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isExist in associate array
Dec 10, 2008
raymond
Dec 10, 2008
Ellery Newcomer
Dec 10, 2008
Spacen Jasset
December 10, 2008
Gravatar of raymondPosted by raymondReply
raymond
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how to check if array key exist in array or not? for example

	char[] [char[]] t;
	t["tes1"]="val1";
	t["tes2"]="val2";
	t["tes3"]="val3";

	if (t["test1"]) writefln("NONE");
December 10, 2008
Gravatar of Ellery NewcomerPosted by Ellery Newcomer
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Ellery Newcomer
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raymond wrote:
> how to check if array key exist in array or not? for example
> 
> 	char[] [char[]] t;
> 	t["tes1"]="val1";
> 	t["tes2"]="val2";
> 	t["tes3"]="val3";
> 
> 	if (t["test1"]) writefln("NONE");

if("test1" in t) writefln("exists");
December 10, 2008
Gravatar of Spacen JassetPosted by Spacen Jasset
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Spacen Jasset
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Ellery Newcomer wrote:
> raymond wrote:
>> how to check if array key exist in array or not? for example
>>
>>     char[] [char[]] t;
>>     t["tes1"]="val1";
>>     t["tes2"]="val2";
>>     t["tes3"]="val3";
>>
>>     if (t["test1"]) writefln("NONE");
> 
> if("test1" in t) writefln("exists");
Also useful:

char[] value;
if ( (value = "test1" in t) ) {
	writefln(value);
}
December 10, 2008
Gravatar of Jarrett BillingsleyPosted by Jarrett Billingsley
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Jarrett Billingsley
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On Wed, Dec 10, 2008 at 12:16 PM, Spacen Jasset <spacenjasset@yahoo.co.uk> wrote:
> Also useful:
>
> char[] value;
> if ( (value = "test1" in t) ) {
>        writefln(value);
> }
>

Almost; it's char[]* value, since in always returns a Value* type.
(and it would then be writefln(*value))

Aaalso useful:

if(auto value = "test1" in t)
    writefln(*value);