3d-interface/server/lib/Matrix.js

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JavaScript
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2015-11-13 10:36:54 +01:00
"use strict";
let fs = require('fs');
class OutOfBoundError extends Error {
constructor(matrix, i, j) {
super(`Index array out of bound (${i},${j}) exceeds (${matrix.lines}, ${matrix.columns}).`);
this.name = 'OutOfBoundError';
}
}
class Matrix {
constructor(lines, columns) {
// this.lines = lines;
// this.columns = columns;
this.data = [];
for (let i = 0; i < lines; i++) {
let line = [];
for (let j = 0; j < columns; j++) {
line.push(0);
}
this.data.push(line);
}
}
get(i, j) {
// if (i >= this.lines || j >= this.columns || i < 0 || j < 0 ) {
// this._throwOutOfBoundError(i,j);
// }
return this.data[i][j];
}
set(i, j, value) {
// if (i >= this.lines || j >= this.columns || i < 0 || j < 0 ) {
// this._throwOutOfBoundError(i,j);
// }
return this.data[i][j] = value;
}
print(type) {
if (type === 'matlab') {
let maxColumns = 0;
for (let i = 0; i < this.data.length; i++) {
if (this.data[i].length > maxColumns)
maxColumns = this.data[i].length;
}
let str = '[';
for (let i = 0; i < this.data.length; i++) {
str += '[';
for (let j = 0; j < maxColumns; j++) {
str +=
(this.data[i][j] !== undefined ? this.data[i][j] : 0) +
(j === maxColumns - 1 ? ']' : ',');
}
str += (i === this.data.length - 1 ? ']' : ';');
}
console.log(str + ';');
return;
}
// for (let i = 0; i < this.lines; i++) {
// for (let j = 0; j < this.columns; j++) {
// process.stdout.write(this.get(i,j) + ' ');
// }
// process.stdout.write('\n');
// }
}
toArray() {
return this.data;
}
fromArray(array) {
// if (! array instanceof Array)
// throw new TypeError('Parameter is not an array');
// let columns = null;
// for (let line of array) {
// if (! line instanceof Array)
// throw new TypeError('Parameter is not an array of array');
// if (columns === null) {
// columns = line.length;
// } else if (columns !== line.length) {
// throw new Typerror('The lines have not the same size');
// }
// }
this.data = array;
// this.columns = columns;
// this.lines = array.length;
}
saveToFile(path, type) {
if (type === 'matlab') {
fs.writeFileSync(path, JSON.stringify(this.data).replace('],', '];'));
return;
}
fs.writeFileSync(path, JSON.stringify(this.data));
}
loadFromFile(path) {
this.fromArray(JSON.parse(fs.readFileSync(path, 'utf-8')));
}
_throwOutOfBoundError(i,j) {
throw new OutOfBoundError(this, i, j);
}
};
module.exports = Matrix;
function main() {
var m = new Matrix(2,3);
m.set(1,2,3);
m.print();
m.saveToFile('tests/myMatrix.json');
console.log('----');
var m2 = new Matrix();
m2.loadFromFile('tests/myMatrix.json');
m2.print();
}
if (require.main === module) {
main();
}