Substringing in swift feels so complicated
I want to get
abc
from
word(abc)
What is the easiest way of doing this?
And how can i fix the below code to work?
let str = "word(abc)"
// get index of (
let start = str.rangeOfString("(")
// get index of )
let end = str.rangeOfString(")")
// substring between ( and )
let substring = str[advance(str.startIndex, start!.startIndex), advance(str.startIndex, end!.startIndex)]
Xcode 8.2 • Swift 3.0.2
let text = "word(abc)"
// substring between ( and )
if let start = text.range(of: "("),
let end = text.range(of: ")", range: start.upperBound..<text.endIndex) {
let substring = text[start.upperBound..<end.lowerBound] // "abc"
} else {
print("invalid input")
}
text = "foo)bar(" .You can use stringByReplacingOccurrencesOfString:
var a = "word(abc)" // "word(abc)"
a = a.stringByReplacingOccurrencesOfString("word(", withString: "") // "abc)"
a = a.stringByReplacingOccurrencesOfString(")", withString: "") // "abc"
or the loop solution:
var a = "word(abc)"
for component in ["word(", ")"] {
a = a.stringByReplacingOccurrencesOfString(component, withString: "")
}
For more complex stuff though, a regex would be neater.
Using regular expression.
let str = "ds)) ) ) (kj( (djsldksld (abc)"
var range: Range = str.rangeOfString("\\([a-zA-Z]*\\)", options:.RegularExpressionSearch)!
let subStr = str.substringWithRange(range).stringByReplacingOccurrencesOfString("\\(", withString: "", options: .RegularExpressionSearch).stringByReplacingOccurrencesOfString("\\)", withString: "", options: .RegularExpressionSearch)
println("subStr = \(subStr)")
