我正在尝试运行命令rake db:migrate,但终端抱怨文件ruby_executable_hooks中可能存在语法错误.我找到了这个参考但没有帮助我解决问题.在文件的第一行,它看起来像title ="ruby#{ARGV*""}"导致问题,因为双引号没有正确转义.我尝试了不同的逃避组合,但仍然没有运气.所以现在我不确定问题是否真的与逃避问题或其他问题有关.非常感谢
请看下面的ruby_executable_hooks文件
title = "ruby #{ARGV*" "}"
$0 = ARGV.shift
Process.setproctitle(title) if Process.methods.include?(:setproctitle)
require 'rubygems'
begin
require 'executable-hooks/hooks'
Gem::ExecutableHooks.run($0)
rescue LoadError
warn "unable to load executable-hooks/hooks" if ENV.key?
('ExecutableHooks_DEBUG')
end
eval File.read($0), binding, $0
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错误信息:
/Users/username/.rvm/gems/ruby-2.2.3/bin/ruby_executable_hooks:15:in `eval':
/Users/username/.rvm/rubies/ruby-2.2.3/bin/rake:4: syntax error, unexpected
tSTRING_BEG, expecting keyword_do or '{' or '(' (SyntaxError)
exec "$bindir/ruby" -x "$0" "$@"
^
from /Users/username/.rvm/gems/ruby-2.2.3/bin/ruby_executable_hooks:15:in
`<main>'
Run Code Online (Sandbox Code Playgroud) 我需要了解超级密钥和复合密钥之间的区别.我发现的例子让人更加困惑.你能简单地澄清一下有什么区别吗?谢谢
我知道有很多与我的问题类似的问题/答案,但我仍然无法通过测试解决这个问题。
问题: 我试图模拟 Settings 类,但 Mockito 抱怨这一行:
when(settings.settingsBuilder().put(new String("test"), "test").build()).thenReturn(settings)
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任务方法调用异常:
org.mockito.exceptions.misusing.MissingMethodInvocationException:
when() requires an argument which has to be 'a method call on a mock'.
For example:
when(mock.getArticles()).thenReturn(articles);
Also, this error might show up because:
1. you stub either of: final/private/equals()/hashCode() methods.
Those methods *cannot* be stubbed/verified.
Mocking methods declared on non-public parent classes is not supported.
2. inside when() you don't call method on mock but on some other object.
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我尝试了多种可能的方法,但没有结果。下面是实际测试方法。
@RunWith(PowerMockRunner.class)
@PrepareForTest({Settings.class, Client.class})
public class AddressMatcherElasticTest { …Run Code Online (Sandbox Code Playgroud) 我无法理解下面的代码.clear方法删除分配给"al"的所有元素吧?然后ArrayList al接收字符串Str2的值,alal接收Str3的值.
那么如果仅使用Str3分配alal,那么输出如何如下呢?有人可以解释一下吗?非常感谢
OUTPUT:
[String 2]
[[String 2],String 3]
public static void main(String[] args){
String Str1 = "String 1";
String Str2 = "String 2";
String Str3 = "String 3";
ArrayList al = new ArrayList();
ArrayList alal = new ArrayList();
al.add(Str1);
alal.add(al);
al.clear();
al.add(Str2);
alal.add(Str3);
System.out.println(al);
System.out.println(alal);
}
Run Code Online (Sandbox Code Playgroud) 如果给出n = 20,则下面的方法返回5.
我的问题是每次迭代1如何递增?
mystery(10) + 1
= mystery(5) + 2
= mystery(2) + 3
= mystery(1) + 4
= mystery(0) + 5 = 5.
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我在递归方面遇到了一些困难.
public static int mystery(int n){
if(n <= 0){
return 0;
}else{
return mystery(n / 2 ) + 1;
}
}
Run Code Online (Sandbox Code Playgroud) 我需要在Scala and Play框架中创建以下JSON对象,但遇到了麻烦:
{"employees":[
{"firstName":"John", "lastName":"Doe"}
]}
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用于创建对象的数据来自html表单(已实现)。到目前为止,我的代码创建了以下内容:
val json: JsValue = Json.toJson(formContent)
//returns = {"firstName":"John", "lastName":"Doe"}
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如何将关键的“员工”添加到该对象?
谁能帮我?
谢谢
嗨,我正在尝试理解下面的递归方法,但它似乎太混乱了.我知道reversePrint方法称之为自我,但问题是,第一次运行它应该打印bcdef + a = bcdef.这是我感到困惑的地方,下次运行时b成为charAt(0)......所以在哪里?他们是否暂时存储在某个地方?有人可以帮我理解它.非常感谢
public static void main(String[] args) {
// TODO code application logic here
System.out.println(reversePrint("abcdef"));
}
public static String reversePrint(String s) {
if (s.length() <= 1) {
return s;
}
return reversePrint(s.substring(1)) + s.charAt(0);
}
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