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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| // Copyright © 2020 Flinesoft. All rights reserved. | ||
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| import Foundation | ||
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| extension Double { | ||
| /// Rounds the value to an integral value using the specified fraction digits and rounding rule. | ||
| /// | ||
| /// - NOTE: Dropping the `rule` parameter will default to “schoolbook rounding”. | ||
| public mutating func round(fractionDigits: Int, rule: FloatingPointRoundingRule = .toNearestOrAwayFromZero) { | ||
| let divisor = pow(10.0, Double(fractionDigits)) | ||
| self = (self * divisor).rounded(rule) / divisor | ||
| } | ||
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| /// Returns this value rounded to an integral value using the specified fraction digits and rounding rule. | ||
| /// | ||
| /// - NOTE: Dropping the `rule` parameter will default to “schoolbook rounding”. | ||
| public func rounded(fractionDigits: Int, rule: FloatingPointRoundingRule = .toNearestOrAwayFromZero) -> Double { | ||
| let divisor = pow(10.0, Double(fractionDigits)) | ||
| return (self * divisor).rounded(rule) / divisor | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| // Copyright © 2020 Flinesoft. All rights reserved. | ||
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| import Foundation | ||
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| extension StringProtocol { | ||
| /// Returns a variation with the first character uppercased. | ||
| public var firstUppercased: String { prefix(1).uppercased() + dropFirst() } | ||
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| /// Returns a variation with the first character capitalized. | ||
| public var firstCapitalized: String { prefix(1).capitalized + dropFirst() } | ||
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| /// Returns a variation with the first character lowercased. | ||
| public var firstLowercased: String { prefix(1).lowercased() + dropFirst() } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| // Copyright © 2020 Flinesoft. All rights reserved. | ||
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| @testable import HandySwift | ||
| import XCTest | ||
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| class DoubleExtTests: XCTestCase { | ||
| func testRound() { | ||
| var price: Double = 2.875 | ||
| price.round(fractionDigits: 2) | ||
| XCTAssertEqual(price, 2.88) | ||
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| price = 2.875 | ||
| price.round(fractionDigits: 2, rule: .down) | ||
| XCTAssertEqual(price, 2.87) | ||
| } | ||
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| func testRounded() { | ||
| let price: Double = 2.875 | ||
| XCTAssertEqual(price.rounded(fractionDigits: 2), 2.88) | ||
| XCTAssertEqual(price.rounded(fractionDigits: 2, rule: .down), 2.87) | ||
| } | ||
| } |
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