Array remove, sum, indexOf

app/arrays.js

@@ -2,43 +2,67 @@ exports = typeof window === 'undefined' ? global : window;
 
 exports.arraysAnswers = {
   indexOf: function(arr, item) {
+    for ( var i = 0, j = arr.length; i < j; i++) {
+      if (arr[i] === item){
+        return i;
+      }
+    }
 
+    return -1;
   },
 
   sum: function(arr) {
+    var suma = 0;
 
+    for (var i = 0, j = arr.length; i < j; i++){
+      suma += arr[i];
+    }
+    return suma;
   },
 
   remove: function(arr, item) {
 
+    var remover = [];
+
+    for (var i = 0, j = arr.length; i < j; i++){
+      if (arr[i] !== item){
+        remover.push(arr[i]);
+      }
+  }
+    return remover;
   },
 
   removeWithoutCopy: function(arr, item) {
 
   },
 
   append: function(arr, item) {
-
+    arr.push(item);
+    return arr;
   },
 
   truncate: function(arr) {
-
+    arr.pop();
+    return arr;
   },
 
   prepend: function(arr, item) {
-
+    arr.unshift(item);
+    return(arr);
   },
 
   curtail: function(arr) {
-
+    arr.shift(arr);
+    return(arr);
   },
 
   concat: function(arr1, arr2) {
-
+    return arr1.concat(arr2);
   },
 
   insert: function(arr, item, index) {
-
+    arr.splice(index, 0, item);
+    return(arr);
   },
 
   count: function(arr, item) {

app/async.js

@@ -2,7 +2,11 @@ exports = typeof window === 'undefined' ? global : window;
 
 exports.asyncAnswers = {
   async: function(value) {
-
+    var async = $.Deferred();
+    setTimeout(function(){
+      async.resolve(value);
+    }, 10);
+    return async.promise();
   },
 
   manipulateRemoteData: function(url) {

app/count.js

@@ -2,6 +2,16 @@ exports = typeof window === 'undefined' ? global : window;
 
 exports.countAnswers = {
   count: function (start, end) {
+    var timer;
+    function count () {
+      console.log(start++);
+
+      if(start <= end){
+        timer = setTimeout(count, 100);
+      }
+    }
+
+    count();
 
   }
 };