Example object pooling code written for the Script-8

script-8-important-object-pooling.js

function fireProjectiles(input,player, projectiles) {
  if(input.startPressed) {
    const availableProjectiles = projectiles.filter( projectile => projectile.visible === false);
    const nextProjectile =  (availableProjectiles !== null && availableProjectiles.length > 0) ? availableProjectiles[0] : null
    
   
    
    if(nextProjectile !== null) {
      nextProjectile.visible = true
      nextProjectile.x = player.x + 3
      nextProjectile.y = player.y
      nextProjectile.dx = PROJECTILESPEED 
    }
  }
}

function updateProjectiles(projectiles) {
  projectiles.forEach(projectile => {
    projectile.x += projectile.dx
  })
}

function poolPlayerProjectiles(projectiles) {
  projectiles.forEach(projectile => {
    if(projectile.x > 128) { 
      projectile.visible = false
      projectile.dx = 0
    }
  })
}