go - Why golang don't iterate correctly in my for loop with range? -


I am confused why the repeated value of the following code is not printed. 

  test: = [] int {0,1,2,3,4} for i, class = test {go func () {fmt.Println (i, v) }}   
 What do I think should print it  
  0 0 2 2 3 3 4 4   < P> But instead, it was printed  
  4 4 4 4 4 4 4 4   
 Post-text "itemprop =" text "> 
 Your Goroutines variables do not capture the current value of  i  and  v , rather they refer to variables themselves In this case, till the end of five, 5 spanded goratin NSA were not fixed, so all  i  and  v  The final values ​​were printed on.  
 If you want to obtain the current values ​​of some variables for gorotine, you can modify the code to read some of the following:  
  go Func (i, v int) {fmt.println (I, v)} (i, v)   
 Now each gouroutine has its own copy, which it is at the time it was created Holds the value.

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