@rayyamhk/matrix/lib/core/utils/row.js

A professional, comprehensive and high-performance library for you to manipulate matrices.

"use strict";

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

var _require = require('../../Error'),
    INVALID_ROW_COL = _require.INVALID_ROW_COL,
    OVERFLOW_ROW = _require.OVERFLOW_ROW,
    INVALID_MATRIX = _require.INVALID_MATRIX;
/**
 * Gets the row of a Matrix with valid index.
 * @memberof Matrix
 * @static
 * @param {Matrix} A - Any Matrix
 * @param {number} index - Any valid row index
 * @returns {Matrix} Row of A
 */


function row(A, index) {
  if (!(A instanceof this)) {
    throw new Error(INVALID_MATRIX);
  }

  if (!Number.isInteger(index) || index < 0) {
    throw new Error(INVALID_ROW_COL);
  }

  var _A$size = A.size(),
      _A$size2 = _slicedToArray(_A$size, 2),
      r = _A$size2[0],
      c = _A$size2[1];

  if (index >= r) {
    throw new Error(OVERFLOW_ROW);
  }

  var matrix = A._matrix;
  return this.generate(1, c, function (i, j) {
    return matrix[index][j];
  });
}

;
module.exports = row;