在javascript中按字符串名称设置变量？

显然，这不起作用。如果我只想获取变量的值，而不是设置它，那么它就可以工作

//window["Fluent"]["Include"]

function setGlobalVariableByName(name,value)
{
    var indexes = name.split(".");
    var variable = null;
    $.each(indexes, function()
    {
        if (variable == null){
            variable = window[this];
        }else{
            variable = variable[this];
        }
    });

    variable = value;
}

setGlobalVariableByName("Fluent.Include.JqueryPulse",true);
console.log(Fluent.Include.JqueryPulse) // prints false

如果不使用eval，我如何实现这样的目标？
我想，我需要一些方法以编程方式将数组索引添加到这个函数中

---

下面的工作，你能建议一个更好的方法来编码，以使它更干燥

window["Fluent"]["Include"]["JqueryPulse"] = true;
console.log(Fluent.Include.JqueryPulse) // prints true

---

你需要打电话

setGlobalVariableByName : function(name, value)
{
    var indices = name.split(".");
    var last = indices.pop();
    var parent;
    $.each(indices, function(i)
    {
        if (!parent){
            parent = window[this];
        }else{
            parent = variable[this];
        }
    }); 
    if (!parent){
        window[last] = value;
    }else{
        parent[last] = value;
    }
}

不知怎么的。因此，您需要在记录姓氏之前中断拆分字符串的循环，然后分配值

最后，您需要致电：

variable[this] = value 

---

最终，您只需构建一个对象链，并将链中的最后一项设置为值。此外，我还将添加一个检查，以确保已经是对象的项不会被覆盖，从而使其现有属性不会丢失：

variable = window['Fluent']['Include']; // build this in a loop
variable['JqueryPulse'] = someValue; // then call this

但是，即使页面上有jQuery，我也不会使用jQuery。不需要为每个

索引执行函数的开销

//bootstrap the object for demonstration purposes--not necessary to make code work
window.Fluent = {
  Include: {
    foo: 'bar', //don't want to lose this'
    JqueryPulse: false //want to set this to true
  }
};

//define function
function setGlobalItemByName( name, value )
{
  var names,
      finalName,
      //no need to figure out if this should be assigned in the loop--assign it now
      currentOp = window;

  if( typeof name === 'string' && name !== '' )
  {
    names = name.split( '.' );
    //no need to track where we are in the looping--just pull the last off and use it after
    finalName = names.pop();

    $.each( names, function()
    {
      //If the current item is not an object, make it so. If it is, just leave it alone and use it
      if( typeof currentOp[this] !== 'object' || currentOp[this] === null )
      {
        currentOp[this] = {};
      }

      //move the reference for the next iteration
      currentOp = currentOp[this];
    } );

    //object chain build complete, assign final value
    currentOp[finalName] = value;
  }
}

//use function
setGlobalItemByName( 'Fluent.Include.JqueryPulse', true );


//Check that Fluent.Include.foo did not get lost
console.log( Fluent.Include.foo );
//Check that Fluent.Include.JqueryPulse got set
console.log( Fluent.Include.JqueryPulse );

//出于演示目的引导对象--不需要使代码正常工作
window.Fluent={
包括：{
foo:'酒吧'，//不想失去这个'
JqueryPulse:false//要将其设置为true吗
}
};
//定义函数
函数setGlobalItemByName（名称、值）
{
变量名称，
最终名称，
indexCount，
当前索引，
当前名称，
//不需要弄清楚是否应该在循环中分配它--现在就分配它
currentOp=窗口；
if（typeof name=='string'&&name！=''）
{
name=name.split（'.'）；
//不需要跟踪我们在循环中的位置——只需拔出最后一个，然后使用它
finalName=names.pop（）；
indexCount=names.length；
对于（currentIndex=0；currentIndex
它们确实存在，我只是这样解释了这个问题。变量
Fluent.Include.JqueryPulse
已经存在，值为false，我想将其设置为true。但是我不需要初始化任何东西这里有一个不同的版本：@Nico-你说，“变量Fluent.Include.JqueryPulse已经在那里了…”小心不要踩踏已经存在于该链中的对象，因为你会丢失它们的属性。请参阅我的答案和代码注释以避免该问题。
//bootstrap the object for demonstration purposes--not necessary to make code work
window.Fluent = {
  Include: {
    foo: 'bar', //don't want to lose this'
    JqueryPulse: false //want to set this to true
  }
};

//define function
function setGlobalItemByName( name, value )
{
  var names,
      finalName,
      //no need to figure out if this should be assigned in the loop--assign it now
      currentOp = window;

  if( typeof name === 'string' && name !== '' )
  {
    names = name.split( '.' );
    //no need to track where we are in the looping--just pull the last off and use it after
    finalName = names.pop();

    $.each( names, function()
    {
      //If the current item is not an object, make it so. If it is, just leave it alone and use it
      if( typeof currentOp[this] !== 'object' || currentOp[this] === null )
      {
        currentOp[this] = {};
      }

      //move the reference for the next iteration
      currentOp = currentOp[this];
    } );

    //object chain build complete, assign final value
    currentOp[finalName] = value;
  }
}

//use function
setGlobalItemByName( 'Fluent.Include.JqueryPulse', true );


//Check that Fluent.Include.foo did not get lost
console.log( Fluent.Include.foo );
//Check that Fluent.Include.JqueryPulse got set
console.log( Fluent.Include.JqueryPulse );

//bootstrap the object for demonstration purposes--not necessary to make code work
window.Fluent = {
  Include: {
    foo: 'bar', //don't want to lose this'
    JqueryPulse: false //want to set this to true
  }
};

//define function
function setGlobalItemByName( name, value )
{
  var names,
      finalName,
      indexCount,
      currentIndex,
      currentName,
      //no need to figure out if this should be assigned in the loop--assign it now
      currentOp = window;

  if( typeof name === 'string' && name !== '' )
  {
    names = name.split( '.' );
    //no need to track where we are in the looping--just pull the last off and use it after
    finalName = names.pop();

    indexCount = names.length;
    for( currentIndex = 0; currentIndex < indexCount; currentIndex += 1 )
    {
      currentName = names[currentIndex];

      //If the current item is not an object, make it so. If it is, just leave it alone and use it
      if( typeof currentOp[currentName] !== 'object' || currentOp[currentName] === null )
      {
        currentOp[currentName] = {};
      }

      //move the reference for the next iteration
      currentOp = currentOp[currentName];
    }

    //object chain build complete, assign final value
    currentOp[finalName] = value;
  }
}

//use function
setGlobalItemByName( 'Fluent.Include.JqueryPulse', true );


//Check that Fluent.Include.foo did not get lost
console.log( Fluent.Include.foo );
//Check that Fluent.Include.JqueryPulse got set
console.log( Fluent.Include.JqueryPulse );