带前导零的循环

带前导零的循环：

for i in {01..60}
do
    grep " 04:${i}" request.log | wc -l # 统计4点每分钟有多少个请求
done

同样的脚本用 nodejs 来写：

let shell = require("shelljs");
shell.cd("/db/logs/");
for (let i = 0; i < 60; i++) {
  let ii = i < 10 ? `0${i}` : String(i);
  let time = `04:${ii}`;
  let out = shell.exec(`grep " ${time}" ALL.log | wc -l`, { silent: true });
  shell.echo("-n", time.concat(": "), out.stdout);
}