How to convert a string that looks like an array's values to an array?

Question

I've a string that looks like an array that shown below. How can I transform this string to an array like shown below? I've tried this solution but I got an error from Xcode(Command failed due to signal segmentation fault 11) and I've thought this way too hard for compiler.

String:

var list = "<strong>UP</strong>, <strong>UP</strong>, <strong>DOWN</strong>, <strong>UP</strong>"

Target Array:

var array = [<strong>UP</strong>, <strong>UP</strong>, <strong>DOWN</strong>, <strong>UP</strong>]

And when I tried let arr = list.characters.split {$0 == ","} prints:

[Swift.String.CharacterView(_core: Swift._StringCore(_baseAddress: 0x0000000103152e40, _countAndFlags: 9223372036854775811, _owner: nil)), Swift.String.CharacterView(_core: Swift._StringCore(_baseAddress: 0x0000000103152e48, _countAndFlags: 9223372036854775812, _owner: nil)), Swift.String.CharacterView(_core: Swift._StringCore(_baseAddress: 0x0000000103152e52, _countAndFlags: 9223372036854775817, _owner: nil)), Swift.String.CharacterView(_core: Swift._StringCore(_baseAddress: 0x0000000103152e66, _countAndFlags: 9223372036854775816, _owner: nil)), Swift.String.CharacterView(_core: Swift._StringCore(_baseAddress: 0x0000000103152e78, _countAndFlags: 9223372036854775815, _owner: nil))]

With whitespace(let arr = list.characters.split {$0 == ", "}) gives compiler error:

Command failed due to signal segmentation fault 11

Use the native `split` function: http://stackoverflow.com/questions/25678373/swift-split-a-string-into-an-array — SalientGreen, Sep 25 '15 at 20:38
This does not work? `let arr = list.characters.split {$0 == ","}` — Niki van Stein, Sep 25 '15 at 20:40
I've tried let arr = list.characters.split {$0 == ", "} edited... — do it better, Sep 25 '15 at 20:44
Xcode gives error `... use split() function instead` @SalientGreen — do it better, Sep 25 '15 at 20:50

score 1 · Answer 1 · answered Sep 25 '15 at 21:07

1

There is a function that does that, componentsSeparatedByString

var array = list.componentsSeparatedByString(", ")

answered Sep 25 '15 at 21:07

Lukas

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TheRobDay · Accepted Answer · 2015-09-25T21:07:27.397

Would this work:

var list = "<strong>UP</strong>, <strong>UP</strong>, <strong>DOWN</strong>, <strong>UP</strong>"

do {
    //Create a reggae and replace "," with any following spaces with just a comma
    let regex = try NSRegularExpression(pattern: ", +", options: NSRegularExpressionOptions.CaseInsensitive)
    list = regex.stringByReplacingMatchesInString(list, options: NSMatchingOptions.WithoutAnchoringBounds, range: NSMakeRange(0, list.characters.count), withTemplate: ",")
    var array = list.characters.split { $0 == ","}.map(String.init)
} catch {
    //Bad regex created
}

EDIT: Updated the example to remove componentsSeparatedByString for a native swift way. The problem with your example is that the resulting array did not contain strings but what seems to be an internal class called CharacterView. Mapping these back into Strings produces the desired output.

Output:

[
    "<strong>UP</strong>", 
    "<strong>UP</strong>", 
    "<strong>DOWN</strong>", 
    "<strong>UP</strong>"
]

A bit unnecessary since swift has a native function called `split` — SalientGreen, Sep 25 '15 at 21:01

How to convert a string that looks like an array's values to an array?

2 Answers2