Too long gaps can actually result in acidity or gastritis. It's always better to eat something every 3-4 hours. Most common snacks can be fruits, cut vegetables like cucumbers, carrots etc, sprouts, 6-8 nuts etc. When you skip for long, you may also have the tendency to overeat during dinner which eventually might also result in weight gain. Hence ensure you are eating something healthy through the day so that the metabolism is also kept in check.
Next Steps
Carry fruits and nuts regularly. Drink sufficient water through the day. Eat short snacks such as omelettes, sprouts, corn etc so that you don't leave huge gap.