set aTargValue to 2

set anArray to current application’s NSMutableArray’s arrayWithArray:{5, 2, 1, 3, 4}
set aInd to anArray’s indexOfObject:aTargValue

if aInd = current application’s NSNotFound or (aInd as real > 9.99999999E+8) then return {}
anArray’s removeObjectAtIndex:aInd
return anArray as list
–> {​​​​​5, ​​​​​1, ​​​​​3, ​​​​​4​​​}