maths.ts
Version:
Math utilities library for TypeScript, JavaScript and Node.js
121 lines (120 loc) • 3.6 kB
JavaScript
"use strict";
/**
* @author Hector J. Vasquez <ipi.vasquez@gmail.com>
*
* @licence
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
/**
* Represents an edge of a graph. It must provides a source, a destination
* and optionally a weight and name.
*/
class Edge {
/**
* Builds this with respective source, destination, weight(optional) and
* name(optional).
* @param _source The source of this.
* @param _destination The destination of this.
* @param weight The weight for this. It may be the result of a function
* or just a number.
* @param info Additional name for this.
*/
constructor(_source, _destination, weight, info) {
this._source = _source;
this._destination = _destination;
this.info = info;
if (typeof weight === 'number') {
this.weight = weight;
}
else {
this.setWeightFunction(weight);
}
this.info = info;
}
/**
* Returns the weight of this edge. If weight is given by a function it
* executes such function. If there is no weight defined it returns 1.
* If the weight is given by a number it just returns the number.
* @return The weight associated to this edge.
*/
get weight() {
if (this.weightFunction) {
return this.weightFunction(this.source, this.destination);
}
else if (this._weight === undefined) {
return 1;
}
else {
return this._weight;
}
}
/**
* Sets a weight for this.
* @param w The number to be the weight for this vertex.
*/
set weight(w) {
this._weight = w;
}
/**
* Gets the origin point of this.
* @return The source of this.
*/
get source() {
return this._source;
}
/**
* Sets the origin point for this.
* @param value The vertex wanted to be the source of this edge.
*/
set source(value) {
this._source = value;
}
/**
* Gets the destination for this.
* @return The destination of this.
*/
get destination() {
return this._destination;
}
/**
* Sets the destination for this.
* @param value The new destination for this.
*/
set destination(value) {
this._destination = value;
}
/**
* Sets a weight function for this vertex.
* @param f A function receiving the two vertex adjacent to this to
* calculate weight for this.
*/
setWeightFunction(f) {
this.weightFunction = f;
}
/**
* Removes the weight function.
*/
removeWeightFunction() {
this.weightFunction = undefined;
}
/**
* Returns this as an coordinate: (source, destiny, weight).
* @return The representation of this.
*/
toString() {
return '(' + this.source.name + ', ' + this.destination.name +
(this.weight !== undefined ? ', ' + this.weight : '') + ')';
}
}
exports.default = Edge;