在一个老外的开源项目中看到的，感觉不错，学习了：

var matrix:{name: string; gitDir: string; }[] = [
    {
        name: "bare repository",
        gitDir: "./test/fixture/bare.git"
    },
    {
        name: "cloned repository",
        gitDir: "./test/fixture/vanilla/.git"
    }
];