Ops

Range

RangeBounds

RangeBounds works the same as Rust's RangeBounds (usually seen as syntactic sugar e.g. 1..=3) They have two uses:

1. RangeBounds can be used to get a Slice of an Arr, Slice, or List.

void func(RangeBounds bounds) {
    List<int> list = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
    Slice<int> slice = list(bounds);
    expect(slice, equals([4, 5, 6, 7, 8, 9]));
}

func(RangeFrom(4));

The variants are Range, RangeFrom, RangeFull, RangeInclusive, RangeTo, and RangeToInclusive.

2. RangeBounds that also implement IterableRangeBounds can be iterated over as a generator.

for(int x in Range(5, 10)){ // 5, 6, 7, 8, 9
    // code
}

All RangeBounds can be const.

range Function

range is a convenience function that works the same as the python range function. As opposed to the RangeBounds classes, the range function can have negative ranges and varying step sizes.

range(end); // == range(0,end);
range(start, end);
range(start, end, step);

for(final x in range(0, 10, 1)){}
// equivalent to
for(final x in range(10)){}

Note Arr.range(..) also exists as a more efficient method for when it is known collecting the range is needed.