Array转换为List List转换为Array Array转Dictionary Dictionary转Array List转Dictionary Dictionary转List IQueryable,IEnumerable,List相互转换 基本资料, 定义Student类,并添加属性 class Student { public int Id { get; set; } public string Name { get; set; } public string Gender { get
PChar,PAnsiChar,String,AnsiString,Char数组,AnsiChar数组之间的转换关系见下图 通过转换链,可以实现任意两个类型之间的互转.如PChar转PAnsiChar,根据转换链可知 Dest := PAnsiChar(AnsiString(Source)),同理PAnsiChar转PChar为 Dest:= PChar(String(Source)) 如果转换结果最终为string,可以无需String转换,如Array[0..n] of AnsiChar转s
先贴一段C++标准(ISO/IEC 14882:2003): 5.2.1 Subscripting: 1 A postfix expression followed by an expression in square brackets is a postfix expression. One of theexpressions shall have the type “pointer to T” and the other shall have enumeration or integral
使用yield和函数式编程转换数组 //对Array进行转换,获取的还是Aarry val a = Array(1,2,3,4,5) val a2 = for(ele <- a) yield ele * ele //对ArrayBuffer进行转换,获取的还是ArrayBuffer val b = ArrayBuffer[Int]() b+=(1,2,3,4,5) val b2=for(ele <- b) yield ele*ele //结合if守卫, 仅转换需要元素 val a3= for(