From 88bf9516752558207bd34c4fec73ce2632c22b2c Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Sat, 29 Jul 2023 10:41:57 -0230
Subject: use Stack push, pop methods

---
 calculator.go | 3 +--
 ui.go         | 4 ++--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/calculator.go b/calculator.go
index b5dae10..8afc43a 100644
--- a/calculator.go
+++ b/calculator.go
@@ -56,8 +56,7 @@ func (c *Calculator) performOp(op byte) error {
 	} else if fl, err := strconv.ParseFloat(c.buf, 64); err == nil {
 		fn(&c.stack[len(c.stack)-1], fl)
 	} else if len(c.stack) > 1 {
-		fn(&c.stack[len(c.stack)-2], c.stack[len(c.stack)-1])
-		c.stack = c.stack[:len(c.stack)-1]
+		fn(&c.stack[len(c.stack)-2], *c.stack.pop())
 	}
 	c.buf = ""
 	return nil
diff --git a/ui.go b/ui.go
index 85919c4..9bf9caa 100644
--- a/ui.go
+++ b/ui.go
@@ -58,9 +58,9 @@ func (ui UI) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 			if fn := parseFunction(ui.calc.buf); fn != nil {
 				fn(ui.calc.stack)
 			} else if con := parseConstant(ui.calc.buf); con != nil {
-				ui.calc.stack = append(ui.calc.stack, *con)
+				ui.calc.stack.push(*con)
 			} else if f, err := strconv.ParseFloat(ui.calc.buf, 64); err == nil {
-				ui.calc.stack = append(ui.calc.stack, f)
+				ui.calc.stack.push(f)
 			}
 			ui.calc.buf = ""
 		default:
-- 
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