diff options
Diffstat (limited to 'csharp.html.markdown')
| -rw-r--r-- | csharp.html.markdown | 34 |
1 files changed, 23 insertions, 11 deletions
diff --git a/csharp.html.markdown b/csharp.html.markdown index dad0c26b..4fa8deba 100644 --- a/csharp.html.markdown +++ b/csharp.html.markdown @@ -30,6 +30,7 @@ using System.Linq; using System.Linq.Expressions; using System.Net; using System.Threading.Tasks; +using System.IO; // defines scope to organize code into "packages" namespace Learning @@ -105,7 +106,7 @@ namespace Learning Console.WriteLine(fooString); // You can access each character of the string with an indexer: - char charFromString = fooString[1]; // 'y' + char charFromString = fooString[1]; // => 'e' // Strings are immutable: you can't do fooString[1] = 'X'; // Compare strings with current culture, ignoring case @@ -173,7 +174,7 @@ on a new line! ""Wow!"", the masses cried"; int i1 = 1, i2 = 2; // Shorthand for multiple declarations // Arithmetic is straightforward - Console.WriteLine(i1 + i2 - i1 * 3 / 7); // + Console.WriteLine(i1 + i2 - i1 * 3 / 7); // => 3 // Modulo Console.WriteLine("11%3 = " + (11 % 3)); // => 2 @@ -241,7 +242,7 @@ on a new line! ""Wow!"", the masses cried"; int fooDoWhile = 0; do { - //Iterated 99 times, fooDoWhile 0->99 + //Iterated 100 times, fooDoWhile 0->99 fooDoWhile++; } while (fooDoWhile < 100); @@ -306,7 +307,7 @@ on a new line! ""Wow!"", the masses cried"; // try parse will default to type default on failure // in this case: 0 int tryInt; - if (int.TryParse("123", out tryInt)) // Funciton is boolean + if (int.TryParse("123", out tryInt)) // Function is boolean Console.WriteLine(tryInt); // 123 // Convert Integer To String @@ -434,6 +435,17 @@ on a new line! ""Wow!"", the masses cried"; Func<int, int> square = (x) => x * x; // Last T item is the return value Console.WriteLine(square(3)); // 9 + // DISPOSABLE RESOURCES MANAGEMENT - let you handle unmanaged resources easily. + // Most of objects that access unmanaged resources (file handle, device contexts, etc.) + // implement the IDisposable interface. The using statement takes care of + // cleaning those IDisposable objects for you. + using (StreamWriter writer = new StreamWriter("log.txt")) + { + writer.WriteLine("Nothing suspicious here"); + // At the end of scope, resources will be released. + // Even if an exception is thrown. + } + // PARALLEL FRAMEWORK // http://blogs.msdn.com/b/csharpfaq/archive/2010/06/01/parallel-programming-in-net-framework-4-getting-started.aspx var websites = new string[] { @@ -499,11 +511,11 @@ on a new line! ""Wow!"", the masses cried"; var db = new BikeRespository(); // execution is delayed, which is great when querying a database - var fitler = db.Bikes.Where(b => b.HasTassles); // no query run + var filter = db.Bikes.Where(b => b.HasTassles); // no query run if (42 > 6) // You can keep adding filters, even conditionally - great for "advanced search" functionality - fitler = fitler.Where(b => b.IsBroken); // no query run + filter = filter.Where(b => b.IsBroken); // no query run - var query = fitler + var query = filter .OrderBy(b => b.Wheels) .ThenBy(b => b.Name) .Select(b => b.Name); // still no query run @@ -546,7 +558,7 @@ on a new line! ""Wow!"", the masses cried"; } set // set - define a method to set a proprety { - _cadence = value; // Value is the value passed in to to the setter + _cadence = value; // Value is the value passed in to the setter } } private int _cadence; @@ -564,7 +576,7 @@ on a new line! ""Wow!"", the masses cried"; } int _speed; // Everything is private by default: Only accessible from within this class. - // can also use keyword privatee + // can also use keyword private public string Name { get; set; } // Enum is a value type that consists of a set of named constants @@ -576,7 +588,7 @@ on a new line! ""Wow!"", the masses cried"; AIST, BMC, Electra = 42, //you can explicitly set a value to a name - Gitane + Gitane // 43 } // We defined this type inside a Bicycle class, so it is a nested type // Code outside of this class should reference this type as Bicycle.Brand @@ -596,7 +608,7 @@ on a new line! ""Wow!"", the masses cried"; // This is a default constructor public Bicycle() { - this.Gear = 1; // you can access mmebers of the object with the keyword this + this.Gear = 1; // you can access members of the object with the keyword this Cadence = 50; // but you don't always need it _speed = 5; Name = "Bontrager"; |