slice
Perform array-slice operations on a list or string.
If the argument is a binary then it is handles as an UTF-8 encoded string.
Given a list [1,2,3,4,5,6,7,8,9,0]
Get all elements from element M to element N:
{{ list|slice:[3,7] }} -> [3,4,5,6,7]
{{ list|slice:[3,-3] }} -> [3,4,5,6,7]
{{ list|slice:[-7,-3] }} -> [4,5,6,7]
{{ list|slice:[-7,7] }} -> [4,5,6,7]
Get all elements except the first N:
{{ list|slice:[3,] }} -> [3,4,5,6,7,8,9,0]
{{ list|slice:[-7,] }} -> [4,5,6,7,8,9,0]
Get all elements up to element N:
{{ list|slice:[,3] }} -> [1,2,3]
{{ list|slice:[3] }} -> [1,2,3]
Get all elements except the last N:
{{ list|slice:[,-3] }} -> [1,2,3,4,5,6,7]
{{ list|slice:[-3] }} -> [1,2,3,4,5,6,7]
If the slice start is after the slice end then [] is returned:
{{ list|slice:[2,1] }} -> []
An empty slice returns the whole input:
{{ list|slice:[,] }} -> [1,2,3,4,5,6,7,8,9,0]