#####   ######  #####    ###    #   #  ###  #   #  ######
##  ##  ##      ##  ##  ## ##   #   #   #   #   #  ##
#####   ####    #####   #   #   #   #   #   #   #  ####
##  #   ##      ##      ## ##    # #    #    # #   ##
##   #  ######  ##       ###      #    ###    #    ######

$ curl repovive.com/roadmaps/go/maps/adding-and-updating

░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░████████████████████████████████████████████████████████

#####   ######  #####    ###    #   #  ###  #   #  ######
##  ##  ##      ##  ##  ## ##   #   #   #   #   #  ##
#####   ####    #####   #   #   #   #   #   #   #  ####
##  #   ##      ##      ## ##    # #    #    # #   ##
##   #  ######  ##       ###      #    ###    #    ######

$ curl repovive.com/roadmaps/go/maps/adding-and-updating

Repovive

Adding and Updating - Maps | Go | Repovive

Repovive.

Go10 sections · 431 units20h total

Open in Course

Adding and Updating

Setting values

Add or update entries using bracket notation:

ages := make(map[string]int)
ages["Alice"] = 30  // add new entry
ages["Bob"] = 25    // add another
ages["Alice"] = 31  // update existing

If the key exists, the value is replaced. If it doesn't exist, a new entry is created. The syntax is the same either way. Maps grow automatically as you add entries.