Example of "too sharp" for/in loop usage in JavaScript

Enhanced for loops in Java are very useful

Copy the codeThe code is as follows:

 
for (String str : list) { 
(str);// where str is directly the element in the collection
} 

But the for/in loop provided for us in JavaScript is no longer that simple

Copy the codeThe code is as follows:

 
var car 
var garage= new Array() 
garage[0] = "BMW"
garage[1] = "Mercedes-Benz"
garage[2] = "Bentley"
for (car in garage) 
{ 
(garage[car] + " ") 
} 
//Output result: BMW Mercedes-Benz Bentley

It looks like I've got my car list

But now I have higher demands on my garage and I want it to be locked and cleaned on its own

then

Copy the codeThe code is as follows:

 
var car 
var garage= new Array() 
garage[0] = "BMW"
garage[1] = "Mercedes-Benz"
garage[2] = "Bentley"
 = true 
 = function(){ 
alert("clean")
} 
for (car in garage) 
{ 
(garage[car] + " ") 
} 
//Output result: BMW Mercedes-Benz Bentley true function (){ alert("clean") }

OK, it said everything it knows

In order to avoid this embarrassment, we had to use the original for loop to return to the original for loop

Copy the codeThe code is as follows:

 
var car 
var garage= new Array() 
garage[0] = "BMW"
garage[1] = "Mercedes-Benz"
garage[2] = "Bentley"
 = true 
 = function(){ 
alert("clean")
} 
for (car = 0;car < ;car++) 
{ 
(garage[car] + " ") 
} 
//Output result: BMW Mercedes-Benz Bentley

Yes, it's much better now.