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frontend/node_modules/webpack/lib/util/nonNumericOnlyHash.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Ivan Kopeykin @vankop
+*/
+
+"use strict";
+
+const A_CODE = "a".charCodeAt(0);
+
+/**
+ * @param {string} hash hash
+ * @param {number} hashLength hash length
+ * @returns {string} returns hash that has at least one non numeric char
+ */
+module.exports = (hash, hashLength) => {
+	if (hashLength < 1) return "";
+	const slice = hash.slice(0, hashLength);
+	if (/[^\d]/.test(slice)) return slice;
+	return `${String.fromCharCode(
+		A_CODE + (Number.parseInt(hash[0], 10) % 6)
+	)}${slice.slice(1)}`;
+};