iOS repl.it - Dictionaries Challenge Solution

dictionaries.swift

//Don't change this
var stockTickers: [String: String] = ["APPL" : "Apple Inc", "HOG": "Harley-Davidson Inc", "BOOM": "Dynamic Materials", "HEINY": "Heineken", "BEN": "Franklin Resources Inc"]

//Write your code here.
stockTickers["WORK"] = "Slack Technologies Inc"
stockTickers["BOOM"] = "DMC Global Inc"



//Don't modify this
print(stockTickers["WORK"]!)
print(stockTickers["BOOM"]!)

I see this exercise's purpose was to have use research the answer but the instructions weren't clear. After reviewing the solution above, it makes sense that the point of the challenge was to highlight how to use a function, using a dictionary, and redefining a variable. I see the value in pointing out the subtle syntax changes between the dictionary and redefining the variable however it could have been communicated in a more effective manner.

//MY SOLUTION -- however I did have to look up the answer and reverse engineer it so I can better understand it.

//Don't change this
var stockTickers: [String: String] = ["APPL" : "Apple Inc",
"HOG": "Harley-Davidson Inc",
"BOOM": "Dynamic Materials",
"HEINY": "Heineken",
"BEN": "Franklin Resources Inc"]

//Write your code here.

func updateMyTickers(){
stockTickers = ["WORK" : "Slack Technologies Inc"]
stockTickers["BOOM"] = "DMC Global Inc"
}
updateMyTickers()
// Don't modify this
print(stockTickers["WORK"]!)
print(stockTickers["BOOM"]!)

Func part still doesn't work. Quite confusing, trying to check for what was wrong, and nothing was wrong with my code.

var stockTickers: [String: String] = ["APPL" : "Apple Inc",
"HOG": "Harley-Davidson Inc",
"BOOM": "Dynamic Materials",
"HEINY": "Heineken",
"BEN": "Franklin Resources Inc"]

func updateMyTickers() {

stockTickers["WORK"] = "Slack Technologies Inc"

stockTickers["BOOM"] = "DMC Global Inc"

}

updateMyTickers()

print(stockTickers["WORK"]!)
print(stockTickers["BOOM"]!)

// i've maded like this and it's worked

I liked that solution. It worked beautifully. Thank you

var stockTickers = [String: String]()
func updateMyTickers(ticker: String, companyName: String) {
    
    stockTickers = ["APPL" : "Apple Inc",
                            "HOG": "Harley-Davidson Inc",
                            "BOOM": "Dynamic Materials",
                            "HEINY": "Heineken",
                             "BEN": "Franklin Resources Inc"]
    // iterating over just the keys before update/add
    for key in stockTickers.keys {
        // update an entry
        if(stockTickers[key] != nil) {
            stockTickers[ticker] = companyName
        } else {
            // add a new entry
            stockTickers[ticker] = companyName
        }
    }
    
}

updateMyTickers(ticker: "BOOM", companyName: "DMC Global Inc")
updateMyTickers(ticker: "WORK", companyName: "Slack Corporation")
print(stockTickers)

var stockTickers: [String: String] = ["APPL" : "Apple Inc", "HOG": "Harley-Davidson Inc", "BOOM": "Dynamic Materials", "HEINY": "Heineken", "BEN": "Franklin Resources Inc", ]

stockTickers["WORK"] = "Slack Technologies Inc"
stockTickers["BOOM"] = "DMC Global Inc"

I wrote :
stockTickers["WORK"] = "Slack Technologies Inc"
stockTickers.updateValue("DMC GLOBAL Inc", forKey:"BOOM")

however, I get an error "command not found" when I try to run the code, can anyone explain what I'm doing wrong? Do we need a function to update the tickers?

func exercise() {

//Don't change this
var stockTickers: [String: String] = [
    "APPL" : "Apple Inc", 
	"HOG": "Harley-Davidson Inc", 
	"BOOM": "Dynamic Materials", 
	"HEINY": "Heineken", 
	"BEN": "Franklin Resources Inc"
]

stockTickers["WORK"] = "Slack Technologies lnk"
stockTickers["BOOM"] = "DMC Global lnk"


 //Don't modify this
print(stockTickers["WORK"]!)
print(stockTickers["BOOM"]!)

