Pretty Print 2D Array data in terminal or console

columnify.js

/**
 * columnify - Pretty Print 2D array to terminal or console
 *
 * @prop {Array} colsArr 2D array (table)
 * @prop {Integer} tabs Number of max tabs (default 0)
 * @return {String} Table-ordered values tab-separated with newlines
 */
 
const columnify = (colsArr, tabs) => {
  const cols = colsArr[0].length;
  const max = {};
  return colsArr.flat().map((v, i) => {
    v = (''+v).trim();
    const c = i % cols;
    let vl = v.length;
    if(!(vl % 4)) vl += 1;
    const t = Math.ceil(vl / 4);
    max[c] |= 0;
    if(max[c] < t) max[c] = t;
    return {v, c, t};
  }).map(ob => {
    const td = max[ob.c] + 1 + (tabs||0) - ob.t
    return `${ob.v}${'\t'.repeat(td)}${ob.c+1===cols?'\n':''}`
  }).join('');
}

/* EXAMPLE:

console.log(
  columnify([
    ["COL 1", "COL 2", "  COL 3  "],
    ["aaaa", "11112", "aaaab"],
    ["aaaabbbbccc", "1111", "aaa"],
    ["aaaabbb", "11112222", "aaa"],
  ], 0)
);

// RESULT

COL 1       COL 2       COL 3			
aaaa        11112       aaaab		
aaaabbbbccc 1111        aaa			
aaaabbb     11112222    aaa		

*/