Retrofit val with scopes, as an example

Author: TotalTechGeek

defaultMethods.js

@@ -205,9 +205,24 @@ const defaultMethods = {
   },
   // Adding this to spec something out, not to merge it.
   val: {
-    method: (args, context) => {
+    method: (args, context, above) => {
       let result = context
-      for (let i = 0; i < args.length; i++) {
+      let start = 0
+      if (Array.isArray(args[0]) && args[0].length === 1) {
+        start++
+        const climb = +Math.abs(args[0][0])
+        let pos = 0
+        for (let i = 0; i < climb; i++) {
+          result = above[pos++]
+          if (i === above.length - 1 && Array.isArray(result)) {
+            above = result
+            result = result[0]
+            pos = 1
+          }
+        }
+      }
+
+      for (let i = start; i < args.length; i++) {
         if (args[i] === null) continue
         if (result === null || result === undefined) return null
         result = result[args[i]]
@@ -553,7 +568,7 @@ function createArrayIterativeMethod (name, useTruthy = false) {
       }
 
       const method = build(mapper, mapState)
-      const aboveArray = method.aboveDetected ? buildState.compile`[{ item: null }, context, above]` : buildState.compile`null`
+      const aboveArray = method.aboveDetected ? buildState.compile`[{ item: null, index: x }, context, above]` : buildState.compile`null`
 
       if (async) {
         if (!isSyncDeep(mapper, buildState.engine, buildState)) {

suites/val.json

@@ -47,5 +47,26 @@
         "rule": { "map": [[1,2,3], { "+": [{ "val": [null] }, 1] }] },
         "data": null,
         "result": [2,3,4]
+    },
+    "Testing out scopes",
+    {
+        "description": "Climb up to get adder",
+        "rule": { "map": [[1,2,3], { "+": [{ "val": null }, { "val": [[-2], "adder"] }] }] },
+        "data": { "adder": 10 },
+        "result": [11,12,13]
+    },
+    {
+        "description": "Climb up to get index",
+        "rule": { "map": [[1,2,3], { "+": [{ "val": null }, { "val": [[-1], "index"] }] }] },
+        "data": { "adder": 10 },
+        "result": [1,3,5]
+    },
+    {
+        "description": "Nested get adder",
+        "rule": {
+            "map": [["Test"], { "map": [[1,2,3], { "+": [{"val": null}, {"val": [[-4], "adder"]}] }]} ]
+        },
+        "data": { "adder": 10 },
+        "result": [[11,12,13]]
     }
 ]