如何通过JavaScript中的函数返回对象属性

Question

I have a simple object and I want to call a particular property by passing a property name through a function:

spit(name);

function spit(value) {
    var test = new Object();
    test.name = "Bill";
    test.number = 24;
    console.log(test.value);
}

The above code should return "Bill". How is this possible?

Answer 1

Sounds like you're looking for something like this:

spit('name');

function spit(value) {
    var test = new Object();
    test.name = "Bill";
    test.number = 24;
    console.log(test[value]);
}

Answer 2

You are returning the value property, which has not been defined for the object. Also, you aren't quoting your parameter when calling spit() , which might be a problem.

Try using this:

function spit(value) {
    var test = new Object();
    test.name = "Bill";
    test.number = 24;
    console.log(test[value]);
}

spit('name');

Answer 3

function spit(value) {
    var test = {
       name: 'Bill',
       number: 24
    }

    test[value] = value;

    return test.value;   
}