JavaScript console.log execution order?

问题

I have code that looks something like this:

function pathfind (start,end,map)
{
    this.Init = function ()
    {
       this.open_node = new Array();
       this.open_node.push(start);
       console.log(this.open_node);
       this.Loop();
    }
    this.Loop = function ()
    {
       //Some code here
    }
    this.Init();
}

For some reason when I push "start" to this.open_node and I log its value, I get "undefined". However, after some bug testing I realized that commenting out this.Loop(); in this.Init causes push to function properly and console.log to return [start] as it should. Can anyone explain why on earth this behavior would occur?

EDIT: I'm calling

pathfind({x:2,y:2},{x:24,y:24},parsemap(25,25));

回答1:

After further research I found that console.log doesn't execute immediately in Chrome. Hence the outdated reports.

回答2:

Your code executes pathfind function that returns undefined(and it should be this way) but you wait for result from this.Init function. Should probably execute it instead of pathfind.

来源：https://stackoverflow.com/questions/12737826/javascript-console-log-execution-order