// SignedIntegerExtensions.swift - Copyright 2023 SwifterSwift
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//
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// SignedIntegerExtensions.swift
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// SwifterSwift
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//
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// Created by Omar Albeik on 8/15/17.
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// Copyright © 2017 SwifterSwift
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//
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#if canImport(Foundation)
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import Foundation
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#endif
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// MARK: - Properties
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public extension SignedInteger {
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/// SwifterSwift: Absolute value of integer number.
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var abs: Self {
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return Swift.abs(self)
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}
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/// SwifterSwift: Check if integer is positive.
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var isPositive: Bool {
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return self > 0
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}
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/// SwifterSwift: Check if integer is negative.
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var isNegative: Bool {
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return self < 0
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}
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/// SwifterSwift: Check if integer is even.
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var isEven: Bool {
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return (self % 2) == 0
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}
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/// SwifterSwift: Check if integer is odd.
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var isOdd: Bool {
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return (self % 2) != 0
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}
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/// SwifterSwift: String of format (XXh XXm) from seconds Int.
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var timeString: String {
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guard self > 0 else {
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return "0 sec"
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}
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if self < 60 {
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return "\(self) sec"
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}
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if self < 3600 {
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return "\(self / 60) min"
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}
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let hours = self / 3600
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let mins = (self % 3600) / 60
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if hours != 0, mins == 0 {
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return "\(hours)h"
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}
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return "\(hours)h \(mins)m"
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}
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}
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// MARK: - Methods
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public extension SignedInteger {
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/// SwifterSwift: Greatest common divisor of integer value and n.
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///
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/// - Parameter number: integer value to find gcd with.
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/// - Returns: greatest common divisor of self and n.
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func gcd(of number: Self) -> Self {
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return number == 0 ? self : number.gcd(of: self % number)
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}
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/// SwifterSwift: Least common multiple of integer and n.
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///
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/// - Parameter number: integer value to find lcm with.
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/// - Returns: least common multiple of self and n.
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func lcm(of number: Self) -> Self {
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return (self * number).abs / gcd(of: number)
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}
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#if canImport(Foundation)
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/// SwifterSwift: Ordinal representation of an integer.
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///
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/// print((12).ordinalString()) // prints "12th"
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///
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/// - Parameter locale: locale, default is .current.
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/// - Returns: string ordinal representation of number in specified locale language. E.g. input 92, output in "en":
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/// "92nd".
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func ordinalString(locale: Locale = .current) -> String? {
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let formatter = NumberFormatter()
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formatter.locale = locale
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formatter.numberStyle = .ordinal
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guard let number = self as? NSNumber else { return nil }
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return formatter.string(from: number)
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}
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#endif
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}
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