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Rushmore Design Flaw Heads-UP!
Message
De
11/07/1999 00:30:08
 
 
À
09/07/1999 14:57:49
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00238826
Message ID:
00239917
Vues:
26
Jim,

>>I explained my opinion ti tis fullest in the post you are referring to, and I won't beat the horse now, but I will simply restate: If you are getting an error with VARTYPE, then you are using it for something it was not designed for.

>Yep, it's just that we are not told what it is (or isn't designed for.


Hello! Maybe I've missed something but the help file _does_ tell us what the VARTYPE() funtion is for.

The VFP helpfile says:

"Returns the data type of an expression." <<--- !!!! Here it is. Followed by:

"Syntax

VARTYPE(eExpression [, lNullDataType])

Returns

Character

Arguments

eExpression

Specifies the expression for which the data type is returned. VARTYPE( ) returns a single character indicating the data type of the expression. The following table lists the characters that VARTYPE( ) returns for each data type:

Character returned Data type
C Character or Memo
N Numeric, Integer, Float, or Double
Y Currency
L Logical
O Object
G General
D Date
T DateTime
X Null
U Unknown


Note If eExpression is an array, the first element in the array is evaluated.

lNullDataType

Specifies if VARTYPE( ) returns the data type when eExpression contains the null value. If lNullDataType is true (.T.), VARTYPE( ) returns the data type of eExpression. If lNullDataType is false (.F.) or omitted, VARTYPE( ) returns 'X', indicating that eExpression contains the null value.

Remarks

VARTYPE( ) is similar to the TYPE( ) function, but VARTYPE( ) is faster and does not require quotation marks to enclose the expression for which the data type is returned.

VARTYPE( ) returns “U” if you specify a variable that doesn’t exist."

Best,
Best,


DD

A man is no fool who gives up that which he cannot keep for that which he cannot lose.
Everything I don't understand must be easy!
The difficulty of any task is measured by the capacity of the agent performing the work.
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