Optionals in Swift 3

Swift Optionals

A type the either has a "wrapped" value or is nil. e.g. let imagePaths = ["star": "/glyphs/star.png","portrait": "/images/content/portrait.jpg","spacer": "/images/shared/spacer.gif"] Getting a dictionary’s value using a key returns an optional value, so imagePaths["star"] has the type String? e.g. if let imagePath = imagePaths["star"] { print("The star image is at '(imagePath)'") } else { print("Couldn't find the image") } would print "The star image is at '/glyphs/star.png'" but "if let starPath = imagePaths[puppy]..... would print "Couldn't find the image" T

Convert numbers to and from strings in Swift

Convert numbers to and from strings in Swift // To convert a number to a string var costString = String(9.99) // To convert a string to an Int var wholeNumber = Int("27") // To convert a string to an Float let lessPrecisePI = Float("3.14") // To convert a string to an Double let morePrecisePI = Double("3.1415926536")

Simple script to backup all SQL Server databases

[draft] DECLARE @name VARCHAR(50) -- database name DECLARE @path VARCHAR(256) -- path for backup files DECLARE @fileName VARCHAR(256) -- filename for backup DECLARE @fileDate VARCHAR(20) -- used for file name SET @path = 'C:\Backup\' SELECT @fileDate = CONVERT(VARCHAR(20),GETDATE(),112) DECLARE db_cursor CURSOR FOR SELECT name FROM master.dbo.sysdatabases WHERE name NOT IN ('master','model','msdb','tempdb') OPEN db_cursor FETCH NEXT FROM db_cursor INTO @name WHILE @@FETCH_STATUS = 0 BEGIN SET @fileName = @path + @name + '_' + @fileDate + '.BAK' BACKUP DATABASE @name TO DISK = @fileName FETCH N

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