javascript - How to use setTimeout and get a return variable? -

I have a function geocode that works ... I want to implement a delay to prevent query boundary errors I am trying, and here is my javascript:

  tmpResult = null; Set timeout (tmpResult = geocode (features [j], cities [j], state [j]),} 100);  

variable tmpResult is the result of my geocode .. However, tmpResult is null when I run the script .. am I missing?

Thanks! setTimeout ()

tmpResult is completely valid when < Code> setTimeout () runs and then you may find this issue possible that you are trying to use setTimeout () before tmpResult . Remember, this will run 100MMS in the future. Your other JavaScript will continue to run before that time.

What do you have to do to tmpResult use the value setTimeout () or call some function and pass it in the value of tmpResult .

Timeout (function () {var tmpResult = geocode (features [j], Cities [J], States [J]); Call MyFunction (TMPRSult);}, 100);

setTimeout () is asynchronous and you can not synchronize while using it. You should have asynchronous code which means the value of means tmpResult until the timer executes the callback so that you can not try to use it before the timer callback is activated is not valid.

If you try to do this, you have found:

  var tmpResult = null; Set timeout (function (tmpResult = geocode (features [j], cities [j], state [j]);}, 100); console.log (tmpResult);  

Because your console.log (tmpResult) will be played before the statement timer becomes active, it will not work tmpResult is not yet a value.

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FYI, you should make sure that geocode () not even an asynchronous function because if it is, then you will have to code asynchronously with There are too.