import Foundation
func includeDollarSymbolText(_ input: String) -> Bool {
// Define regex to match $word$, case-insensitive
let pattern = "\\$[a-z]+\\$"
let regex = try! NSRegularExpression(pattern: pattern, options: .caseInsensitive)
// Remove matches from the input
let range = NSRange(input.startIndex..., in: input)
let cleanedText = regex.stringByReplacingMatches(in: input, options: [], range: range, withTemplate: "")
// Check for any remaining dollar symbols
return !cleanedText.contains("$")
}
print(includeDollarSymbolText("abc xy $text$ z")) // ok
print(includeDollarSymbolText("abc xy $ text$ z")) // space
print(includeDollarSymbolText("abc xy $$ z")) // empty
print(includeDollarSymbolText("abc 100 $text$ z")) // ok
print(includeDollarSymbolText("abc $1000 $text$ z")) // open $
print(includeDollarSymbolText("abc xy $IBM$ z $Microsoft$")) // ok
print(includeDollarSymbolText("abc xy $F3$ z")) // include number
print(includeDollarSymbolText("abc xy $text z")) // missing close $
/*
run:
true
false
false
true
false
true
false
false
*/
