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javascriptarrayssub-array

Dividing an array into two arrays

I have an array (rows) with n nodes. Each node contains 6 elements.

Example:

rows[0]: ["1", "Text", "0", "55", "0", "Text 2"]
rows[1]: ["2", "Another Text", "15.5", "55", "16.6", "Another Text 2"]
...
rows[n]: [...]

I want to put the second element (like ["Text", "Another Text", ...]) from all of rows [n] into the separate array

and

I want to put the third and the fifth elements(like [[0, 0], [15.5, 16.6], ...]) into the separate array too. I think I need foreach in the foreach.

Solution

  • This is one of the multiple approaches (It uses Array#forEach),

    let arrays = [
 ["1", "Text", "0", "55", "0", "Text 2"],
 ["2", "Another Text", "15.5", "55", "16.6", "Another Text 2"]
];

let withIndex1 = [];
let withIndex2And4 = [];

arrays.forEach((arr) => {
  withIndex1.push(arr[1]);
  withIndex2And4.push([arr[2],arr[4]]);
});