Implementing search result for searching inside dictionary? - swift

Question

I have a dictionary like,
var DataDict:[String:[String]] = [String:[String]]()
DataDict[“fruits”] = [“apple”,”orange”,”pineapple”,”grape”]
DataDict[“vehicle”] = [“car”,”cycle / scooter“,”bike”]
DataDict[“colours”] = [“black”,”white”,”yellow”,”green”,”blue”]
so when I search in the search bar, if the searchText is fruits then the tableview should display the full array of fruits, or else whatever the searchText matches to the single object inside each key of DataDict?
So how will I achieve that to display the tableview. I need to implement that in searchBar textDidChange delegate.
Finllay I need to the display the result as, DataDict object as title and It's respective key as Subtitle.
ex:
apple
fruits
pineapple
fruits

Answer 1

You can do like this,
var DataDict:[String:[String]] = [String:[String]]()
DataDict["fruits"] = ["apple","orange","pineapple","grape"]
DataDict["vehicle"] = ["car","cycle / scooter","bike"]
DataDict["colours"] = ["black","white","yellow","green","blue"]
let filterarray = Array(DataDict.keys).filter { $0.contains("searchText")}
print("\(filterarray)")
for string in filterarray {
print("\(DataDict[string]!)")
}
Now you can display the as your requirement with filterarray

Answer 2

try below method for searchingtext. Result can be displayed to table
func searchText(string:String) -> [String] {
let text = string
var DataDict:[String:[String]] = [String:[String]]()
DataDict["fruits"] = ["apple","orange","pineapple","grape"]
DataDict["vehicle"] = ["car","cycle / scooter","bike"]
DataDict["colours"] = ["black","white","yellow","green","blue"]
var searchedItems = [String]()
for key in DataDict.keys {
if text == key {
if let items = DataDict[key] {
searchedItems.removeAll()
searchedItems.append(contentsOf: items)
}
break;
}
else {
if let items = DataDict[key] {
let filterd = items.filter({ (x) -> Bool in
return x.lowercased().contains(text.lowercased())
})
if filterd.count > 0 {
searchedItems.append(contentsOf: filterd)
}
}
}
}
print("SearchedItems: \(searchedItems)")
return searchedItems
}

Answer 3

You may get array in this way also for faster response..
let arrTemp = Array(DataDict.keys).filter { $0.contains(searchBar.text!)}
print(DataDict[arrTemp[0]])
Hope it will work for you.. :)

Answer 4

I know its kind of late , but wanted to post an improved answer with the use of flatMap and filter.
var DataDict:[String:[String]] = [String:[String]]()
DataDict["fruits"] = ["apple","orange","pineapple","grape"]
DataDict["vehicle"] = ["car","cycle/scooter","bike"]
DataDict["colours"] = ["black","white","yellow","green","blue"]
let searchText = "orange"
func search() {
var resultsArray = [String]()
if DataDict[searchText] != nil {
resultsArray = DataDict[searchText] ?? []
}else {
resultsArray = DataDict.flatMap{$0.1}.filter{ $0 == searchText}
}
print(resultsArray)
}
With the use of flat map you do not need to iterate each array of string as it flattens your nested dict into one. For more info on flatMap https://medium.com/#abhimuralidharan/higher-order-functions-in-swift-filter-map-reduce-flatmap-1837646a63e8
Hope this helps.

Answer 5

Create Empty array and initialize it will first key of the DataDict and make it the dataSource of the tableView
then every search replace it's contents with the new one that matches the search and reload the tableView