在 Swift 的二维数组中搜索和替换字符串

Question

Teaching myself swift, so complete noob here, but I'm far into a project and just know there must be an easier way to achieve something.

I have a 2D array:

var shopArray = [
["theme":"default","price":0,"owned":true,"active":true,"image":UIImage(named: "defaultImage")!,"title":"BUY NOW"],
["theme":"red","price":1000,"owned":false,"active":false,"image":UIImage(named: "redImage")!,"title":"BUY NOW"],
["theme":"blue","price":2000,"owned":false,"active":false,"image":UIImage(named: "blueImage")!,"title":"BUY NOW"],
["theme":"pool","price":3000,"owned":true,"active":false,"image":UIImage(named: "blueImage")!,"title":"BUY NOW"],
["theme":"line","price":4000,"owned":false,"active":false,"image":UIImage(named: "lineImage")!,"title":"BUY NOW"],
["theme":"neon","price":5000,"owned":false,"active":false,"image":UIImage(named: "lineImage")!,"title":"BUY NOW"]]

Where I simply want to create a function that runs and search for all the "owned" keys and make them all "false" .

How do you search and replace in Arrays / 2D Arrays. More specifiaclly, what should the func look like?

Thank you!

Answer 1

You don't have a 2D array, you have an Array of Dictionaries.

You can set all of the values for the owned keys by iterating the indices of the Array and updating the values:

shopArray.indices.forEach { shopArray[$0]["owned"] = false }

That is the functional way to do it. You could also do the same operation with a for loop:

for idx in shopArray.indices {
    shopArray[idx]["owned"] = false
}

Answer 2

You could do something like this to loopthrough the array replacing the approriate element.

var i = 0
for x in shopArray {
    var y = x
    y["owned"] = false
    shopArray.remove(at: i)
    shopArray.insert(y, at: i)
    i = i + 1
}

or you could use a while loop to do the same with less code lines.

var y = 0
while y < shopArray.count {
    shopArray[y].updateValue(false, forKey: "owned")
    y += 1
}

There is proably somthing doable with.contains, but I'm not sure you need that toachive the result you mention above. Play around in a play ground in xcode and try a few different options without doing anything that might cause issues in your project.