在Golang中初始化地图的更好方法是哪种？ [重复]

Question

This question already has an answer here:

• Creating map with/without make 1 answer

As map is a reference type. What is difference between:?

m := make(map[string]int32)

and

m := map[string]int32{}

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Answer 1

One allows you to initialize capacity, one allows you to initialize values:

// Initializes a map with space for 15 items before reallocation
m := make(map[string]int32, 15)

vs

// Initializes a map with an entry relating the name "bob" to the number 5
m := map[string]int{"bob": 5} 

For an empty map with capacity 0, they're the same and it's just preference.