I need to show an object with the existing attribute list and showing a number of how many times it appears:
Payload:
[
[
"valor"
],
[
"tipo de entrada",
"data entrada",
"valor"
],
[
"tipo de entrada",
"data entrada",
"valor"
],
[
"tipo de entrada"
],
[
"tipo de entrada"
],
[
"tipo de entrada"
],
[
"valor"
],
[
"valor"
],
[
"valor"
],
[
"valor"
],
[
"tipo de entrada",
"data entrada",
"valor"
]
]
Result:
{
valor: 16,
tipo_entrada: 9,
dqta_entrada: 6
}
being that list of attributes dynamically, it can contain other values (value, name, age ...)
You can flatten your array using array#flat() and then using array#reduce count the frequency of each word.
const arr = [ [ "valor" ], [ "tipo de entrada", "data entrada", "valor" ], [ "tipo de entrada", "data entrada", "valor" ], [ "tipo de entrada" ], [ "tipo de entrada" ], [ "tipo de entrada" ], [ "valor" ], [ "valor" ], [ "valor" ], [ "valor" ], [ "tipo de entrada", "data entrada", "valor" ] ],
result = arr.flat().reduce((r, word) => {
r[word] = (r[word] ?? 0) + 1;
return r;
},{});
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0; }Here's a one-liner :
var mainData = [ [ "valor" ], [ "tipo de entrada", "data entrada", "valor" ], [ "tipo de entrada", "data entrada", "valor" ], [ "tipo de entrada" ], [ "tipo de entrada" ], [ "tipo de entrada" ], [ "valor" ], [ "valor" ], [ "valor" ], [ "valor" ], [ "tipo de entrada", "data entrada", "valor" ] ]
var resultObj = {};
mainData.map(data => data.forEach(subData => { resultObj[subData] = (Object.keys(resultObj).indexOf(subData) == -1 ? 1 : resultObj[subData] + 1) }))
console.log(resultObj)You can use flat and play around with it.
This code defines and explain a way of resolving your problem:
const result = {};
const initialArray = [['tomato'], ['ketchup', 'potato']];
const strings = initialArray.flat(); // ['tomato', 'ketchup', 'potato']
for (const string of strings) {
// string is 'tomato' for example
// result[string] would then be result[tomato]
if (result[string]) {
result[string] += 1; // result.tomato already exists? Add 1 to it
} else {
result[string] = 1; // if it does not exists, create it with value 1
}
}