上图: 声明 var myString = new String(“Every good boy does fine.”); var myString = “Every good boy does fine.”; 字符串连接 var myString = “Every ” + “good boy ” + “does fine.”; var myString = “Every “; myString += “good boy does fine.”; 截取字符串 //截取第 6 位开始的字符 va…
http://techibee.com/powershell/check-if-a-string-is-null-or-empty-using-powershell/1889 Check if a string is NULL or EMPTY using PowerShellby TECHIBEE on OCTOBER 10, 2012 In this post, I will show you how to verify if a string is empty, null or havin…
Cocoa Dev Central Objective-C Objective-C is the primary language used to write Mac software. If you're comfortable with basic object-oriented concepts and the C language, Objective-C will make a lot of sense. If you don't know C, you should read the…