So in Go,
The meaning of "declare" is allocate memory for a variable and initialize
the variable explicitly or implicitly.
e.g.
var a int = 3 // "a" is explicitly initialized
var b int // "b" is implicitly initialized
The meaning of "assign" is give a copy of a value to a variable
e.g.
a = 300 // "a" gets the copy of "300"
b = a // "b" gets the copy of "300" of "a"
2019年2月1日金曜日 9時48分34秒 UTC+9 伊藤和也:
>
> When initializing variables, If the copies of values are made, their
> memory usages will be:
>
> var a = [3]int8{2, 4, 6}
>> | |
>
> 3 bytes + 3 bytes = 6 bytes
>
>
> var b = []int8[2, 4, 6}
>> | |
>> 24 bytes + 24 bytes = 48 bytes
>
>
> var c = func() {}
>> | |
>> 8 bytes + 8 bytes = 16 bytes
>
>
> var d = struct{n1 int, n2 int}{1, 2}
>> | |
>> 16 bytes + 16 bytes = 32 bytes
>
>
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