在javascript中设置年份范围

Question

How can I define an array range without specifying each option in javascript?

Right now I have this:

    var year = { 
            '0': '2000',
                '1': '2001',
                '2': '2002',
                '3': '2003',
                '4': '2004',
                '5': '2005',
                '6': '2006',
                '7': '2007',
                '8': '2008',
                '9': '2009' 
            };

Answer 1

You said you want an array, but you have a plain old object in your example. From your comment on this answer, however, it sounds like you really do want a normal object, so that's what I'll use.

At any rate, you can do this with a loop:

var year = {};        //or use [] if you want an array
var min_year = 2000;
var max_year = 2009;
for(var i = 0; i <= max_year - min_year; i++) {
    year[i] = i + min_year;
}

alert(year[5]);   //2005

You can expand on this example to suit your needs.

Answer 2

You don't have to use a loop to solve the issue

var startYr = 2000;

var year = function(i){
    return i + startYr;
};

// usage
year(0);

// output
2000

Answer 3

Your code example and your question are completely different:

1. This is considered to be an object

    var variable = {}; 

2. Whereas this is considered to be an array

    var variable = []; 

There is a slight difference between them. For more information on the topic you can check What is the difference between an array and an object?

So, if you actually need an javascript array this code should do the work:

function generate_year_range(start, end){
    var years = [];
    for(var year = start; year <= end; year++){
        years.push(year)
    }
    return years;
}
var my_years = generate_year_range(2000,2009);

This will generate the years from 2000 to 2009(including) and store them into an array. So, your my_years variable will hold [2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009] .