How to do JSON parsing and subsequent type annotation within a nested array #4288
-
|
Happy Christmas 🎄, dear community! I am stuck getting specific fields within JSON data, as I cannot figure out how to access the contents of key-value pairs within a nested array. I would to access the data within Any kind of help would be most welcome. Many thanks in advance! Here is the JSON data : (liquidsoap code below JSON data) Here is my current liquidsoap code that parses that JSON data - and quits with a parse error: ---------------------End of Original Post---------- |
Beta Was this translation helpful? Give feedback.
Replies: 2 comments 13 replies
-
|
Hi @mojikosu, let json.parse (j:{
track: {
sections: [
{
tabname: string,
type: string,
metadata: [{
text: string,
title: string
}]?,
metapages: [{
caption: string,
image: string
}]?,
url: string?
}
]
}
})The alternative is |
Beta Was this translation helpful? Give feedback.
-
|
@vitoyucepi Hi there and thank you for your input! Happy Boxing Day. 🎅 See the updated .liq file below: |
Beta Was this translation helpful? Give feedback.
-
|
Your list.map() code snippet works (of course ;) ) , but only if I write down the metadata_list manually into the .liq file and iterate over it. If I use the metadata_list generated by the previous liquidsoap code, it throws the following error: Am I / we running into a limitation of the parsing capabilities, or am I still messing up things? From what I understand, it looks to me as if
knowing that metadata_list is generated from first_section, where |
Beta Was this translation helpful? Give feedback.
-
|
Can you show the whole function? The data is available in the first message. |
Beta Was this translation helpful? Give feedback.
-
|
Here you go :) |
Beta Was this translation helpful? Give feedback.
-
|
I'd like to replace # Find the first section with non-null metadata, using the `default` argument
let first_section = list.hd(
default={
metadata = [],
tabname = "",
type = "",
url = null
},
sections
)
let metadata_list =
if first_section.metadata != null() then
first_section.metadata
else
[]
end
#mdata = list.map(fun(x) -> (x.title, x.text), metadata_list)with metadata_list =
try
metadata_section = list.find(fun(section) -> section.metadata != null(), sections)
list.map(
fun(metadata_item) -> (metadata_item.title, metadata_item.text),
null.get(metadata_section.metadata)
)
catch err do
[]
end
print(metadata_list) |
Beta Was this translation helpful? Give feedback.
-
|
The contents of metadata_list changed indeed to this: |
Beta Was this translation helpful? Give feedback.
-
|
Based on your last suggestion and with this code: I get: It is done! 👯 🥳 🍾 |
Beta Was this translation helpful? Give feedback.
-
|
The |
Beta Was this translation helpful? Give feedback.
-
|
Suggestion implemented :) |
Beta Was this translation helpful? Give feedback.
I'd like to replace
with