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Add ArrayList.sort #3917

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Add ArrayList.sort #3917

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21 changes: 21 additions & 0 deletions lib/std/array_list.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -235,6 +235,10 @@ pub fn AlignedArrayList(comptime T: type, comptime alignment: ?u29) type {
if (self.len == 0) return null;
return self.pop();
}

pub fn sort(self: *Self, lessThan: fn (lhs: T, rhs: T) bool) void {
std.sort.sort(T, self.items[0..self.len], lessThan);
}
};
}

Expand Down Expand Up @@ -442,3 +446,20 @@ test "std.ArrayList: ArrayList(T) of struct T" {
try root.sub_items.append(Item{ .integer = 42, .sub_items = ArrayList(Item).init(debug.global_allocator) });
testing.expect(root.sub_items.items[0].integer == 42);
}

test "std.ArrayList.sort" {
var list = ArrayList(i32).init(debug.global_allocator);
defer list.deinit();

try list.append(4);
try list.append(2);
try list.append(1);
try list.append(3);

list.sort(std.sort.asc(i32));

testing.expect(list.items[0] == 1);
testing.expect(list.items[1] == 2);
testing.expect(list.items[2] == 3);
testing.expect(list.items[3] == 4);
}