js

README.md

@@ -85,3 +85,4 @@ Copyright © 2012-2016 Rebecca Murphey with many thanks to several
 <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-sa/4.0/88x31.png" /></a>
 
 This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike 4.0 International License</a>.
+# js-assesement

app/arrays.js

@@ -1,59 +1,93 @@
 exports = typeof window === 'undefined' ? global : window;
 
 exports.arraysAnswers = {
-  indexOf: function(arr, item) {
-
+  indexOf: function (arr, item) {
+    for (var i = 0, b = arr.length; i < b; i++) {
+      if (arr[i] === item) {
+        return i;
+      }
+    }
+    return -1;
   },
 
-  sum: function(arr) {
+  sum: function (arr) {
+    let sum = 0;
 
+    for (var i = 0, b = arr.length; i < b; i++) {
+      sum += arr[i];
+    }
+    return sum;
   },
 
-  remove: function(arr, item) {
+  remove: function (arr, item) {
 
   },
 
-  removeWithoutCopy: function(arr, item) {
+  removeWithoutCopy: function (arr, item) {
 
   },
 
-  append: function(arr, item) {
-
+  append: function (arr, item) {
+    arr.push(item)
+    return arr
   },
 
-  truncate: function(arr) {
-
+  truncate: function (arr) {
+    arr.pop()
+    return arr
   },
 
-  prepend: function(arr, item) {
-
+  prepend: function (arr, item) {
+    arr.unshift(item)
+    return arr
   },
 
-  curtail: function(arr) {
-
+  curtail: function (arr) {
+    arr.unshift()
+    return arr
   },
 
-  concat: function(arr1, arr2) {
-
+  concat: function (arr1, arr2) {
+    return arr1.concat(arr2)
   },
 
-  insert: function(arr, item, index) {
-
+  insert: function (arr, item, index) {
+    arr.splice(index,0,item)
+    return arr
   },
 
-  count: function(arr, item) {
-
+  count: function (arr, item) {
+    let value = 0
+
+    for (var i = 0, b = arr.length; i < b; i++) {
+      if (arr[i] === item) {
+        value++
+      }
+    }
+    return value
   },
 
-  duplicates: function(arr) {
+  duplicates: function (arr) {
 
   },
 
-  square: function(arr) {
+  square: function (arr) {
+    let sq = []
 
+    for (var i = 0, b = arr.length; i < b; i++) {
+      sq.push(arr[i]*arr[i])
+    }
+    return sq
   },
 
-  findAllOccurrences: function(arr, target) {
+  findAllOccurrences: function (arr, target) {
+    let dupes = []
 
+    for (var i = 0, b = arr.length; i < b; i++) {
+      if (arr[i]===target) {
+        dupes.push(i)
+      }
+    }
+    return dupes
   }
 };

arrays.js

@@ -0,0 +1,93 @@
+exports = typeof window === 'undefined' ? global : window;
+
+exports.arraysAnswers = {
+  indexOf: function (arr, item) {
+    for (var i = 0, b = arr.length; i < b; i++) {
+      if (arr[i] === item) {
+        return i;
+      }
+    }
+    return -1;
+  },
+
+  sum: function (arr) {
+    let sum = 0;
+
+    for (var i = 0, b = arr.length; i < b; i++) {
+      sum += arr[i];
+    }
+    return sum;
+  },
+
+  remove: function (arr, item) {
+
+  },
+
+  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.unshift()
+    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) {
+    let value = 0
+
+    for (var i = 0, b = arr.length; i < b; i++) {
+      if (arr[i] === item) {
+        value++
+      }
+    }
+    return value
+  },
+
+  duplicates: function (arr) {
+
+  },
+
+  square: function (arr) {
+    let sq = []
+
+    for (var i = 0, b = arr.length; i < b; i++) {
+      sq.push(arr[i]*arr[i])
+    }
+    return sq
+  },
+
+  findAllOccurrences: function (arr, target) {
+    let dupes = []
+
+    for (var i = 0, b = arr.length; i < b; i++) {
+      if (arr[i]===target) {
+        dupes.push(i)
+      }
+    }
+    return dupes
+  }
+};