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Groups > comp.lang.javascript > #14251

Re: function(){}() and subsequent calls

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Am 31.05.2012 07:51, schrieb Andrew Poulos:
> With
> var foo = function() {}()
> if I later call
> foo()
> I get an error. Whereas using
> var foo = function() {}
> lets me call
> foo()
>
> Adding the succeeding parentheses calls the function but does it alter
> it as well?
>
> Andrew Poulos

var foo = function(){}();

executes the no-name function and assingns the return value to foo.
typeof foo == "undefined"

var foo = function(){return true;}();
typeof foo == "boolean"

var foo = function(){};
assigns the function to foo
typeof foo == "function"

var foo = function(){return true;};
typeof foo == "function"

Holger

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function(){}() and subsequent calls Andrew Poulos <ap_prog@hotmail.com> - 2012-05-31 15:51 +1000
  Re: function(){}() and subsequent calls Holger Suhr <holgerholgerde@yahoo.de> - 2012-05-31 08:51 +0200
    Re: function(){}() and subsequent calls Andrew Poulos <ap_prog@hotmail.com> - 2012-05-31 17:12 +1000
      Re: function(){}() and subsequent calls Gregor Kofler <usenet@gregorkofler.com> - 2012-05-31 13:40 +0200
      Re: function(){}() and subsequent calls Matt McDonald <matt@fortybelow.ca> - 2012-05-31 09:57 -0600
        Re: function(){}() and subsequent calls Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-06-01 01:12 +0200

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