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procedural.js
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41 lines (34 loc) · 876 Bytes
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'use strict';
const validatePoint = (x, y) => {
const errors = [];
if (!Number.isFinite(x)) errors.push(new TypeError(`Invalid x: ${x}`));
if (!Number.isFinite(y)) errors.push(new TypeError(`Invalid y: ${y}`));
return errors;
};
const createPoint = (x, y) => {
const errors = validatePoint(x, y);
if (errors.length > 0) {
const cause = new AggregateError(errors, 'Validation');
throw new RangeError('Bad coordinates', { cause });
}
const point = { x, y };
return point;
};
const clone = (point) => {
const { x, y } = point;
return createPoint(x, y);
};
const move = (point, x, y) => {
point.x += x;
point.y += y;
};
const toString = (point) => {
const { x, y } = point;
return `(${x}, ${y})`;
};
// Usage
const p1 = createPoint(10, 20);
console.log(toString(p1));
const c1 = clone(p1);
move(c1, -5, 10);
console.log(toString(c1));