updateArray(sArrayName, aItems) {
		const sArrayAnchor = sArrayName + " = ";
		const iArrayStart = this.sFileContent.indexOf(sArrayAnchor);
		const iArrayEnd = this.sFileContent.indexOf(";", iArrayStart);

		aItems = Array.from(new Set(aItems)).sort();

		this.sFileContent = this.sFileContent.replace(
			this.sFileContent.slice(iArrayStart, iArrayEnd),
			sArrayAnchor + JSON.stringify(aItems, null, "\t").replace(/\n/g, "\n\t"));
	}
Updates the loaded <code>_timezones.js</code> file content.
For a given array <code>sArrayName</code> the array entries are replaced with the new <code>aItems</code>.

@param {string} sArrayName
  The array to be modified
@param {string[]} aItems
  The new array items