http://play.golang.org/p/wYgfLLQYdm
See example above. In my example the variable change does not last after the method is executed. How can I change a struct variable's value with a struct method?
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1 Answer
Your method receiver is a value, not a pointer.
That means those methods like switch_width_height() operate on a copy of the object.
See also:
- FAQ "Should I define methods on values or pointers?".
- "Don't Get Bitten by Pointer vs Non-Pointer Method Receivers in Golang"
- "Go 101: Methods on Pointers vs. Values"
- "Go Bootcamp "
Add a '*':
func (s *square) switch_width_height()
And it will work as expected: see play.golang.org.
