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JavaScript：未命名函数的参数(JavaScript: parameters for unnamed functions)

 在下面的jQuery JavaScript代码中，参数“e”在函数内具有什么值？ 我很难理解这个，因为这个函数不能在代码的其他地方传递一个参数，所以如何让参数有效？ 我怎样才能在这些没有命名的函数中使用参数，而不是在代码的其他地方调用？  
    $(document).ready( function() { 
        $('div').each(function() {
            $(this).click(function(e){
                //some code
            });
        });
    });

In the following jQuery JavaScript code, what value does the parameter "e" take on within the function? I'm having difficulty understanding this because this function cannot be passed an argument elsewhere in the code so how would having a parameter work? And how would I use parameters in such functions that are not named and not called anywhere else in the code? 
    $(document).ready( function() { 
        $('div').each(function() {
            $(this).click(function(e){
                //some code
            });
        });
    });

原文：https://stackoverflow.com/questions/419144

更新时间：2023-03-26 20:03

最满意答案

 我相信你需要通过matplotlib.use()函数将matplotlib后端更改为wx，以便在wx图形中嵌入matplotlib图。  
 这是我在您的脚本中更改的内容：  
import matplotlib
matplotlib.use('WX')
import matplotlib.pyplot as plt
 
 这在测试后产生了以下图像：  
   
 控制台输出：  
Initialize subplots
Creating ax1
Creating ax2
Creating ax3
Creating ax4
***** Saving plot to: /Users/luccary/Downloads/foo/Test_[0].png
/Users/luccary/.virtualenvs/numpy/lib/python2.7/site-packages/matplotlib/cbook.py:136: MatplotlibDeprecationWarning: The WX backend is deprecated. It's untested and will be removed in Matplotlib 2.2. Use the WXAgg backend instead. See Matplotlib usage FAQ for more info on backends.
  warnings.warn(message, mplDeprecation, stacklevel=1)
Test Done
 
 请注意弃用警告，因为wx将作为Matplotlib 2.2中的后端删除，您应该使用wxagg代替。  
 参考文献：请参阅此matplotlib教程 ，我在此处阅读了类似问题的Stack Overflow回答后找到了该教程 。  
 希望这能回答你的问题。 祝你好运！ 

I believe you need to change the matplotlib backend to wx via the matplotlib.use() function in order to embed matplotlib plots within wx graphics. 
Here's what I changed in your script: 
import matplotlib
matplotlib.use('WX')
import matplotlib.pyplot as plt
 
This produced the following image after testing: 
 
Console output: 
Initialize subplots
Creating ax1
Creating ax2
Creating ax3
Creating ax4
***** Saving plot to: /Users/luccary/Downloads/foo/Test_[0].png
/Users/luccary/.virtualenvs/numpy/lib/python2.7/site-packages/matplotlib/cbook.py:136: MatplotlibDeprecationWarning: The WX backend is deprecated. It's untested and will be removed in Matplotlib 2.2. Use the WXAgg backend instead. See Matplotlib usage FAQ for more info on backends.
  warnings.warn(message, mplDeprecation, stacklevel=1)
Test Done
 
Please note the deprecation warning, since wx will be removed as a backend in Matplotlib 2.2, and you should likely use wxagg instead. 
References: See this matplotlib tutorial which I found after reading a Stack Overflow answer to a similar question here. 
Hope that answers your question. Good luck!

JavaScript：未命名函数的参数(JavaScript: parameters for unnamed functions)

最满意答案

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