Getting variable out of double function












0















There was already post with same question, but none of answers was doing what i suppose to do. So here is code example:



function findIP(onNewIP) {
var myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
var pc = new myPeerConnection({
iceServers: [{
urls: "stun:stun.l.google.com:19302"
}]
}),
noop = function() {},
localIPs = {},
ipRegex = /([0-9]{1,3}(.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g,
key;

function ipIterate(ip) {
if (!localIPs[ip]) onNewIP(ip);
localIPs[ip] = true;
}

pc.createDataChannel("");

pc.createOffer(function(sdp) {
sdp.sdp.split('n').forEach(function(line) {
if (line.indexOf('candidate') < 0) return;
line.match(ipRegex).forEach(ipIterate);
});
pc.setLocalDescription(sdp, noop, noop);
}, noop);

pc.onicecandidate = function(ice) {
if (!ice || !ice.candidate || !ice.candidate.candidate || !ice.candidate.candidate.match(ipRegex)) return;
ice.candidate.candidate.match(ipRegex).forEach(ipIterate);
};
}


That code is JS function, and after is goes usage:



function addIP(ip) {
var li = document.createElement('li');
li.textContent = ip;
document.getElementById("IPLeak").appendChild(li);
}

findIP(addIP);


So what this usage is doing, is taking all 3 ip's(local,local ip6 and public ip4) and displaying it with li element.However, what i need, is only one ip address(public ip4), and it need to be stored into variable so i can process it further. In this case variable which need to be taken out it's ip variable in function addIP(ip).



I did found one code example which can get variable outside function:






<script>
function profileloader()
{
profile = ; // no "var" makes this global in scope
profile[0] = "Joe";
profile[1] = "Bloggs";
profile[2] = "images/joeb/pic.jpg";
profile[3] = "Web Site Manager";
}
profileloader();
document.write("Firstname is: " + profile[0]);
</script>





But when i try to implement , problem is how it works with single function while in code there is function executing function, so i was not able to get variable output. Any ideas?










share|improve this question





























    0















    There was already post with same question, but none of answers was doing what i suppose to do. So here is code example:



    function findIP(onNewIP) {
    var myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
    var pc = new myPeerConnection({
    iceServers: [{
    urls: "stun:stun.l.google.com:19302"
    }]
    }),
    noop = function() {},
    localIPs = {},
    ipRegex = /([0-9]{1,3}(.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g,
    key;

    function ipIterate(ip) {
    if (!localIPs[ip]) onNewIP(ip);
    localIPs[ip] = true;
    }

    pc.createDataChannel("");

    pc.createOffer(function(sdp) {
    sdp.sdp.split('n').forEach(function(line) {
    if (line.indexOf('candidate') < 0) return;
    line.match(ipRegex).forEach(ipIterate);
    });
    pc.setLocalDescription(sdp, noop, noop);
    }, noop);

    pc.onicecandidate = function(ice) {
    if (!ice || !ice.candidate || !ice.candidate.candidate || !ice.candidate.candidate.match(ipRegex)) return;
    ice.candidate.candidate.match(ipRegex).forEach(ipIterate);
    };
    }


    That code is JS function, and after is goes usage:



    function addIP(ip) {
    var li = document.createElement('li');
    li.textContent = ip;
    document.getElementById("IPLeak").appendChild(li);
    }

    findIP(addIP);


    So what this usage is doing, is taking all 3 ip's(local,local ip6 and public ip4) and displaying it with li element.However, what i need, is only one ip address(public ip4), and it need to be stored into variable so i can process it further. In this case variable which need to be taken out it's ip variable in function addIP(ip).



