c# - Select lambda usage -


sorry perhaps noob question) trying learn new. have array holds object many fields - how check select if example first field of object equal string ? (this field string no type ops needed)

consider scenario:

// data object public class data {     public string name { get; set; }     public int value { get; set; }      public data(string name, int value)     {         this.name = name;         this.value = value;     } }  // array data[] array = new data[] {     new data("john smith", 123),     new data("jane smith", 456),     new data("jess smith", 789),     new data("josh smith", 012) }  array.any(o => o.name.contains("smith")); // returns true if object's name property contains "smith"; otherwise, false.  array.where(o => o.name.startswith("j")); // returns ienumerable<data> items in original collection name starts "j"  array.first(o => o.name.endswith("smith")); // returns first data item name ends "smith"  array.singleordefault(o => o.name == "john smith"); // returns single element name "john smith". // if number of elements name "john smith"  // greater 1, throw exception. // if no elements found, this` return null. // (singleordefault intended selecting unique elements).  array.select(o => new { fullname = o.name, age = o.value }); // projects data[] ienumerable<{fullname, value}>  // {fullname, value} anonymous type, name projects fullname , value projects age.

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