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node_modules/es-abstract/2024/AddValueToKeyedGroup.js

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+'use strict';
+
+var $TypeError = require('es-errors/type');
+
+var callBound = require('call-bound');
+
+var $push = callBound('Array.prototype.push');
+
+var SameValue = require('./SameValue');
+
+var IsArray = require('../helpers/IsArray');
+var every = require('../helpers/every');
+var forEach = require('../helpers/forEach');
+
+var hasOwn = require('hasown');
+
+var isKeyedGroup = function (group) {
+	return hasOwn(group, '[[Key]]')
+        && hasOwn(group, '[[Elements]]')
+        && IsArray(group['[[Elements]]']);
+};
+
+// https://262.ecma-international.org/15.0/#sec-add-value-to-keyed-group
+
+module.exports = function AddValueToKeyedGroup(groups, key, value) {
+	if (!IsArray(groups) || (groups.length > 0 && !every(groups, isKeyedGroup))) {
+		throw new $TypeError('Assertion failed: `groups` must be a List of Records with [[Key]] and [[Elements]]');
+	}
+
+	var matched = 0;
+	forEach(groups, function (g) { // step 1
+		if (SameValue(g['[[Key]]'], key)) { // step 2
+			matched += 1;
+			if (matched > 1) {
+				throw new $TypeError('Assertion failed: Exactly one element of groups meets this criterion'); // step 2.a
+			}
+
+			$push(g['[[Elements]]'], value); // step 2.b
+		}
+	});
+
+	if (matched === 0) {
+		var group = { '[[Key]]': key, '[[Elements]]': [value] }; // step 2
+
+		$push(groups, group); // step 3
+	}
+};