deathprofessor-js-lab1/main.js

This is the best lab1 ever!

class Lab1 {
	task1(str = "") {
		return str
			.toLowerCase()
			.split("")
			.map((char, index, array) => array.indexOf(char) === array.lastIndexOf(char) ? "(" : ")")
			.join("");
	}
	task2(data) {
		return (function () {
			let _rows, _cols, _grid;
			const init = function (data) {
				_reorganizeData(data);
				return this;
			};
			const isValid = function () {
				return (_validate(_rows) && _validate(_cols) && _validate(_grid));
			};
			const _validate = function (data) {
				for (let row = 0; row < 9; row++) {
					data[row].sort();
					for (let col = 0; col < 9; col++) {
						const value = data[row][col], next_value = data[row][col + 1];
						if (!(value && value > 0 && value < 10)) return false;
						if (col !== 8 && value === next_value) return false;
					}
				}
				return true;
			};
			const _reorganizeData = function (data) {
				_rows = data;
				_cols = [];
				_grid = [];
				for (let i = 0; i < 9; i++) {
					_cols.push([]);
					_grid.push([]);
				}
				for (let row = 0; row < 9; row++) {
					for (let col = 0; col < 9; col++) {
						_cols[col][row] = data[row][col];
						const gridRow = Math.floor(row / 3);
						const gridCol = Math.floor(col / 3);
						const gridIndex = gridRow * 3 + gridCol;
						_grid[gridIndex].push(data[row][col]);
					}
				}
			};
			return { init: init, isValid: isValid };
		})().init(data).isValid();
	}
}
module.exports = Lab1;