Go語言中new跟make是內置函數，主要用來創建分配類型內存。
new( )
new(T)創建一個沒有任何數據的類型為T的實例，並返回該實例的指針；
源碼解析
func new
func new(Type) *Type
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.
make( )
make(T, args)只能創建 slice、map和channel，並且返回一個有初始值args（非零）的T類型的實例，非指針。
源碼解析
func make
func make(Type, size IntegerType) Type
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, so make([]int, 0, 10) allocates a slice of length 0 and
capacity 10.
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.
二者異同
二者都是內存的分配（堆上），但是make只用於slice、map以及channel的初始化（非零值）；而new用於類型的內存分配，並且內存置為零。所以在我們編寫程序的時候，就可以根據自己的需要很好的選擇了。
make返回的還是這三個引用類型本身；而new返回的是指向類型的指針。
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