jQuery Object 中的反向迭代？

Question

 var   test_data =  {'hr' : [1, 'Hour'], 'min' : [60, 'Minute'], 's' : [3600, 'Second']}

Now while I iterate, I want to get 's' first-

$.each(test_data, function(i, j) {
         // I need to get 's' first
});

I have tried test_data.revers() which does not work. Any solution?

Answer 1

You can use Object.keys and .reverse as follows:

 var test_data = { 'hr': [1, 'Hour'], 'min': [60, 'Minute'], 's': [3600, 'Second'] }; $.each(Object.keys(test_data).reverse(), function(i, key) { console.log(key, test_data[key]); });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

Answer 2

For a defined order, you could sort the keys of the object and iterate them in descending order of the first value of the array.

 var data = { hr: [1, 'Hour'], min: [60, 'Minute'], s: [3600, 'Second'] }; for (const key of Object.keys(data).sort((a, b) => data[b][0] - data[a][0])) { console.log(key, ...data[key]); }