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import SwiftUI | |
private class IntegerTextFieldValue: ObservableObject { | |
@Published var value = "" { | |
didSet { | |
let numbersOnly = value.filter { $0.isNumber } | |
if value != numbersOnly { | |
value = numbersOnly | |
} | |
} |
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;; | |
;; NS CHEATSHEET | |
;; | |
;; * :require makes functions available with a namespace prefix | |
;; and optionally can refer functions to the current ns. | |
;; | |
;; * :import refers Java classes to the current namespace. | |
;; | |
;; * :refer-clojure affects availability of built-in (clojure.core) | |
;; functions. |