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submitted by /u/Dear-Economics-315 [link] [留言]

Want to turn a small ESP32 board into a mini arcade game you can actually play? This ESP32 OLED Mini Shooter Game uses a 128x64 OLED display and two push buttons to create a simple shooter experience. The player moves left and right, bullets fire upward, and enemies fall from the top of the screen. It is a small project, but it already feels like a real handheld game once the display starts updating. This build is a great next step after basic OLED and button tutorials. Instead of only printing text or drawing one shape, the code manages several moving objects at the same time. It tracks the player, bullets, enemies, collisions, and game-over state. The screen is divided into a simple grid. The 128x64 OLED becomes a 16x8 playfield, where each tile is 8x8 pixels. This makes object movement easier to understand because the player, enemies, and bullets move by grid position instead of raw pixel math. Why build it? This project teaches interactive programming on real hardware. The ESP32 reads button input, updates game objects, checks collisions, and draws the next frame on the OLED. That is much more active than a normal sensor display project. It also teaches timing without blocking the whole game flow. The code uses millis() to control when bullets and enemies update, so they can move at different speeds. This is useful because many embedded projects need timed actions without stopping everything else. What you'll learn ESP32 OLED display control - drawing text, squares, circles, and game objects on an SSD1306 screen. Custom I2C pins - using Wire.begin(5, 19) so the OLED uses GPIO5 for SDA and GPIO19 for SCL. Button input handling - reading two push buttons for left and right movement. Debounce logic - preventing one press from being counted many times. Grid-based game design - turning a 128x64 screen into a simple 16x8 game map. Game object arrays - storing multiple bullets and enemies with active/inactive states. Timer-based updates - using millis() to move bullets

We've gone from A to Z to find Amazon's best Prime Day deals on the gear worth owning.

submitted by /u/fagnerbrack [link] [留言]

TL;DR Welcome back to Dev Opportunity Radar. This is a weekly series where I share opportunities,...

I just published Fintech Engineering Handbook distilled from 6 years of tears, sweat and swears. It’s a free ~25-page resource with various hints and patterns around handling money in software systems. Tell me what you think! submitted by /u/Krever [link] [留言]

JavaScript Array Search Methods What are Array Search Methods? Array Search Methods are used to: Find the position (index) of an element. Check whether an element exists. Retrieve an element that satisfies a condition. Find the index of an element that matches a condition. Search from the beginning or the end of an array. Common Array Search Methods Method Purpose Returns indexOf() Finds the first occurrence of a value Index or -1 lastIndexOf() Finds the last occurrence of a value Index or -1 includes() Checks whether a value exists true / false find() Finds the first matching element Element or undefined findIndex() Finds the index of the first matching element Index or -1 findLast() (ES2023) Finds the last matching element Element or undefined findLastIndex() (ES2023) Finds the last matching index Index or -1 1. Array.indexOf() Definition The indexOf() method searches an array for a specified value and returns the index of its first occurrence . If the value is not found, it returns -1 . Syntax array . indexOf ( searchElement ) array . indexOf ( searchElement , startIndex ) Parameters Parameter Description searchElement Value to search for startIndex (optional) Index where the search starts Returns Index of the first matching element. -1 if not found. Internal Working Suppose: let fruits = [ " Apple " , " Orange " , " Mango " , " Orange " ]; Memory: Index 0 → Apple 1 → Orange 2 → Mango 3 → Orange When: fruits . indexOf ( " Orange " ); JavaScript starts from index 0 : Apple ❌ Orange ✅ Found Stops immediately and returns: 1 Example let fruits = [ " Apple " , " Orange " , " Banana " ]; console . log ( fruits . indexOf ( " Orange " )); Output 1 Example - Not Found let fruits = [ " Apple " , " Orange " ]; console . log ( fruits . indexOf ( " Mango " )); Output -1 Example - Start Position let fruits = [ " Apple " , " Orange " , " Banana " , " Orange " ]; console . log ( fruits . indexOf ( " Orange " , 2 )); Output 3 Real-Time Example Suppose an e-commerce site wants to