JS中的意外EOF错误答案

【问题标题】：unexpected EOF error in JSJS中的意外EOF错误
【发布时间】：2018-08-06 08:48:18
【问题描述】：

我正在为遗传算法编写这段代码，但是当我运行这段代码时，我在绘制函数之后不断收到意外的 EOF 错误。

SyntaxError: 预期 eof 但找到 }

我不太擅长 javascript，所以我不知道我是否犯了愚蠢的错误或什么。在我改变某些东西之前它似乎工作正常？我不知道，但它不再起作用了，也许我只是没有看到它......

var population;
var lifespan = 200;
var lifeP;
var count = 0;

function setup() {
  createCanvas(400,300);
  rocket = new Rocket();
  population = new Population();
  lifeP = createP();
}

function draw() {
  background(0); 
  population.run();
  lifeP.html(count);
  count++;
}

function Population() {
 this.rockets = [];
 this.popsize = 25;


 for(var i = 0; i < this.popsize; i++){
  this.rockets[i] = new Rocket(); 
 }

 this.run = function() {
   for(var i = 0; i < this.popsize; i++){
    this.rockets[i].update();
    this.rockets[i].show();
   }
 }
}


function DNA(){
 this.genes = [];
 for (var i = 0; i < lifespan; i++){
   this.genes[i] = p5.Vector.random2D();
   this.genes[i].setMag(0.1);
 }
}

function Rocket(){
 this.pos = createVector(width/2, height);
 this.vel = createVector();
 this.acc = createVector();
 this.dna = new DNA();;
 this.applyForce = function(force){
  this.acc.add(force);   
 }

 this.update = function(){
  this.applyForce(this.dna.genes[count]);

  this.vel.add(this.acc);
  this.pos.add(this.vel);
  this.acc.mult(0);
 }

 this.show = function(){
  push();
  noStroke();
  fill(255, 150);
  translate(this.pos.x, this.pos.y); 
  rotate(this.vel.heading());
  rectMode(CENTER);
  rect(0, 0, 25, 5);
  pop();
 }


}

【问题讨论】：

标签： javascript syntax-error genetic-algorithm eof

【解决方案1】：

你的火箭类应该是这样的：

function Rocket(){
 this.pos = createVector(width/2, height);
 this.vel = createVector();
 this.acc = createVector();
 this.dna = new DNA();
 this.applyForce = function(force){
  this.acc.add(force);   
 }

 this.update = function(){
  this.applyForce(this.dna.genes[count]);

  this.vel.add(this.acc);
  this.pos.add(this.vel);
  this.acc.mult(0);
 }

 this.show = function(){
  push();
  noStroke();
  fill(255, 150);
  translate(this.pos.x, this.pos.y); 
  rotate(this.vel.heading());
  rectMode(CENTER);
  rect(0, 0, 25, 5);
  pop();
 }
}

但是下次，请在编辑器中检查您的代码，例如 jsfiddle 不要向stackoverflow发送垃圾邮件

【讨论】：