Array.foldr()
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Array.foldr(SomFunction, SomeStartValue)
At each element, SomeFunction (that can take two parameter values) are called in sequence for element from the right. The second parameter is the last value of evaluation of the given SomeFunction. For the very first element, the SomeStartValue is passed as the second parameter, if present. If no SomeStartValue is provided, it starts with the last two as the pair to start with.
a=1..5;
a.foldr(
function (last,x)
{
OUTPUT([last,x,(last-x)]);
return(last-x)
},
0
)
0 5 -5
-5 4 -9
-9 3 -12
-12 2 -14
-14 1 -15
-15
a=1..5;
a.foldr(
function (last,x)
{
OUTPUT([last,x,(last-x)]);
return(last-x)
}
)
5 4 1
1 3 -2
-2 2 -4
-4 1 -5
-5
1..3.foldr(DIVIDE,10)
1.6666666666666667
which is 10/3/2