如何访问JavaScript中另一个object的数据？

Question

I want to access availJobs in jobs.scan object but I couldn't. It is not defined in jobs.attack . What can I do to access the part of jobs.scan in other objects?

var jobs = new Array();

jobs.scan = function() {
    var availJobs = new Array();
    var jobContents = dom.get("app8743457343_content");
    var boldthreads = jobContents.getElementsByTagName('b');
    for(var i = 0; i < boldthreads.length; i++) {
        if(boldthreads[i].style.color == 'silver') {
            availJobs.push(boldthreads[i].textContent);
        }
    }
    return availJobs;
}

jobs.attack = function() {
    jobs.scan();
    alert(jobs.availJobs[0]);
}

jobs.attack();

availJobs[0] in jobs.attack doesn't work. It's undefined . How can I set the availJobs as public and can be accessed in other objects?

Thanks for all the help:! Here's the code that I put:

var jobs = {
    availJobs: new Array(),
    scan: function() {
        var jobContents = dom.get("app8743457343_content");
        var boldthreads = jobContents.getElementsByTagName('b');
        for(var i = 0; i < boldthreads.length; i++) {
            if(boldthreads[i].style.color == 'silver') {
                this.availJobs.push(boldthreads[i].textContent);
            }
        }
    },
    attack: function() {
        this.scan();
        alert(this.availJobs[0]);
    },
};

jobs.attack();

This code is definitely more elegant don't you think? I used this and it worked!

Answer 1

{} is used to initialize an object and Array to initialize an array.

var jobs = {
    availJobs : new Array()
}

jobs.scan = function() {
    var jobContents = dom.get("app8743457343_content");
    var boldthreads = jobContents.getElementsByTagName('b');
    for(var i = 0; i < boldthreads.length; i++) {
        if(boldthreads[i].style.color == 'silver') {
            availJobs.push(boldthreads[i].textContent);
        }
    }
    return availJobs;
}

In a {} declaration, you can put add multiple members to your object if you separe them with a comma , :

var jobs = {
    availJobs : new Array(),
    anotherMember : null,
    anotherArray : new Array(),
    aFunction = function() {...}
}

Answer 2

I may be wrong here, but I'm pretty sure you need to declare availJobs outside of the function itself, IE: jobs.availJobs = new Array();

Answer 3

Your code is incorrect. jobs.scan is one function, jobs.attack is another. availJobs is a local variable defined in jobs.scan . You can't access local variables of one function from another.

Even more, availJobs doesn't exist by the time you try to access it, because jobs.scan is already finished.

Answer 4

You need to declare the availJobs array and jobs should be an object.

var jobs = {}

jobs.availJobs = []

jobs.scan = function() {
    var availJobs = new Array();
    var jobContents = dom.get("app8743457343_content");
    var boldthreads = jobContents.getElementsByTagName('b');
    for(var i = 0; i < boldthreads.length; i++) {
        if(boldthreads[i].style.color == 'silver') {
            availJobs.push(boldthreads[i].textContent);
        }
    }
    return availJobs;
}

jobs.attack = function() {
    jobs.scan();
    alert(jobs.availJobs[0]);
}

jobs.attack();