Add feature to send single value to lambdas

lib/base.js

@@ -9,12 +9,14 @@ const regex = {
   test: (re, str) => re.test(str),
 };
 
+const jsonpath = require("jsonpath");
+
 const defaultLibraries = [
   R,
   RA,
   // These are libraries we want to name space
   {
-    jq: require("jsonpath"),
+    jp: jsonpath.query.bind(jsonpath),
     saunter: require("saunter"),
     regex,
   },
@@ -170,7 +172,11 @@ const defaultForms = {
   }),
 
   lambda: formWrapper((parentRuntime, lambdaArgs) => {
-    const argNames = lambdaArgs[0];
+    // Allow for a single value to be passed to lambdas
+    const argNames = RA.isArray(lambdaArgs[0])
+      ? lambdaArgs[0]
+      : [lambdaArgs[0]];
+
     // We create a copy of the scope when the lambda is created
     // We don't want this scope to change
     const frozenScope = parentRuntime.scope.copy();

package.json

@@ -1,6 +1,6 @@
 {
   "name": "geneva",
-  "version": "1.4.0",
+  "version": "1.5.0",
   "description": "Make your YAML and JSON dynamic",
   "main": "index.js",
   "scripts": {

test/test_lambda.js

@@ -13,6 +13,31 @@ describe("Lambda", () => {
       ]);
       expect(result).to.equal(5);
     });
+
+    it.only("handles single value arguments", function () {
+      const geneva = new Geneva();
+      const result = geneva.run({
+        "fn:do": [
+          {
+            "fn:def": [
+              "foo",
+              {
+                "fn:lambda": [
+                  "foo",
+                  {
+                    "fn:add": [4, "ref:foo"],
+                  },
+                ],
+              },
+            ],
+          },
+          {
+            "fn:foo": [5],
+          },
+        ],
+      });
+      expect(result).to.equal(9);
+    });
   });
 
   context("when defining a multi-line function", function () {