Matrix
// import { toString } from '../ext/helpers.js';
import {
matrix,
matrixMap,
matrixMax,
matrixMin,
matrixToString,
matrixToHTMLTable,
} from '../ext/Array.js';
// version 1.3
// + matrix.min(f)
/**
* Matrix
* ------
* ```
* new Matrix(3, 2, 'x')
* new Matrix([[1,2,3], [4,5,6]])
* ```
* ### Methods
* - matrix.map(f)
* - matrix.max(f)
* - matrix.min(f)
* - matxix.copy()
* - matrix.toString(padString)
*
* ### Properties
* - matrix.cells
* - matrix.tableHTML
* - matrix.numberOfRows
* - matrix.numberOfColumns
*/
export class Matrix {
/**
* new instance of Matrix
* @param {number|any[][]} m - number of rows, or 2D array
* @param {number} n - number of columns
* @param {any} fill - value to fill the matrix with
*/
constructor(m, n, fill) {
// if m is not an positive integer,
// it is expected to be a matrix (2D array)
this.cells = Array.isArray(m[0]) ? m : matrix(m, n, fill);
}
// โญ๏ธ matrix.map((cell, i, j) => ...) -> new Matrix
map(f) {
let m = matrixMap(this.cells, f);
return new Matrix(m);
}
// max of the matrix
max(f = (x) => x) {
return matrixMax(this.cells, f);
}
// min of the matrix
min(f = (x) => x) {
return matrixMin(this.cells, f);
}
// deep copy an array (make sure we won't SHARE arr with outer code)
// for internal use only, external code should use `matrix.cells`.
_deepCopy(arr) {
return JSON.parse(JSON.stringify(arr));
}
// matrix.numberOfRows
get numberOfRows() {
return this.cells.length;
}
// matrix.numberOfColumns
get numberOfColumns() {
return this.cells[0].length;
}
// matrix.copy()
copy() {
return new Matrix(this._deepCopy(this.cells));
}
// matrix.toString()
toString(padString = ' ') {
return matrixToString(this.cells, padString);
}
// matrix.tableHTML
get tableHTML() {
return matrixToHTMLTable(this.cells);
}
} // end: Matrix
codesandbox โฉ Matrix & GameOfLife (1.1)
Array โฉ matrix methods
Last updated