How to access array/object inside function in javascript ?

Question

Hello I have array outside function like below :

var daily = [];
daily["data"]=[];
daily["data"].push('hello');

function demo()
{
console.log(daily); // not working here
}

How to declare this object as global in Javascript ?

Use {} for objects. [] are used for arrays. But then you can't use push so you need to make up your mind what type of structure you're using. — Andy
– Andy, Commented Feb 4, 2014 at 16:03
@Andy This is wild: jsfiddle.net/2NSUQ. Take a look at the console output...at least tested in Chrome. Seems to be an associative array... — crush
– crush, Commented Feb 4, 2014 at 16:06
@crush, see my amendment. If you try to find the length it returns 0. See also: andrewdupont.net/2006/05/18/… — Andy
– Andy, Commented Feb 4, 2014 at 16:10
@Andy I guess I just forgot that JavaScript arrays actually have the ability to use a string value as an index. It's probably been a decade since I attempted that, if ever... — crush
– crush, Commented Feb 4, 2014 at 16:13

Tyler McGinnis · Accepted Answer · 2014-02-04 16:03:04Z

1

It could be because your function is being hoisted. Try this instead for your function.

var demo = function(){
  console.log(daily);
}

You might also considering just passing that daily variable into your function like so,

var demo = function(d){
  console.log(d);
}

then when you want to call it.

demo(daily);

answered Feb 4, 2014 at 16:03

Tyler McGinnis

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2 Comments

user3269884 Over a year ago

how do i call this function ?

Tyler McGinnis Over a year ago

Same as you normally would. demo(); Also if I were you consider passing in daily into the function, var demo = function(d){console.log(d)} then when you call it demo(daily);

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