Transpose rows to column grouped by a column in Googles Sheets - google-apps-script

Question

Change data in Google sheet for better understanding based on a column value
From this:
entity_id | data_key | data_value
1 | name | some name
1 | author | john
1 | likes | 12
2 | name | another name
2 | author | sam
3 | name | different name
3 | author | mary
3 | likes | 3
To this:
entity_id | name | author | likes
1 | some name | john | 12
2 | another name | sam |
3 | different name| mary | 3
I checked features like transpose, it falls short of what I actually need.

Answer 1

Run the function in the below snippet as a custom function:
const data = [
['entity_id', 'data_key', 'data_value'],
[1, 'name', 'some name'],
[1, 'author', 'john'],
[1, 'likes', 12],
[2, 'name', 'another name'],
[2, 'author', 'sam'],
[3, 'name', 'different name'],
[3, 'author', 'mary'],
[3, 'likes', 3],
];
/**
*#customfunction
*/
const myTranspose = range => {
range.shift();
const headers = [];
const undefToStr = value => (undefined === value ? '' : value);
const obj = range.reduce((acc, row) => {
if (!acc[row[0]]) acc[row[0]] = {};
acc[row[0]][row[1]] = row[2];
if (-1 === headers.indexOf(row[1])) headers.push(row[1]);
return acc;
}, {});
return Object.entries(obj).reduce(
(acc, entry) => {
const row = [entry[0]];
headers.forEach(header => row.push(undefToStr(entry[1][header])));
acc.push(row);
return acc;
},
[['entity_id', ...headers]]
);
};
console.log(myTranspose(data));
The result of the function in Google Sheets:
The function first builds and then transposes it into a new 2D array.

Answer 2

Assuming that data is located columns A to C
={A1,transpose(unique(B2:B));arrayformula(ROW(A2:A)-1),arrayformula(iferror(vlookup((row(A2:A)-1)&"|"&transpose(unique(B2:B)),{arrayformula(A2:A&"|"&B2:B),arrayformula(C2:C)},2,0)))}
https://docs.google.com/spreadsheets/d/12LOBTcialZ8wef9enII-hFsjrRnuOhx35_EXtg4Zreo/copy

Answer 3

Try
=newTab(A1,A2:C9)
with custom function
function newTab(title,data){
var headers=[]
var items = new Map()
var n = 0
data.forEach(function(elem){
items.set(elem[1],'')
n= Math.max(n,elem[0])
})
items.forEach(function(value, key) {headers.push(key)})
var result = Array.from({ length: n + 1 }, () => Array.from({ length: headers.length + 1 }, () => ''));
result[0] = [title, ...headers]
data.forEach(function(elem){
result[elem[0]][headers.indexOf(elem[1])+1]=elem[2]
result[elem[0]][0]=elem[0]
})
return(result)
}
https://docs.google.com/spreadsheets/d/12LOBTcialZ8wef9enII-hFsjrRnuOhx35_EXtg4Zreo/copy