Not finding item in list

[aumandg]

This is a continuation of this thread https://groups.google.com/forum/#!category-topic/mitappinventortest/general-questions-about-app-inventor-programming/mit-appinventor-2/Kb_rpiKm8QU

I know its been a while but I did not solve my problem.  I currently have these blocks below.  With these blocks I am testing to see if I can get the result that I need to up date an existing app that I have that is not working any longer do to the api call changing format after the app was created and working.  I need to be able to take what is listed in TextBox1 and find it in the list and then pull the price associated with it.

Example:  From the API call below  find BTC witch would be in the Textbox1 and pull just the price (4104.27619264) so I may use it to do a math problem.

My thought was that If I could find BTC in the list and then find its index and then use a look up in pairs to get the price, but I can not get any solution to work as what ever I try the blocks indicate that BTC is not in the list.  I have checked to see if the dataList is a list and I get "true" so I am very confused why its comes back and says that BTC is not in the list when I test this with the "is in list" block.

[TimAI2]

I ran your url:

https://api.coinmarketcap.com/v2/ticker/?convert=&limit=5

to get the json data, seems you are "mining" deep enough to get down to just one key?

BLOCKS

I could be missing something though...

[aumandg]

Hello TimAI2,

I am looking to pull the price of any item, it may not be ID1, might be 2 or 34.....

[TimAI2]

So in my example simply replace "1" with the ID you are after, in global Decode3, using a list generated from the json of all the IDs

[ABG]

I left you a general purpose tree search routine

containing_object

in the project JSON_Finder in post 

https://groups.google.com/d/msg/mitappinventortest/Kb_rpiKm8QU/mD7ARfw_CgAJ

If you pass it parameters "symbol" and "BTC" within the "data" tree,

it should return the subtree with id 1 (in this sample).

From there you have 3 hops into the tree using lookup in pairs:

quotes

USD

price

ABG

[TimAI2]

No doubt ABG's example is better, but reworked my first example to find the symbol from selected ID (as per the OP!), getting the price should then follow on from there

[ABG]

Here's a working sample, more powerful ...

https://docs.google.com/document/d/1Tat3hC0FpZKlWo00eMZqxxsl0-9umstjYpP5KbzftZM/edit?usp=sharing

Don't break apart the procedures, they are meant to be used whole.

See the Books section of the FAQ for how to use value procedures.

ABG

[ABG]

I just improved the app and doc to use List Pickers

instead of text boxes, for ease of use.

If you downloaded from the Gallery, delete the project and download it again

to get the new one.

revised Doc:

https://docs.google.com/document/d/1Tat3hC0FpZKlWo00eMZqxxsl0-9umstjYpP5KbzftZM/edit?usp=sharing

ABG

[aumandg]

Thank you ABG, I will take a look at this week and see if I can understand it.

[aumandg]

I believe I understand how it works, I will see If I can implement it into my app.

[aumandg]

As I test this API today there is a message at the top that says "it will shortly be depreciated" great now I get to look at different one, I guess it will keep me on my toes.