go-map-init

comparison between map initialization

tags: learning go programming diff-between

content

var m map[int]int

• returns map[int]int
• value of m is nil (nil map)
• readable, not writable, m[1] = 1 gives error m =: new(map[int]int)
• returns *map[int]int, it’s a pointer
• value of m is the address of a nil map
• readable, not writeable m =: make(map[int]int)
• returns map[int]int, not a pointer
• value of m is an empty map, NOT a nil map
• readable, writable. m[1] = 1 works

up

• go-make
• go-make-new-map

down

reference