JavaScript：如何组合两个不同但非常相似的函数？

Question

在这两个函数中；

• url 路径发生变化。
• 取决于不同的url路径；函数parameters 是变化。

我尝试了几种命名和用法来组合这些功能，但都没有成功！我怎样才能只使用一个功能？提前致谢。

function RunTestCases (name, foo, folder, host) {
    host = host || DynamicHost();
    folder = folder || 'FooFolderPath';

    return {
        title: name,
        hostPageUrl: host,
        url: folder + foo + '/'+ name +'.T.js'
    };
}

function RunMonkeyTestCase (name, folder, host) {
    host = host || DynamicHost();
    folder = folder || 'FooFolderPath';

    return {
        title: name,
        hostPageUrl: host,
        url: folder + name +'.T.js'
    };
}

//Usage of Functions;
RunTestCases('NameParam', 'FooParam');
RunMonkeyTestCase('NameParam', 'BarFolderPath', 'BarHostParam');

//For some specific usages.
RunTestCases('NameParam', 'FooParam', 'BarFolderPath', 'BarHostParam');
RunMonkeyTestCase('NameParam', null, 'FooHostParam');

Answer 1

您需要将功能合二为一吗？试试看。

function Test (title, foo, folder = 'FooFolderPath', hostPageUrl = DynamicHost()) {
  return {
    title,
    hostPageUrl,
    url: folder + (foo ? foo + '/' : '') + title + '.T.js'
  };
}

//Usage of Functions;
Test('NameParam', 'FooParam')
Test('NameParam', null, 'BarFolderPath', 'BarHostParam')

Answer 2

看起来foo 参数是不同的。我会使用它，但您需要更改参数顺序：

function RunTestCases (name, folder, host,foo) 
  {
  host = host || (foo? 'FooHostParam' : DynamicHost()) ;
  folder = folder || foo? 'FooFolderPath' : 'BarFolderPath')
  const url = (foo? (folder + foo + '/' + name +'.T.js') : (folder + name +'.T.js'));
  return {
      title: name,
      hostPageUrl: host,
     url
  };
}

Answer 3

在两个函数中保持参数顺序相同，然后最后在参数中添加foo，然后执行如下操作：

function TestCase(name, folder, host, foo) {
  host = host || DynamicHost();
  folder = folder || 'FooFolderPath';
  let url;
  if (foo) {
    url = folder + foo + '/' + name + '.T.js';
  } else {
    url = folder + name + '.T.js'
  }

  return {
    title: name,
    hostPageUrl: host,
    url: url
  };

}

console.log(TestCase('NameParam', 'BarFolderPath', 'BarHostParam', 'FooParam'));

console.log(TestCase('NameParam', 'BarFolderPath', 'BarHostParam'));

console.log(TestCase('NameParam', 'FooParam', 'BarFolderPath', 'BarHostParam'));

console.log(TestCase('NameParam', 'FooHostParam'));

Answer 4

function RunTest (name, folder, host, foo) {
    host = host || (foo ? DynamicHost() : 'FooHostParam');
    folder = folder || 'FooFolderPath';

    returnVal = {
        title: name,
        hostPageUrl: host,
    };

    returnVal.url = foo ? folder + name +'.T.js' : folder + foo + '/'+ name +'.T.js';

    return returnVal;
}