reject;
-} catch(e) {
-  return null;
+} catch (e) {
+  console.error('failed to export reject:', e);
 }

problems/07-my-some.js

@@ -24,12 +24,12 @@ console.log(result3);   // true
 *******************************************************************************/
 
 function mySome(array, cb) {
-    // Your code here 
+  // Your code here
 }
 
 /*****************DO NOT MODIFY ANYTHING UNDER THIS  LINE**********************/
 try {
-    module.exports = mySome;
-} catch(e) {
-    return null;
+  module.exports = mySome;
+} catch (e) {
+  console.error('failed to export mySome:', e);
 }

problems/08-count.js

@@ -27,12 +27,12 @@ console.log(result4); // 0
 *******************************************************************************/
 
 function count(array, cb) {
-  // Your code here 
+  // Your code here
 }
 
 /*****************DO NOT MODIFY ANYTHING UNDER THIS  LINE**********************/
 try {
   module.exports = count;
 } catch(e) {
-  return null;
+  console.error('failed to export count:', e);
 }

problems/09-chain-map.js

@@ -30,12 +30,12 @@ console.log(chainMap(4, half, square));         // 4
 *******************************************************************************/
 
 function chainMap(val, ...callbacks) {
-  // Your code here 
+  // Your code here
 }
 
 /*****************DO NOT MODIFY ANYTHING UNDER THIS  LINE**********************/
 try {
   module.exports = chainMap;
 } catch(e) {
-  return null;
+  console.error('failed to export chainMap:', e);
 }