Split text into an array to get a value
# Arguments
- a_sep : A separator string
- a_index : An index to cut out
- a_text : Text to split
# Demo
```
$syscmd|(ls -lah LICENSE)
$static(size , $cut-($space(),1) )
File size is $size()
===
File size is 1
```
# Example
$assert(b,$cut(/,-2,a/b/c))