Show: Delphi C++
Display Preferences

System.SetLength

From RAD Studio API Documentation
Jump to: navigation, search

Delphi

procedure SetLength(var S: <string or dynamic array>; NewLength: Integer);

Properties

Type Visibility Source Unit Parent
procedure public System.pas System System

Description

Sets the length of a string or dynamic array variable.

S is a Delphi string or dynamic array variable.

NewLength is the new number of characters or elements in S.

For a short string variable, SetLength simply sets the length-indicator character (the character at S[0]) to the given value. In this case, NewLength must be a value from 0 through 255.

For a long string variable, SetLength reallocates the string referenced by S to the given length. Existing characters in the string are preserved, but the content of newly allocated space is undefined.

For a dynamic array variable, SetLength reallocates the array referenced by S to the given length. Existing elements in the array are preserved and newly allocated space is set to 0 or nil. For multidimensional dynamic arrays, SetLength may take more than one-length parameter (up to the number of array dimensions). Each parameter specifies the number of elements along a particular dimension.

Following a call to SetLength, S is guaranteed to reference a unique string or array -- that is, a string or array with a reference count of one. If there is not enough memory available to reallocate the variable, SetLength raises an EOutOfMemory exception.

See Also

Code Examples

Personal tools
In Other Languages
Previous Versions
Assistance