I'd would like some guidance for below. I wish to convert this array from this:
[['a'], ['a1', 'a2'], ['b'], ['b1', 'b2', 'b4', 'b9']]
to something like this:
[['a', 'a1', 'a2'], ['b', 'b1', 'b2', 'b4', 'b9']]
so i can get a table like this:
a | b
---------
a1 | b1
a2 | b2
| b4
| b9
Is it possible to do so? Would be a bonus if can do it in ES6 format
So... basically your are organising your data as [[header],[...rows]].
I think something like this will work...
const input = [['a'], ['a1','a2'], ['b'], ['b1', 'b2', 'b3']];
const output = [];
while (true) {
const [header] = input.shift() || [];
if (!header) break;
const rows = input.shift() || [];
if (!rows.length) break;
output.push([header, ...rows]);
}
console.log(output);Make your array a square matrix by pushing into it empty values whre required
Transpose rows and columns
Sample:
function myFunction() {
var array1 = [['a1', 'a2'], ['b1', 'b2', 'b4']];
console.log(array1.map(row=>row.length))
var maxColumnNumber = Math.max(...array1.map(row=>row.length))
console.log(maxColumnNumber)
array1.forEach(function(row,i){
if(row.length < maxColumnNumber){
array1[i].push("");
}
})
console.log(array1)
array1 = transpose(array1);
console.log(array1)
}
function transpose(a) {
return Object.keys(a[0]).map(function(c) {
return a.map(function(r) { return r[c]; });
});
}
['a'] and ['a1', 'a2'] are meant to be concatenated? Because it will always be the first and second row?