mORMot Open Source

anouri

Member

Registered: 2024-02-11

Posts: 85

IDocList get item by index?

Is there a option to get key and value with index of item?

DocList.Items[0].key
DocList.Items[0].Value

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,935

Website

Re: IDocList get item by index?

There is no key and value in a IDocList.

anouri

Member

Registered: 2024-02-11

Posts: 85

Re: IDocList get item by index?

I mean somthing like this:

for docdict in DocList do
   docdict .get_item_by_index(0);

get item value for docdict with index.

Last edited by anouri (2025-03-13 06:34:38)

tfopc

Member

Registered: 2024-01-08

Posts: 22

Re: IDocList get item by index?

Hi anouri,

jsonobjects has per definition as far as i know no real order. So direct access via an index is a little bit risky, if the creator will change his output/implementation.

You can use the DocDict.GetEnumerator to loop through the object elements.

I can also have a look at the implementation of the interator. But direct access is not possible without "pointer magic" i think.

anouri

Member

Registered: 2024-02-11

Posts: 85

Re: IDocList get item by index?

order is not matter. suppose json = {"a": 1,"b":2}

fdocdict := DocDict (json);

what is the problem with:

fdocdict[0].key
fdocdict[0].value

or somthing like that.
maybe conevrting docdict to varinat can help?

Last edited by anouri (2025-03-17 08:13:50)

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,935

Website

Re: IDocList get item by index?

The easiest is to use an enumerator for this.

var
  f: TDocDictFields;
...
  for f in DocDict do
  begin
    /// use f.Value / f.Key

anouri

Member

Registered: 2024-02-11

Posts: 85

Re: IDocList get item by index?

Excellent.Thank you