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Add appendSlice function (#448)

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Marc Tiehuis 2017-09-10 05:49:40 +12:00 committed by Andrew Kelley
parent 67a31befa6
commit f725b20de6
1 changed files with 16 additions and 0 deletions
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16
std/array_list.zig
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@ -39,6 +39,12 @@ pub fn ArrayList(comptime T: type) -> type{
*new_item_ptr = *item;
}
pub fn appendSlice(l: &Self, items: []const T) -> %void {
%return l.ensureCapacity(l.len + items.len);
mem.copy(T, l.items[l.len..], items);
l.len += items.len;
}
pub fn resize(l: &Self, new_len: usize) -> %void {
%return l.ensureCapacity(new_len);
l.len = new_len;
@ -88,4 +94,14 @@ test "basic ArrayList test" {
assert(list.pop() == 10);
assert(list.len == 9);
%%list.appendSlice([]const i32 { 1, 2, 3 });
assert(list.len == 12);
assert(list.pop() == 3);
assert(list.pop() == 2);
assert(list.pop() == 1);
assert(list.len == 9);
%%list.appendSlice([]const i32 {});
assert(list.len == 9);
}