Function isSorted [src]

Prototype

 pub fn isSorted( comptime T: type, items: []const T, context: anytype, comptime lessThan: fn (context: @TypeOf(context), lhs: T, rhs: T) bool, ) bool

Parameters

T: typeitems: []const TlessThan: fn (context: @TypeOf(context), lhs: T, rhs: T) bool

Example

 test isSorted {
    try testing.expect(isSorted(i32, &[_]i32{}, {}, asc_i32));
    try testing.expect(isSorted(i32, &[_]i32{10}, {}, asc_i32));
    try testing.expect(isSorted(i32, &[_]i32{ 1, 2, 3, 4, 5 }, {}, asc_i32));
    try testing.expect(isSorted(i32, &[_]i32{ -10, 1, 1, 1, 10 }, {}, asc_i32));

    try testing.expect(isSorted(i32, &[_]i32{}, {}, desc_i32));
    try testing.expect(isSorted(i32, &[_]i32{-20}, {}, desc_i32));
    try testing.expect(isSorted(i32, &[_]i32{ 3, 2, 1, 0, -1 }, {}, desc_i32));
    try testing.expect(isSorted(i32, &[_]i32{ 10, -10 }, {}, desc_i32));

    try testing.expect(isSorted(i32, &[_]i32{ 1, 1, 1, 1, 1 }, {}, asc_i32));
    try testing.expect(isSorted(i32, &[_]i32{ 1, 1, 1, 1, 1 }, {}, desc_i32));

    try testing.expectEqual(false, isSorted(i32, &[_]i32{ 5, 4, 3, 2, 1 }, {}, asc_i32));
    try testing.expectEqual(false, isSorted(i32, &[_]i32{ 1, 2, 3, 4, 5 }, {}, desc_i32));

    try testing.expect(isSorted(u8, "abcd", {}, asc_u8));
    try testing.expect(isSorted(u8, "zyxw", {}, desc_u8));

    try testing.expectEqual(false, isSorted(u8, "abcd", {}, desc_u8));
    try testing.expectEqual(false, isSorted(u8, "zyxw", {}, asc_u8));

    try testing.expect(isSorted(u8, "ffff", {}, asc_u8));
    try testing.expect(isSorted(u8, "ffff", {}, desc_u8));
}

Source

  pub fn isSorted(
    comptime T: type,
    items: []const T,
    context: anytype,
    comptime lessThan: fn (context: @TypeOf(context), lhs: T, rhs: T) bool,
) bool {
    var i: usize = 1;
    while (i < items.len) : (i += 1) {
        if (lessThan(context, items[i], items[i - 1])) {
            return false;
        }
    }

    return true;
}  