Skip to main content

Pass parameters in setInterval function

Image
By User


How to pass parameter while call a function using setInterval. viz. setInterval('funca(10,3)',500); is incorrect.



Source: Tips4all, CCNA FINAL EXAM
Labels:

Comments

  1. UserMay 19, 2012 at 2:30 AM

    You need to create an anonymous function so the actual function isn't executed right away.

    setInterval( function() { funca(10,3); }, 500 );

    ReplyDelete
  2. UserMay 19, 2012 at 2:30 AM

    You can use an anonymous function;

    setInterval(function() { funca(10,3); },500);

    ReplyDelete
  3. UserMay 19, 2012 at 2:30 AM

    Quoting the arguments should be enough:

    OK --> reloadIntervalID = window.setInterval( "reloadSeries('"+param2Pass+"')" , 5000)

    KO --> reloadIntervalID = window.setInterval( "reloadSeries( "+param2Pass+" )" , 5000)


    Note the single quote ' for each argument.

    Tested with IE8, Chrome and FireFox

    ReplyDelete
  4. UserMay 19, 2012 at 2:30 AM

    You can pass the parameter(s) as property of the function object, not as a parameter:

    var f = this.someFunction; //use 'this' if called from class
    f.parameter1 = obj;
    f.parameter2 = this;
    f.parameter3 = whatever;
    setInterval(f, 1000);


    Then in your function someFunction, you will have access to the parameters. This is particularly useful inside classes where the scope goes to the global space automatically and you lose references to the class that called setInterval. With this approach "parameter2" in "someFunction", in the example above, will have the right scope.

    ReplyDelete
  5. UserMay 19, 2012 at 2:30 AM

    This is not exactly the same parameters as I read here:
    http://www.w3schools.com/jsref/met_win_setinterval.asp

    I'm a bit confused ...

    ReplyDelete
  6. UserMay 19, 2012 at 2:30 AM

    This works setInterval("foo(bar)",int,lang); Jon Kleiser lead me to the answer.

    ReplyDelete
  7. UserMay 19, 2012 at 2:30 AM

    Add them as parameters to setInterval:

    setInterval(funca,500,10,3);

    ReplyDelete

Post a Comment

Popular posts from this blog

Why is this Javascript much *slower* than its jQuery equivalent?

By User
I have a HTML list of about 500 items and a "filter" box above it. I started by using jQuery to filter the list when I typed a letter (timing code added later): $('#filter').keyup( function() { var jqStart = (new Date).getTime(); var search = $(this).val().toLowerCase(); var $list = $('ul.ablist > li'); $list.each( function() { if ( $(this).text().toLowerCase().indexOf(search) === -1 ) $(this).hide(); else $(this).show(); } ); console.log('Time: ' + ((new Date).getTime() - jqStart)); } ); However, there was a couple of seconds delay after typing each letter (particularly the first letter). So I thought it may be slightly quicker if I used plain Javascript (I read recently that jQuery's each function is particularly slow). Here's my JS equivalent: document.getElementById('filter').addEventListener( 'keyup', function () { var jsStart = (new Date).getTime()...
3 comments
Read more

Is it possible to have IF statement in an Echo statement in PHP

By User
Thanks in advance. I did look at the other questions/answers that were similar and didn't find exactly what I was looking for. I'm trying to do this, am I on the right path? echo " <div id='tabs-".$match."'> <textarea id='".$match."' name='".$match."'>". if ($COLUMN_NAME === $match) { echo $FIELD_WITH_COLUMN_NAME; } else { } ."</textarea> <script type='text/javascript'> CKEDITOR.replace( '".$match."' ); </script> </div>"; I am getting the following error message in the browser: Parse error: syntax error, unexpected T_IF Please let me know if this is the right way to go about nesting an IF statement inside an echo. Thank you.
5 comments
Read more