some apis

std/compact_map.oc

@@ -156,6 +156,8 @@ def Map::at(&this, key: K): V {
     return item.value
 }
 
+def Map::size(&this): u32 => .items.size
+
 def Map::contains(&this, key: K): bool {
     let hash = key.hash()
     let index = .get_index(key, hash)

std/map.oc

@@ -190,6 +190,8 @@ def Map::push_keys(&this, vec: &Vector<K>) {
     }
 }
 
+def Map::size(&this): u32 => .num_items
+
 //* Checks if the map is empty
 def Map::is_empty(&this): bool => .num_items == 0
 

std/vector.oc

@@ -52,6 +52,19 @@ def Vector::pop(&this): T {
     return .data[.size]
 }
 
+//* Pops an element from the given index and returns it - O(n)
+def Vector::pop_at(&this, i: u32): T {
+    assert .size > 0, "Empty vector in Vector::pop_at"
+    assert i < .size, "Out of bounds in Vector::pop_at"
+
+    let val = .data[i]
+    for let j = i; j < .size - 1; j += 1 {
+        .data[j] = .data[j + 1]
+    }
+    .size -= 1
+    return val
+}
+
 //* Appends the contents of another vector to this one
 def Vector::extend(&this, other: &Vector<T>) {
     for val : other.iter() {