    I did found one code example which can get variable outside function:






    <script>
    function profileloader()
    {
    profile = ; // no "var" makes this global in scope
    profile[0] = "Joe";
    profile[1] = "Bloggs";
    profile[2] = "images/joeb/pic.jpg";
    profile[3] = "Web Site Manager";
    }
    profileloader();
    document.write("Firstname is: " + profile[0]);
    </script>





    But when i try to implement , problem is how it works with single function while in code there is function executing function, so i was not able to get variable output. Any ideas?










    share|improve this question



























      0












      0








      0








      There was already post with same question, but none of answers was doing what i suppose to do. So here is code example:



      function findIP(onNewIP) {
      var myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
      var pc = new myPeerConnection({
      iceServers: [{
      urls: "stun:stun.l.google.com:19302"
      }]
      }),
      noop = function() {},
      localIPs = {},
      ipRegex = /([0-9]{1,3}(.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g,
      key;

      function ipIterate(ip) {
      if (!localIPs[ip]) onNewIP(ip);
      localIPs[ip] = true;
      }

      pc.createDataChannel("");

      pc.createOffer(function(sdp) {
      sdp.sdp.split('n').forEach(function(line) {
      if (line.indexOf('candidate') < 0) return;
      line.match(ipRegex).forEach(ipIterate);
      });
      pc.setLocalDescription(sdp, noop, noop);
      }, noop);

      pc.onicecandidate = function(ice) {
      if (!ice || !ice.candidate || !ice.candidate.candidate || !ice.candidate.candidate.match(ipRegex)) return;
      ice.candidate.candidate.match(ipRegex).forEach(ipIterate);
      };
      }


      That code is JS function, and after is goes usage:



      function addIP(ip) {
      var li = document.createElement('li');
      li.textContent = ip;
      document.getElementById("IPLeak").appendChild(li);
      }

      findIP(addIP);


      So what this usage is doing, is taking all 3 ip's(local,local ip6 and public ip4) and displaying it with li element.However, what i need, is only one ip address(public ip4), and it need to be stored into variable so i can process it further. In this case variable which need to be taken out it's ip variable in function addIP(ip).



      I did found one code example which can get variable outside function:






      <script>
      function profileloader()
      {
      profile = ; // no "var" makes this global in scope
      profile[0] = "Joe";
      profile[1] = "Bloggs";
      profile[2] = "images/joeb/pic.jpg";
      profile[3] = "Web Site Manager";
      }
      profileloader();
      document.write("Firstname is: " + profile[0]);
      </script>





      But when i try to implement , problem is how it works with single function while in code there is function executing function, so i was not able to get variable output. Any ideas?










      share|improve this question
















      There was already post with same question, but none of answers was doing what i suppose to do. So here is code example:



      function findIP(onNewIP) {
      var myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
      var pc = new myPeerConnection({
      iceServers: [{
      urls: "stun:stun.l.google.com:19302"
      }]
      }),
      noop = function() {},
      localIPs = {},
      ipRegex = /([0-9]{1,3}(.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g,
      key;

      function ipIterate(ip) {
      if (!localIPs[ip]) onNewIP(ip);
      localIPs[ip] = true;
      }

      pc.createDataChannel("");

      pc.createOffer(function(sdp) {
      sdp.sdp.split('n').forEach(function(line) {
      if (line.indexOf('candidate') < 0) return;
      line.match(ipRegex).forEach(ipIterate);
      });
      pc.setLocalDescription(sdp, noop, noop);
      }, noop);

      pc.onicecandidate = function(ice) {
      if (!ice || !ice.candidate || !ice.candidate.candidate || !ice.candidate.candidate.match(ipRegex)) return;
      ice.candidate.candidate.match(ipRegex).forEach(ipIterate);
      };
      }


      That code is JS function, and after is goes usage:



      function addIP(ip) {
      var li = document.createElement('li');
      li.textContent = ip;
      document.getElementById("IPLeak").appendChild(li);
      }

      findIP(addIP);


      So what this usage is doing, is taking all 3 ip's(local,local ip6 and public ip4) and displaying it with li element.However, what i need, is only one ip address(public ip4), and it need to be stored into variable so i can process it further. In this case variable which need to be taken out it's ip variable in function addIP(ip).



      I did found one code example which can get variable outside function:






      <script>
      function profileloader()
      {
      profile = ; // no "var" makes this global in scope
      profile[0] = "Joe";
      profile[1] = "Bloggs";
      profile[2] = "images/joeb/pic.jpg";
      profile[3] = "Web Site Manager";
      }
      profileloader();
      document.write("Firstname is: " + profile[0]);
      </script>





      But when i try to implement , problem is how it works with single function while in code there is function executing function, so i was not able to get variable output. Any ideas?






