javascript - 以下 javascript 函数发生了什么

Question

below i have given a javascript code picture `` can any one help me in this code. what do this code. help me in this

function(){
    var _ = function()
        // The arguments object is an array-like object. It has a length property 
        // that corresponds to the number of arguments passed into the function
    { 
        var r={},a=arguments; 
        for(var i=0; i<a.length; i+=2)
            r[a[i]]=a[i+1];
        return r;
    }
}

Answer 1

下面是使用一些参数的脚本示例。

var _ = function() { 

  var r = {};
  var a = arguments; 

  for(var i=0; i<a.length; i+=2) {
     r[a[i]]=a[i+1]; 
  }
  console.log(r);
  return r; 
  
}

_('a','1','b','2');