Question

我有以下json文件：

{-# LANGUAGE OverloadedStrings #-}

module Main where

import Control.Concurrent (threadDelay)
import qualified Control.Concurrent.Async      as Async
import qualified System.Process.Typed          as Proc
import qualified System.Process                as P
import qualified GHC.IO.Handle                 as H

main :: IO ()
main = do
  print "starting"

  (readEnd, writeEnd) <- P.createPipe

  let p1 = Proc.setStdout (Proc.useHandleClose writeEnd) "echo -n 'foo'"
  let p2 = Proc.setStdin (Proc.useHandleClose readEnd) "base64 -"

  Async.concurrently
    (threadDelay 1000 *> Proc.runProcess_ p2) -- with the delay, it works
    -- (Proc.runProcess_ p2) -- that line will make the program hang forever
    (Proc.runProcess_ p1)

  print "done"

我正在使用jq并想获取“名称”为“ internal.mydomain.com”的对象的“ Id”值。

Answer 1

在名称上使用select()过滤器，并使用以下过滤器获取ID值

jq '.HostedZones[] | select (.Name=="internal.mydomain.com.").Id'

使用jq根据json数组中变量的值选择对象

1 个答案: