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Swift: finding array objects

I want to search in an array of objects in swift but I didn't know how :(

I tried

filteredArrayUsingPredicate

but still doesn't work, it gives me an error message

- Update -

error message

swift:42:9: 'Array<search_options>' does not have a member named 'filteredArrayUsingPredicate'

- Update -

class search_options {
        let id:String
        let option:String

        init(){}

        init(id:String ,option:String){
            self.id = id
            self.option = option
        }
    }

I only want to search in a parameter variable

And when I tried to use

func searchBarSearchButtonClicked( searchBar: UISearchBar!)
{
    let filteredArray = filter(search_options_array) { $0 == "test" }
    println(searchBar.text)
}

I received this message

swift:40:58: 'search_options' is not a subtype of 'String'
+3


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4 answers


Finally after a long search I did't! I was looking for a way to do dynamic search, for example if the String array contains

"hello","lo","yes"

and I want to get all lines containing like "lo" I want to get "hello" and "lo"

so the best way I found was regex search



so I am doing a For Loop by throwing all parameters into Array and comparing each object variable with the pattern and storing it in a new array on objects

    for var i = 0; i < search_options_array.count; i++ {
        let myRegex = "searched_text"
        if let match = search_options_array[i].option.rangeOfString(myRegex, options: .RegularExpressionSearch){
            filtered_options_array.append(search_options(id:search_options_array[i].id,option:search_options_array[i].option) )
        }
    }

The best part here is you can take full advantage of regex and have a copy of your old array, so if you need it.

Thanks everyone for the help.

+3


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Find the index of a specific object:

if let index = find(myArray, objectIAmLookingFor) {
    // found! do something
}


Filter:

let filteredArray = filter(myArray) { $0 == objectIAmLookingFor }
+11


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Since it filter

takes as a predicate a function that maps each element of a given value Array

to a value Bool

(to determine which value to filter out), in your case it might be like this:

let a = [
    search_options(id: "a", option: "X"),
    search_options(id: "b", option: "Y"),
    search_options(id: "c", option: "X")
]

let b = filter(a) { (e: search_options) in e.option == "X" }
// ==> [search_options(id: "a", option: "X"), search_options(id: "c", option: "X")]
+2


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Correct answer

func searchBarSearchButtonClicked( searchBar: UISearchBar!)
{
    let filteredArray = filter(search_options_array) { $0.option == "test" }
    println(searchBar.text)
}

or

func searchBarSearchButtonClicked( searchBar: UISearchBar!)
{
    let filteredArray = filter(search_options_array) { $0.id == "test" }
    println(searchBar.text)
}

You should get the property of the object you are searching with

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