CODEWITHSUNDEEP
xcodeswift
swiftxcode
swiftxcode

Reputation: 13

Swift Xcode6 beta6 regex

I want to get the characters using regex

I want to get "CDE"

var results : NSMutableArray;
var baseString = "ABCDEFG"
var regexp  = NSRegularExpression(pattern: "AB.*?FG", options: nil, error: nil)
var match : NSArray = regexp.matchesInString(baseString, options: nil, range: NSMakeRange(0,countElements(baseString)));

for matches in match {      
    results.addObject(sampleString.substringWithRange(matches.rangeAtIndex(2)));
}
println(results);//print"CDE"

but I get error. ERROR→

results.addObject(sampleString.substringWithRange(matches.rangeAtIndex(2)));
NSRange' is not convertible to 'Range<String.Index>'

my english isn't good.sorry.. please help me...

Upvotes: 1

Views: 407

Answers (1)

zaph
zaph

Reputation: 112875

The regular expression is incorrect, the match will be the entire string. Instead use: (?<=AB).*?(?=FG).

Documantation: ICU User Guide Regular Expressions

Notes:

(?<=AB) means preceded by AB  
(?=FG)  means followed by FG

These do not capture the matched portion.

Example code:

var baseString = "ABCDEFG"
var pattern = "(?<=AB).*?(?=FG)"
if let range = baseString.rangeOfString(pattern, options: .RegularExpressionSearch) {
    let found = baseString.substringWithRange(range)
    println("found: \(found)")
}

Output:

found: CDE

Upvotes: 5

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