make 和 new 都是用来创建对象和初始化内存的。在实际使用场景中还是有一些不同的。
new
new 源码注释
// The new built-in function allocates memory. The first argument is a type,
// not a value, and the value returned is a pointer to a newly
// allocated zero value of that type.
func new(Type) *Type
在源码注释中我们可以看出 new 的功能：输入一个类型，不能是值，返回一个指向该类型零值的指针。
make
make 源码注释
// The make built-in function allocates and initializes an object of type
// slice, map, or chan (only). Like new, the first argument is a type, not a
// value. Unlike new, make's return type is the same as the type of its
// argument, not a pointer to it. The specification of the result depends on
// the type:
// Slice: The size specifies the length. The capacity of the slice is
// equal to its length. A second integer argument may be provided to
// specify a different capacity; it must be no smaller than the
// length. For example, make([]int, 0, 10) allocates an underlying array
// of size 10 and returns a slice of length 0 and capacity 10 that is
// backed by this underlying array.
// Map: An empty map is allocated with enough space to hold the
// specified number of elements. The size may be omitted, in which case
// a small starting size is allocated.
// Channel: The channel's buffer is initialized with the specified
// buffer capacity. If zero, or the size is omitted, the channel is
// unbuffered.
func make(t Type, size ...IntegerType) Type
在源码注释中我们可以看出 make 的功能：输入一个类型（必须是slice、map、chan），返回一个按指定条件初始化后的类型对象。
主要区别
其实感觉没什么太大关系，都是内置的初始化函数，new 返回指针，make 只能用于特定类型。
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本文作者: Czasg
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