procedure DoSomething(A: array of const); 这里声明了一个叫做DoSomething的过程,该过程可以操作不同种类的数组。 array of const结构等价于array of TVarRec。TVarRec,在单元System中声明,用于表示一个记录,记录中有一个可以保存多种值(整数、布尔、字符、实数、串、指针、类、类引用、接口、变体等)的变体部分。
function Fun1(arr: array of const): string; var i: Integer; begin Result :=''; fori := Low(arr) to High(arr) do begin case arr[i].VType of vtInteger : Result := Result + IntToStr(arr[i].VInteger) +' '; vtBoolean : Result := Result + BoolToStr(arr[i].VBoolean,True) ...
functionFun3(constarr:arrayofconst):string;vari: Integer;constn = sLineBreak;beginResult :='';fori := Low(arr)toHigh(arr)dowitharr[i]dobegincaseVTypeof0: Result := Result +'Integer'+ n;1: Result := Result +'Boolean'+ n;2: Result := Result +'Char'+ n;3: Result := Result...
type TByteArr = array of Byte; Function to convert Byte Arrays to Hex Strings To visualize byte arrays of this type into a string, we use the following function. The function goes through the byte array passed as the first parameter byte by byte and converts each individual byte value to...
The number of strings contained within the object's internal array (i.e. ordered collection). Important: This is an object that contains a collection of strings. Although the class/object name includes the word "Array", it should not be confused with an array in the sense of the ...
cRec:arrayofTVarRec; cText:Variant; i:Integer;begincList:=TStringList.Create; cList.Add('01001'); cList.Add('原材料'); SetLength(cRec,cList.Count);forI :=0tocList.Count-1dobegincText:=cList.Strings[i]; cRec[i+1].VVariant:=Addr(cText);end;//FDQuery1.AppendRecord(cRec);end; ...
C#: How to read values in Excel Cells as strings? C#: How to retrieve data value of Cell of dataGridView and displayit in the button? [MODIFIED QUESTION LAYOUT] C#: Input stream is not readable since its canread returns false C#: Is it possible to create an array of dictionaries? If ...
答:在Delphi中使用的编程语言是基于Pascal的面向对象语言,但是在功能上更为强大。所用的语法与Pascal一样,对于赋值语句aa:= ″1234″;不能省掉等号前的冒号,这是Pascal赋值语句所必须的,并且语句最后的分号也必不可少,它代表一个语句的结束。另外,在使用变量前必须先对其声明(定义变量),否则无法使用。下面是一个...
getSubItems(listitem): Returns a Strings object delete() getCaption() : Returns the first columns string of the listitem setCaption(string) : Sets the first column string of the listitem getChecked() : Returns true if the listitem is checked setChecked(boolean): Sets the checkbox of the li...
var Students : array of string; creates a one-dimensional dynamic array of strings. The declaration does not allocate memory for Students. To create the array in memory, we call SetLength procedure. For example, given the declaration above, ...