diff --git a/examples/calculator/src/index.tsx b/examples/calculator/src/index.tsx
index 852911990..a2ed8284b 100644
--- a/examples/calculator/src/index.tsx
+++ b/examples/calculator/src/index.tsx
@@ -403,7 +403,7 @@ class CalculatorApp extends Widget {
     }
 
     private evaluate() {
-        if (this.expression.trim() === "") return;
+        if (this.expression.trim().length === 0) return;
         const oldExpr = this.expression;
         this.result = safeEval(this.expression);
         if (this.result !== null && !this.result.startsWith("Error")) {
diff --git a/examples/todo-app/src/index.ts b/examples/todo-app/src/index.ts
index d26035d3c..d4cf9b550 100644
--- a/examples/todo-app/src/index.ts
+++ b/examples/todo-app/src/index.ts
@@ -104,7 +104,7 @@ class CustomMultiProgress extends (MultiProgressClass as any) {
             const value = Math.max(0, Math.min(1, item.value));
             const filled = Math.round(barWidth * value);
 
-            const pct = Math.round(value * 100);
+            const pct = Math.round(value * 100 + Number.EPSILON);
             const percentStr = ` ${pct}% `;
             const showPct = barWidth >= percentStr.length;
             const labelStart = showPct ? Math.floor((barWidth - percentStr.length) / 2) : -1;
diff --git a/examples/widget-gallery/src/index.ts b/examples/widget-gallery/src/index.ts
index 57b141244..ec688a7fc 100644
--- a/examples/widget-gallery/src/index.ts
+++ b/examples/widget-gallery/src/index.ts
@@ -129,7 +129,7 @@ class WidgetGalleryApp extends Widget {
         }
 
         // Tab switching: 1-6
-        const num = parseInt(event.key);
+        const num = parseInt(event.key, 10);
         if (num >= 1 && num <= 6) {
             this._switchTab(num - 1);
             return true;