How about A[0] = 0; ?
> [EMAIL PROTECTED] <mailto:owner-delphi@;delphi.org.nz>
> wrote on
>
> Nope, That is the most efficient form ie (A = ''). The compiler does
> a nice job of optimising it - basically a single instruction -
> ignoring the jmp
>
> eg
> cmp dword ptr [es],$00
> jnz ...
>
> Compare this to Length(A)
>
> Move eax, ecx
> Call @LStrLen
> test eax,eax
> jnz ...
>
> And LStrLen is
> tst eax,eax
> jz $03
> mov eax,[eax-4]
> ret
>
> Myles.
>
>
>
>
>
> -----Original Message-----
> From: vss [mailto:vss@;vss.co.nz]
> Sent: Thursday, 31 October 2002 4:04 p.m.
> To: Multiple recipients of list delphi
> Subject: Re: [DUG]: Empty string test
>
>
> I second that. if legnth(mystring)=0 then showmessage('its empty')
>
> Jeremy
>
> -----Original Message-----
> From: "Jeremy North" <[EMAIL PROTECTED]>
> To: Multiple recipients of list delphi <[EMAIL PROTECTED]>
> Date: Thu, 31 Oct 2002 14:00:41 +1100
> Subject: Re: [DUG]: Empty string test
>
>>
>> I was once told that checking the length was.
>> The person that told me said that it was recommend by boundschecker
>> application. JED
>>
>>> Whats the fastest way to test for an empty string
>>> I just get the feeling that String = '' is not good practice
>>
>>
>>
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