Array of record initialization
I have this type:
type
TFieldRec = array of record
FieldName: string;
Value: Variant;
DataType: TFieldType;
Data: Pointer;
end;
And the code:
var
FR: TFieldRec;
SetLength(FR, 5);
My question: is it guaranteed that each record element will be initialize with default values?
'', Unassigned, ftUnknown, nil
In the debugger I can see it is true. But I remember records should be initialized with Initialize (or is it Finalize?)
delphi
asked Nov 26 '18 at 10:35
zigzig
1,893732
add a comment |
I have this type:
type
TFieldRec = array of record
FieldName: string;
Value: Variant;
DataType: TFieldType;
Data: Pointer;
end;
And the code:
var
FR: TFieldRec;
SetLength(FR, 5);
My question: is it guaranteed that each record element will be initialize with default values?
'', Unassigned, ftUnknown, nil
In the debugger I can see it is true. But I remember records should be initialized with Initialize (or is it Finalize?)
delphi
asked Nov 26 '18 at 10:35
zigzig
1,893732
True. Will delete
– Dsm
Nov 26 '18 at 11:24
add a comment |
I have this type:
type
TFieldRec = array of record
FieldName: string;
Value: Variant;
DataType: TFieldType;
Data: Pointer;
end;
And the code:
var
FR: TFieldRec;
SetLength(FR, 5);
My question: is it guaranteed that each record element will be initialize with default values?
'', Unassigned, ftUnknown, nil
In the debugger I can see it is true. But I remember records should be initialized with Initialize (or is it Finalize?)
delphi
asked Nov 26 '18 at 10:35
zigzig
1,893732
I have this type:
type
TFieldRec = array of record
FieldName: string;
Value: Variant;
DataType: TFieldType;
Data: Pointer;
end;
And the code:
var
FR: TFieldRec;
SetLength(FR, 5);
My question: is it guaranteed that each record element will be initialize with default values?
'', Unassigned, ftUnknown, nil
In the debugger I can see it is true. But I remember records should be initialized with Initialize (or is it Finalize?)
delphi
delphi
asked Nov 26 '18 at 10:35
zigzig
1,893732
asked Nov 26 '18 at 10:35
zigzig
1,893732
edited Nov 26 '18 at 12:05
zig
asked Nov 26 '18 at 10:35
zigzig
1,893732
asked Nov 26 '18 at 10:35
zigzig
1,893732
asked Nov 26 '18 at 10:35
zigzig
1,893732
1,893732
True. Will delete
– Dsm
Nov 26 '18 at 11:24
add a comment |
True. Will delete
– Dsm
Nov 26 '18 at 11:24
True. Will delete
– Dsm
Nov 26 '18 at 11:24
True. Will delete
– Dsm
Nov 26 '18 at 11:24
add a comment |
1 Answer
1
active
oldest
votes
My question: is it guaranteed that each record element will be initialized with default values?
Yes, this is guaranteed.
The SetLength documentation says (my emphasis):
Existing elements in the array are preserved and newly allocated space is set to 0 or nil.
edited Nov 27 '18 at 10:33
Kromster
4,77064987
answered Nov 26 '18 at 10:41
David HeffernanDavid Heffernan
522k348361226
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
My question: is it guaranteed that each record element will be initialized with default values?
Yes, this is guaranteed.
The SetLength documentation says (my emphasis):
Existing elements in the array are preserved and newly allocated space is set to 0 or nil.
edited Nov 27 '18 at 10:33
Kromster
4,77064987
answered Nov 26 '18 at 10:41
David HeffernanDavid Heffernan
522k348361226
add a comment |
My question: is it guaranteed that each record element will be initialized with default values?
Yes, this is guaranteed.
The SetLength documentation says (my emphasis):
Existing elements in the array are preserved and newly allocated space is set to 0 or nil.
edited Nov 27 '18 at 10:33
Kromster
4,77064987
answered Nov 26 '18 at 10:41
David HeffernanDavid Heffernan
522k348361226
add a comment |
My question: is it guaranteed that each record element will be initialized with default values?
Yes, this is guaranteed.
The SetLength documentation says (my emphasis):
Existing elements in the array are preserved and newly allocated space is set to 0 or nil.
edited Nov 27 '18 at 10:33
Kromster
4,77064987
answered Nov 26 '18 at 10:41
David HeffernanDavid Heffernan
522k348361226
My question: is it guaranteed that each record element will be initialized with default values?
Yes, this is guaranteed.
The SetLength documentation says (my emphasis):
Existing elements in the array are preserved and newly allocated space is set to 0 or nil.
edited Nov 27 '18 at 10:33
Kromster
4,77064987
answered Nov 26 '18 at 10:41
David HeffernanDavid Heffernan
522k348361226
edited Nov 27 '18 at 10:33
Kromster
4,77064987
edited Nov 27 '18 at 10:33
Kromster
4,77064987
edited Nov 27 '18 at 10:33
Kromster
4,77064987
4,77064987
answered Nov 26 '18 at 10:41
David HeffernanDavid Heffernan
522k348361226
answered Nov 26 '18 at 10:41
David HeffernanDavid Heffernan
522k348361226
answered Nov 26 '18 at 10:41
David HeffernanDavid Heffernan
522k348361226
522k348361226
add a comment |
add a comment |
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True. Will delete
– Dsm
Nov 26 '18 at 11:24