Javascript – Matrix indexing/flattening
I am given a matrix with dimensions dim = nxmx4. I would like to flatten this matrix to a new 1-dimensional matrix with length l = n*m*4 using 3 nested for-loops. for (let x = 0; x < n; x++)…
Efficient conversion of json data in R
I use R to process log files of zigbee2mqtt which logs entries like this head(data) [1] "info 2024-03-11 14:08:01: MQTT publish: topic 'zigbee2mqtt/TempBadEG', payload '{"battery":17,"humidity":50.1,"linkquality":105,"temperature":17.25,"voltage":2500}'" [2] "info 2024-03-11 14:08:04: MQTT publish: topic 'zigbee2mqtt/MotionBadOben', payload '{"battery":20,"battery_low":true,"illuminance":37914,"illuminance_lux":12369,"led_control":"off","linkquality":69,"occupancy":false,"occupancy_timeout":60,"tamper":false,"temperature":17,"update":{"installed_version":262147,"latest_version":262146,"state":"idle"},"voltage":2600}'" [3] "info 2024-03-11 14:08:04: MQTT…
Json – How to flatten a list of objects in python
I have a list of objects : [ { "person": "abc", "city": "united states", "facebooklink": "link", "address": "united states", "united states": [ { "person": "cdf", "city": "ohio", "facebooklink": "link", "address": "united states/ohio", "ohio": [ { "person": "efg", "city": "clevland", "facebooklink":…
create one array from two array with same key but diff value in php
I have two array with same key but diff value example : ( "2"=> 6, "5"=> 1 ), ( "2"=> 1, "5"=> 3 ) I want to create new array with the same key but replace highest value like this…
Json – Snowflake – FLATTEN() – How does it work internally?
I am learning Snowflake right now, and the way FLATTEN() works is a bit counter intuitive. A simple query. SELECT raw:first_name::STRING AS FName, raw:last_name::STRING AS LName, f.value::STRING AS Skill FROM tbl, TABLE(FLATTEN(raw:Skills)) f ORDER BY raw:id::INT LIMIT 5; Elegantly, it…
Laravel – Populate a flat array with a dynamic number of values from each row of a result set
I have 2 tables one is category that has subcategories and I want to fetch the records and put in a single array. I have implemented this code: public function searchItem(){ $categories = ServiceCategory::with('subCategories')->get(); $categoryArray = []; foreach ($categories as…
Json – pandas dataframe breaking long table to multiple tables
I have a dataframe which has a structure like below. id, name, value, employee_0_salary, employee_0_skills_0_id, employee_0_skills_1_id, employee_1_salary, employee_1_skills_0_id so on.. Basically formed from a flattened json. But the number of columns exceed 1024. I couldn't copy the structure of json…
Flattening the nested json file to dataframe using pandas json_normalise
I hace a big json file data and I want to convert it in to tabular form. I am trying to flatten the data in to dataframe using json_nomalise. so Far I have this : code so far I want…
How to produce a flat list of all values from a given JSON
I would like to produce a list of all values from any given JSON. The special requirement is that for values in nested attributes, all the values of parent's attributes must be repeated in the line. No keys must be…
Javascript – Function takes in a search string and a list of books and returns all of the books that match the search input (STUCK)
I have been given a task that I can't seem to wrap my head around to complete successfully and need some help with writing the code to complete the task. Any help getting this accomplished would be much appreciated. The…