firstMapValue util function [refactor]

overlookmotel · Sep 10, 2023 · 5fdd9e2 · 5fdd9e2
1 parent fbfaab8
commit 5fdd9e2
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Showing 2 changed files with 14 additions and 2 deletions.
diff --git a/lib/serialize/blocks.js b/lib/serialize/blocks.js
@@ -15,7 +15,9 @@ const {
 		createRecord, createDependency, createAssignment, createBlock, createScope
 	} = require('./records.js'),
 	{addStrictDirectiveToFunction} = require('./strict.js'),
-	{replaceRecordNode, getNodeWithinWrapperParent, setAddFrom, deleteFirst} = require('./utils.js');
+	{
+		replaceRecordNode, getNodeWithinWrapperParent, setAddFrom, firstMapValue, deleteFirst
+	} = require('./utils.js');
 
 // Exports
 
@@ -788,7 +790,7 @@ function createMissingScopes(block, parentBlock) {
 			possibleParentScopes = possibleScopes;
 		}
 
-		parentScope = possibleParentScopes.values().next().value;
+		parentScope = firstMapValue(possibleParentScopes);
 
 		// If some missing scopes don't exist, create them
 		for (; index < missingBlocks.length; index++) {

diff --git a/lib/serialize/utils.js b/lib/serialize/utils.js
@@ -23,6 +23,7 @@ module.exports = {
 	replaceRecordNode,
 	getNodeWithinWrapperParent,
 	setAddFrom,
+	firstMapValue,
 	deleteItem,
 	deleteFirst
 };
@@ -152,6 +153,15 @@ function setAddFrom(set, from) {
 	return set;
 }
 
+/**
+ * Get first value of Map.
+ * @param {Map} map - Map
+ * @returns {*} - First value of map (or `undefined` if map has no entries)
+ */
+function firstMapValue(map) {
+	return map.values().next().value;
+}
+
 /**
  * Delete first instance of value from array, and return deleted value.
  * @param {Array} arr - Array