Fix display of default value in output

CHANGELOG.md

@@ -3,7 +3,7 @@
 ## Unreleased
 
 - Result object scoring name changed to distance [#143](https://github.com/hypermodeAI/functions-as/pull/143)
-- Collect default values for optional parameters instead of rewriting with supplied_params [#144](https://github.com/hypermodeAI/functions-as/pull/144)
+- Collect default values for optional parameters instead of rewriting with supplied_params [#144](https://github.com/hypermodeAI/functions-as/pull/144) [#146](https://github.com/hypermodeAI/functions-as/pull/146)
 
 ## 2024-07-16 - Version 0.10.3
 

src/transform/src/types.ts

@@ -16,7 +16,9 @@ export class FunctionSignature {
       const param = this.parameters[i]!;
       const defaultValue = param.default;
       params += `${param.name}: ${param.type.name}`;
-      if (defaultValue) params += ` = ${defaultValue}`;
+      if (defaultValue !== undefined) {
+        params += ` = ${JSON.stringify(defaultValue)}`;
+      }
       params += ", ";
     }
     return `${this.name}(${params.endsWith(", ") ? params.slice(0, params.length - 2) : params}): ${this.returnType.name}`;