}

//This Worked Properly
func exercise() {

//Don't change this
var stockTickers: [String: String] = [
    "APPL" : "Apple Inc", 
	"HOG": "Harley-Davidson Inc", 
	"BOOM": "Dynamic Materials", 
	"HEINY": "Heineken", 
	"BEN": "Franklin Resources Inc"
]

//Write your code here.

func updateMyTickers() {

stockTickers["WORK"] = "Slack Technologies Inc"

stockTickers["BOOM"] = "DMC Global Inc"

}

updateMyTickers()
//Don't modify this
print(stockTickers["WORK"]!)
print(stockTickers["BOOM"]!)
}

func exercise() {

    //Don't change this
    var stockTickers: [String: String] = [
      "APPL" : "Apple Inc", 
    	"HOG": "Harley-Davidson Inc", 
    	"BOOM": "Dynamic Materials", 
    	"HEINY": "Heineken", 
    	"BEN": "Franklin Resources Inc"
    ]
    
    //Write your code here. 👇

    stockTickers = [
      
    	"BOOM": "DMC Global Inc", 
    	"WORK": "Slack Technologies Inc", 
    	
    ]
  
     //Don't modify this
    print(stockTickers["WORK"]!)
    print(stockTickers["BOOM"]!)
}
 



// Don't change this
exercise()

This Worked for me , please don't take this serious :)

var stockTickers: [String: String] = ["APPL" : "Apple Inc", "HOG": "Harley-Davidson Inc", "BOOM": "Dynamic Materials", "HEINY": "Heineken", "BEN": "Franklin Resources Inc"]

func updateMyTickers() {

stockTickers["WORK"] = "Slack Technologies Inc"

stockTickers["BOOM"] = "DMC Global Inc"

}

updateMyTickers()

print(stockTickers["WORK"]!) print(stockTickers["BOOM"]!)

// i've maded like this and it's worked

//why did you use two dictionaries , when you can use only one

func exercise() {

//Don't change this
var stockTickers: [String: String] = [
  "APPL" : "Apple Inc", 
	"HOG": "Harley-Davidson Inc", 
	"BOOM": "Dynamic Materials", 
	"HEINY": "Heineken", 
	"BEN": "Franklin Resources Inc"
]

//Write your code here. 👇

stockTickers = [
  
	"WORK": "Slack Technologies Inc", 
	"BOOM": "DMC Global Inc", 
]

 //Don't modify this
print(stockTickers["WORK"]!)
print(stockTickers["BOOM"]!)

}

func exercise() {

//Don't change this
var stockTickers: [String: String] = [
    "APPL" : "Apple Inc",
    "HOG": "Harley-Davidson Inc",
    "BOOM": "Dynamic Materials",
    "HEINY": "Heineken",
    "BEN": "Franklin Resources Inc"]

  func updateMyTickers() {
    stockTickers["WORK"] = "Slack Technologies Inc"
    stockTickers.updateValue("DMC Global Inc", forKey: "BOOM")
 //Don't modify this
}
updateMyTickers()
print(stockTickers["WORK"]!)
print(stockTickers["BOOM"]!)

var stockTickers: [String: String] = [
"APPL" : "Apple Inc",
"HOG": "Harley-Davidson Inc",
"BOOM": "Dynamic Materials",
"HEINY": "Heineken",
"BEN": "Franklin Resources Inc"
]

func ubdateMyTickers(){
stockTickers["WORK"] = "Slack Technologies Inc"
stockTickers["BOOM"] = "DMC Global Inc"
}

ubdateMyTickers()

print(stockTickers["WORK"]!)
print(stockTickers["BOOM"]!)

var stockTickers: [String: String] = [
"APPL" : "Apple Inc",
"HOG": "Harley-Davidson Inc",
"BOOM": "Dynamic Materials",
"HEINY": "Heineken",
"BEN": "Franklin Resources Inc"
]

stockTickers["WORK"] = "Slack Technologies Inc"
stockTickers["BOOM"] = "DMC Global Inc"

print(stockTickers["WORK"]!)
print(stockTickers["BOOM"]!)

// I wanted to see how the full dictionary looks like
print(stockTickers)

func exercise() {

    var stockTickers: [String: String] = [
        "APPL" : "Apple Inc",
        "HOG": "Harley-Davidson Inc",
        "BOOM": "Dynamic Materials",
        "HEINY": "Heineken",
        "BEN": "Franklin Resources Inc",
    ]
    
    //Write your code here.
    stockTickers["WORK"] = "Slack Technologies Inc"
    stockTickers["BOOM"] = "DMC Global Inc"
    
     //Don't modify this
    print(stockTickers["WORK"]!)
    print(stockTickers["BOOM"]!)
}

exercise()

func exercise() {

//Don't change this
var stockTickers: [String: String] = [
    "APPL" : "Apple Inc", 
	"HOG": "Harley-Davidson Inc", 
	"BOOM": "Dynamic Materials", 
	"HEINY": "Heineken", 
	"BEN": "Franklin Resources Inc"
]

//Write your code here.

stockTickers["WORK"] = "Slack Technologies Inc"
stockTickers["BOOM"] = "DMC Global Inc"

 //Don't modify this
print(stockTickers["WORK"]!)
print(stockTickers["BOOM"]!)

}