how to add multiple key value pairs to dictionary Swift
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This is how dictionary works:
In computer science, an associative array, map, symbol table, or dictionary is an abstract data type composed of a collection of (key, value) pairs, such that each possible key appears at most once in the collection.
So
var cart = [String:String]()
cart["key"] = "one"
cart["key"] = "two"
print(cart)
will print only "key" - "two" part. It seems that you may need an array of tuples instead:
var cart = [(String, String)]()
cart.append(("key", "one"))
cart.append(("key", "two"))
print(cart)
will print both pairs.
Author by
user3462448
Updated on July 12, 2022Comments
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user3462448 almost 2 years
okay, i'm trying to have the user add a key and value pair to a dictionary i created and have it show up in a table view. i do that just fine but i cant seem to figure out how to add another pair. when i go to add another it replaces the last one. id really like to have multiple pairs. can someone help please?
heres my code:
//declaring the dictionary var cart = [String:String]() //attempting to add to dictionary cart[pizzaNameLabel.text!] = formatter.stringFromNumber(total)