Tagged Questions
10
votes
4answers
403 views
Does null occupy memory in javascript?
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];
where every element of both arrays is an object.
The small ...
2
votes
3answers
143 views
javascript sort sparse array keep indexes
What is the best method to sort a sparse array and keep the elements on the same indexes?
For example:
a[0] = 3,
a[1] = 2,
a[2] = 6,
a[7] = 4,
a[8] = 5,
I would like after the sort to have
...
0
votes
4answers
101 views
Condensing a sparse array in Javascript?
I have an array of elements where the entries are sparse. How can I easily condense the sparse array into a dense array so that I don't have to keep checking for null and undefined values every time ...
3
votes
2answers
148 views
Are JavaScript/ECMAScript arrays “sparse” in Node.js?
My question is the same as Are Javascript arrays sparse? with one difference...
Are JavaScript arrays sparse, as implemented in Node.js (and/or V8)? I had assumed the were, but then I did the ...
2
votes
4answers
2k views
Get first element of a sparse JavaScript array
I have an array of objects in javascript. I use jquery.
How do i get the first element in the array? I cant use the array index - as I assign each elements index when I am adding the objects to the ...
2
votes
2answers
301 views
JSON implementations that handle sparse arrays
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 ...
26
votes
4answers
4k views
Are Javascript arrays sparse?
That is, if I use the current time as an index into the array:
array[Date.getTime()] = value;
will the interpreter instantiate all the elements from 0 to now? Do different browsers do it ...
1
vote
2answers
770 views
Recommended way to map between JavaScript sparse array and C# (sparse)array?
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 that contained ...
2
votes
2answers
2k views
Help with Sparse Array in JScript
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 from the lowest (negative) index ...
