我无法理解代码

Question

I am new to javascript. After lots of hours I am not able to understand the code. I would be grateful if someone could help me. Thanks

for(var x = 0; x < id_inters['inters'].length; x++) {
    var a,b;
    if(id_inters['inters'][x]['First_ID'] == data.main[0].cust) {
        a = id_inters['inters'][x]['First_ID'];
        b = id_inters['inters'][x]['Second_ID2'];

Answer 1

You can take it with these steps from the for loop:

1. var x is declared and assigned value of 0.
2. There will be an Object named id_inters which hold an array named inters which also holds objects in it.
3. Now inside the loop you declare two variables var a, b; .
4. Now that n the condition you are checking the value of the iterated object with id_inters['inters'][x]['First_Id'] where x is the index number if each iteration which is incremented from 0 to length of array.
5. And you are checking each iterated value to the first value of the data['main'][0].cust . Where data is an object which contains an array named data and you are comparing its first object's cust value.