      <script>
      function profileloader()
      {
      profile = ; // no "var" makes this global in scope
      profile[0] = "Joe";
      profile[1] = "Bloggs";
      profile[2] = "images/joeb/pic.jpg";
      profile[3] = "Web Site Manager";
      }
      profileloader();
      document.write("Firstname is: " + profile[0]);
      </script>





      <script>
      function profileloader()
      {
      profile = ; // no "var" makes this global in scope
      profile[0] = "Joe";
      profile[1] = "Bloggs";
      profile[2] = "images/joeb/pic.jpg";
      profile[3] = "Web Site Manager";
      }
      profileloader();
      document.write("Firstname is: " + profile[0]);
      </script>






      javascript






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 23 '18 at 13:10









      Matt Morgan

      2,3202820




      2,3202820










      asked Nov 23 '18 at 12:48









      Luke VenturaLuke Ventura

      1




      1
























          1 Answer
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          oldest

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          0














          you need to learn about callbacks https://developer.mozilla.org/en-US/docs/Glossary/Callback_function



          you function findIP takes a callback that function gets called a couple of times with an ip, so to log for example all ips you could call



          findIP(function(ip){console.log(ip)});





          share|improve this answer
























          • I see that command is working, but i still dont get why not using something like, findIP(function(ip){var x="(ip)"}); it's not working. I read about that callback function but not sure how exactly to make it work.

            – Luke Ventura
            Nov 23 '18 at 17:55











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          1 Answer
          1






          active

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          active

          oldest

          votes






          active

          oldest

          votes









          0














          you need to learn about callbacks https://developer.mozilla.org/en-US/docs/Glossary/Callback_function



          you function findIP takes a callback that function gets called a couple of times with an ip, so to log for example all ips you could call



          findIP(function(ip){console.log(ip)});





          share|improve this answer
























          • I see that command is working, but i still dont get why not using something like, findIP(function(ip){var x="(ip)"}); it's not working. I read about that callback function but not sure how exactly to make it work.

            – Luke Ventura
            Nov 23 '18 at 17:55
















          0














          you need to learn about callbacks https://developer.mozilla.org/en-US/docs/Glossary/Callback_function



          you function findIP takes a callback that function gets called a couple of times with an ip, so to log for example all ips you could call



          findIP(function(ip){console.log(ip)});





          share|improve this answer
























          • I see that command is working, but i still dont get why not using something like, findIP(function(ip){var x="(ip)"}); it's not working. I read about that callback function but not sure how exactly to make it work.

            – Luke Ventura
            Nov 23 '18 at 17:55














          0












          0








          0







          you need to learn about callbacks https://developer.mozilla.org/en-US/docs/Glossary/Callback_function



          you function findIP takes a callback that function gets called a couple of times with an ip, so to log for example all ips you could call



          findIP(function(ip){console.log(ip)});





          share|improve this answer













          you need to learn about callbacks https://developer.mozilla.org/en-US/docs/Glossary/Callback_function



          you function findIP takes a callback that function gets called a couple of times with an ip, so to log for example all ips you could call



          findIP(function(ip){console.log(ip)});






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 23 '18 at 13:07









          L.AL.A

          10328




          10328













          • I see that command is working, but i still dont get why not using something like, findIP(function(ip){var x="(ip)"}); it's not working. I read about that callback function but not sure how exactly to make it work.

            – Luke Ventura
            Nov 23 '18 at 17:55



















          • I see that command is working, but i still dont get why not using something like, findIP(function(ip){var x="(ip)"}); it's not working. I read about that callback function but not sure how exactly to make it work.

            – Luke Ventura
            Nov 23 '18 at 17:55

















          I see that command is working, but i still dont get why not using something like, findIP(function(ip){var x="(ip)"}); it's not working. I read about that callback function but not sure how exactly to make it work.

          – Luke Ventura
          Nov 23 '18 at 17:55





          I see that command is working, but i still dont get why not using something like, findIP(function(ip){var x="(ip)"}); it's not working. I read about that callback function but not sure how exactly to make it work.

          – Luke Ventura
          Nov 23 '18 at 17:55


















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