sparse « Array « Javascript Data Type Q&A

1. Help with Sparse Array in JScript    stackoverflow.com

I have a sparse array in Jscript, with non-null elements occuring at both negative and positive indices. When I try to use a for in loop, it doesn't traverse the array ...

2. Recommended way to map between JavaScript sparse array and C# (sparse)array?    stackoverflow.com

I am trying to map a JavaScript sparse array to a C# representation. What is the recommended way of doing this? It am considering using a dictionary containing the list of oridinals ...

3. Are Javascript arrays sparse?    stackoverflow.com

That is, if I use the current time as an index into the array:

array[Date.getTime()] = value;

4. JSON implementations that handle sparse arrays    stackoverflow.com

I need to know if any JSON implementations can handle sparse arrays to my satisfaction. I've seen the question: http://stackoverflow.com/questions/1733658/how-to-represent-a-sparse-array-in-json but using an object rather than an array is ...

5. Does null occupy memory in javascript?    stackoverflow.com

I've got the following situation:

var large = [a,b,c,d,e,f,g,h,i];
var small = [a2, b2, c2, null, null, null, null, null, null, i2];

6. Javascript - array index issue in non sparse array    stackoverflow.com

non sparse array are contiguous in nature and from 0 to length-1, all index should return true for 'in' operator. It should be true also for empty element.

obj1 = {x:1,y:2};
obj2 = ...