How to set global variable in JQuery/javascript

Question

Hi i am new to jquery/javascript. I have created a global variable. I set the value of value of this variable inside function like this:

var arr;
CreatecheckPassword: function() {

                var pas = document.getElementById("pos-password")

                var user = new db.web.Model("res.users").get_func("read")(this.session.uid, ['password']).pipe(function(result) {
                     arr = result.password;
                     alert(arr);//prints the expected value
                });
                alert(arr);//prints nothing
},

I don't know where i am doing wrong. I tried hard but was unable to find the solution. Can someone help.

I would guess that your database access function is asynchronous, which means control continues to the alert that prints nothing before the callback is executed and the arr variable is set. — nnnnnn
– nnnnnn, Commented Mar 10, 2012 at 9:16
How can then i set the value of this variable. Can't do without database operation. — Abdul Hamid
– Abdul Hamid, Commented Mar 10, 2012 at 9:21
Why can't you move the second alert into a separate function and call it in database callback function? — Just_Mad
– Just_Mad, Commented Mar 10, 2012 at 9:35
Basically you have to restructure your code so that anything that uses the return from an asynchronous function is included within the callback that you pass to the function (or included in a separate function called from that callback). You can probably find some good explanations of Async JavaScript with Google - if you can't find any specifically about database access look at some Ajax tuturials because exactly the same async callback issue occurs with Ajax calls. — nnnnnn
– nnnnnn, Commented Mar 10, 2012 at 9:46

Cheeso · Accepted Answer · 2012-03-10 12:38:27Z

1

jslint or jshint is your friend. Get it and use it on your code to get lint messages.

enter image description here

answered Mar 10, 2012 at 12:38

Cheeso

193k106 gold badges486 silver badges734 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

nnnnnn Over a year ago

But none of the errors/warnings shown have anything to do with the problem, indeed the problem is not caused by a syntax error...

Cheeso Over a year ago

The problem isn't stated in the question, then. In fact the original question isn't clear at all on the nature of the problem. Also the title of the post is wrong - the question is not at all about how to "Set a global variable". Reading the comments, it's something about asynch invocation of ajax, I think.

Collectives™ on Stack Overflow

How to set global variable in JQuery/javascript

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related