Question

我正在Codeacademy学习javascript，我正在尝试从提示输入中计算字符串长度，并为每个答案显示自定义提醒。以下是我到目前为止的情况：

var answer = prompt('What is your surname?').length;

var responses = {
answer > 5: 'Your name has fewer than five characters',
answer < 5: 'Your name has more than five characters',
defaultResponse: 'You didn\'t answer?'
}

alert(responses[answer] || responses.defaultResponse);

我应该在这里放置if语句吗？或者 Switch 会更好吗？

Answer 1

这是一个干净的方法：

<VirtualHost *:80>
    ServerAdmin erik@murmillosoftware.com
    ServerName murmillosoftware.com
    ServerAlias www.murmillosoftware.com
    DocumentRoot /var/www/html
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

对于类似的事情，我不会打扰开关。

Answer 2

如果你想使用一个对象来查找答案，你可以这样做

var answer = prompt('What is your surname?').length;

var responses = {
more: 'Your name has more than five characters',
less: 'Your name has fewer than five characters',
default: 'You didn\'t answer?'
}

alert(answer == 0 && responses.default || answer < 5 && responses.less || answer > 5 && responses.more);

Javascript提示计算字符串长度

2 个答案: