Lonely Planet - 1 year ago 92
Javascript Question

# Get the N elements from array based on the position

I want a function that returns the sub array which takes a position & the no. of elements I want. I think there may be some algorithm to find the pivot point or something & from that I can get the sub array, but I totally forgot it.

``````Example: a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
I want 6 elements
if position = 0, then I want [1, 2, 3, 4, 5, 6]
if position = 1, then [1, 2, 3, 4, 5, 6]
if position = 2, then [1, 2, 3, 4, 5, 6]
if position = 3, then [1, 2, 3, 4, 5, 6]
if position = 4, then [2, 3, 4, 5, 6, 7]
if position = 5, then [3, 4, 5, 6, 7, 8]
if position = 6, then [4, 5, 6, 7, 8, 9]
if position = 7, then [5, 6, 7, 8, 9, 10]
if position = 8, then [5, 6, 7, 8, 9, 10]
if position = 9, then [5, 6, 7, 8, 9, 10]
simply get the middle of N elements based on the position I pass.
``````

I can write up my own
`loop`
which will contain multiple
`if-else`
conditions to get it done. But I feel there may be some easy way to do it.

I didnt include my incomplete code snippet because I strongly feel there must be some algorithm to do this.

What you want is : `Array.prototype.slice(...)`
``````var n = 6;