Tweak on DateFormatters

Author: dehesa

IG/IG.xcodeproj/project.pbxproj

@@ -797,6 +797,7 @@
 			children = (
 				8DC4CA492149A6CE00344CBF /* Date.swift */,
 				8D9FB786231F943C00D76B6A /* DateFormatter.swift */,
+				8D88F5F8246C79D900743B2B /* UTC.swift */,
 				8D911F6422ECF4CA0038E899 /* Decimal.swift */,
 				8D3C262422E9FA020080D3C1 /* Collections.swift */,
 				8D569217245FE63D00E9E621 /* c */,
@@ -806,7 +807,6 @@
 				8DF85B1B22F046FA00F1C525 /* Error.swift */,
 				8D19C51A2326459000F029B3 /* ErrorHelper.swift */,
 				8D30D082232566D900D83E0A /* ErrorCodable.swift */,
-				8D88F5F8246C79D900743B2B /* UTC.swift */,
 			);
 			path = utils;
 			sourceTree = "<group>";

IG/sources/utils/Decimal.swift

@@ -67,7 +67,7 @@ extension Decimal {
     ///
     /// The operation is: `Decimal(value) / (10^power)`
     /// - precondition: `power` must be zero or a positive number.
-    internal init<I>(_ value: I, divingByPowerOf10 power: Int) where I:BinaryInteger {
+    @inlinable internal init<I>(_ value: I, divingByPowerOf10 power: Int) where I:BinaryInteger {
         precondition(power > 0)
         let lhs: Decimal = Decimal(exactly: value)!
         let rhs: Decimal = pow(10 as Decimal, power)

IG/sources/utils/UTC.swift

@@ -13,7 +13,7 @@ public enum UTC {
 }
 
 extension UTC {
-    /// Date and time using the UTC calendar and timezone as `DateFormatter` base.
+    /// Date and time using the UTC calendar and timezone.
     /// - Example: `2019-09-09 11:43:09`
     internal final class Timestamp {
         private var _components = DateComponents()
@@ -54,17 +54,34 @@ extension UTC {
 
             var result = String()
             result.reserveCapacity(19)
+            
             result.append(String(components.year!))
             result.append("-")
-            result.append(String(components.month!))
+            
+            let month = components.month!
+            if month < 10 { result.append("0") }
+            result.append(String(month))
             result.append("-")
-            result.append(String(components.day!))
+            
+            let day = components.day!
+            if day < 10 { result.append("0") }
+            result.append(String(day))
             result.append(" ")
-            result.append(String(components.hour!))
+            
+            let hour = components.hour!
+            if hour < 10 { result.append("0") }
+            result.append(String(hour))
             result.append(":")
-            result.append(String(components.minute!))
+            
+            let minute = components.minute!
+            if minute < 10 { result.append("0") }
+            result.append(String(minute))
             result.append(":")
-            result.append(String(components.second!))
+            
+            let second = components.second!
+            if second < 10 { result.append("0") }
+            result.append(String(second))
+            
             return result
         }
     }