diff --git a/README.md b/README.md
index e22f147..f97236d 100644
--- a/README.md
+++ b/README.md
@@ -264,8 +264,8 @@ Data generation goes with model based composed by generators, the generators can
        faker: 'random.arrayElement(db.users).userId'
            //Chance
        chance: 'integer'
-           //Function
-       function: function (){ return /**/ }
+           //Function that has included index and length, as params
+       function: function (index, length){ return /**/ }
 
        //Array config
        length: 10,
diff --git a/src/lib/Schema.ts b/src/lib/Schema.ts
index 71558ea..adea72d 100644
--- a/src/lib/Schema.ts
+++ b/src/lib/Schema.ts
@@ -71,7 +71,7 @@ export class Schema extends Generator {
 
             let length = fieldArrayCalcLength(fieldConfig, na.length, this)
 
-            let array = Array.from(new Array(length)).map((el, index) => this.generateField(fieldConfig, index))
+            let array = Array.from(new Array(length)).map((el, index) => this.generateField(fieldConfig, index, length))
 
             return array.concat(na)
         } else {
diff --git a/src/lib/tests/Schema.Array.spec.ts b/src/lib/tests/Schema.Array.spec.ts
index 4b6a905..2ebb9f1 100644
--- a/src/lib/tests/Schema.Array.spec.ts
+++ b/src/lib/tests/Schema.Array.spec.ts
@@ -166,6 +166,31 @@ test('Array: It should recognise context in function field', async t => {
     })
 })
 
+test('Array: Function generator should include index and length', async t => {
+
+    let expectedResult = {
+        test: Array.from(new Array(10)).map(( _, index) => ({ index, length: 10 }) )
+    }
+
+    let model = {
+        test: [{
+            function: function(index, length) { // index is provided
+                return {
+                    index,
+                    length
+                }
+            },
+            fixedLength: true,
+            length: 10
+        }]
+    }
+
+    let schema = new Schema('web', model, 1)
+    let data = schema.build()
+
+    t.deepEqual(data[0], expectedResult)
+})
+
 test('Array: It should concat elements', async t => {
     let model = {
         name: {