add: lua gtk3 examples (#156)

1 files changed, 38 insertions, 0 deletions

diff --git a/examples/gtk3/lua/applauncher/lib.lua b/examples/gtk3/lua/applauncher/lib.lua
new file mode 100644
index 0000000..8a50bdd
--- /dev/null
+++ b/examples/gtk3/lua/applauncher/lib.lua
@@ -0,0 +1,38 @@
+local M = {}
+
+function M.src(path)
+	local str = debug.getinfo(2, "S").source:sub(2)
+	local src = str:match("(.*/)") or str:match("(.*\\)") or "./"
+	return src .. path
+end
+
+---@generic T, R
+---@param array T[]
+---@param func fun(T, i: integer): R
+---@return R[]
+function M.map(array, func)
+	local new_arr = {}
+	for i, v in ipairs(array) do
+		new_arr[i] = func(v, i)
+	end
+	return new_arr
+end
+
+---@generic T
+---@param array T[]
+---@param start integer
+---@param stop? integer
+---@return T[]
+function M.slice(array, start, stop)
+	local new_arr = {}
+
+	stop = stop or #array
+
+	for i = start, stop do
+		table.insert(new_arr, array[i])
+	end
+
+	return new_arr
+end
+
+return M