How to use 'multidimensional array in jquery' in JavaScript

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export function transformMultiDimArray(array: (string | string[])[], maxLength: number): string[][] {
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    const newArray: string[][] = array.map(row => {
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        if (row instanceof Array && row.length < maxLength) {
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            return row.concat(Array(maxLength - row.length).fill(''));
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        }
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        if (maxLength === 0 || maxLength === 1) {
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            return [row];
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        }
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        if (row instanceof String || typeof(row) === 'string') {
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            return Array(maxLength).fill(row);
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        }
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        return row;
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    });
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    return newArray;
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}

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function createNDimensionArray(multidimensional, dimensions, position, cb) {
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  var width;
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  var rest;
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  var newArray;
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  var i;
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  var currentDimension;
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  var returnValue;
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  if (dimensions.length > 0) {
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    width = dimensions[0];
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    rest = dimensions.slice(1);
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    newArray = [];
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    currentDimension = position.length - 1 - rest.length;
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    position[currentDimension] = 0;
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    for (i = 0; i < width; i++) {
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      newArray[i] = createNDimensionArray(multidimensional, rest, position, cb);
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      position[currentDimension]++;
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    }
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    returnValue = newArray;
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  } else {
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    if (typeof cb === 'function') {
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      returnValue = cb(position.slice(), multidimensional);
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    } else if (cb !== undefined) {
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      returnValue = cb;
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    } else {
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      returnValue = null;
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    }
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  }
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  return returnValue;
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}