Question

class Message_Board:

   def __init__(self,name):
       self.messages = []

   def add_message(self, message=None, text='', author='Unknown'):
      if(message == None):
         self.messages = Message(text, author) ###
      else:
         self.messages.append(message) ###

我在使用add_message方法时遇到问题，特别是我标记为###的两行。我希望能够向self.messages添加一个消息对象，使用的能够以两种不同的方式放置消息。如果传入消息对象，则应忽略文本和作者，但如果未传入对象，则应使用文本和作者创建新对象。我不想更改原始def add_message()行。

Answer 1

在两种情况下都使用class Message_Board: def __init__(self,name): self.messages = [] def add_message(self, message=None, text='', author='Unknown'): if message is None: self.messages.append(Message(text, author)) else: self.messages.append(message)：

// Population
var Gene = function(text){
    if(text){
        this.text = text;
    }
};

Gene.fitness = 0;
Gene.generation = 0;

var word = new Gene('Hello');

// This is where it crashes!!
// Make elements
var genArr = [];
var population = 20;
var mutation = 0;
for(var i = 0; i < population; i++){
   var gene = "";
    var abc = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
    for (var j = 0; i < word.text.length; j++) {
        var element = abc.charAt(Math.floor(Math.random() * abc.length));
        gene += element;
    }
    genArr.push(gene);
}

// Divide them - fitness
// 1/20 - 0.05% each
var fitElements = [];
for (var i = 0; i < genArr.length; i++) {
    var score = 0;
    var curWord = Array.from(genArr[i]);
    for (var j = 0; j < word.text.length; j++) {
        if(genArr[j].substr(j, 1) == word.text.substr(j, 1)){
            score += 1;
        }
    }
    if(score > 0){
        fitElements.push([genArr[i], (score * (1 / population)) ** 2]);
    }
}

for (var i = 0; i < fitElements.length; i++) {
    console.log('Element: ' + fitElements[i][0] + ', Score: ' + fitElements[i][1]);
}

将对象添加到类中的列表

1 个答案: