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54 lines
1.2 KiB
JavaScript
54 lines
1.2 KiB
JavaScript
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/**
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* Creates an instance of Circle.
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*
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* @constructor
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* @this {Circle}
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* @param {number} r The desired radius of the circle.
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*/
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function Circle(r) {
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/** @private */ this.radius = r;
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/** @private */ this.circumference = 2 * Math.PI * r;
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}
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/**
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* Creates a new Circle from a diameter.
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*
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* @param {number} d The desired diameter of the circle.
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* @return {Circle} The new Circle object.
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*/
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Circle.fromDiameter = function (d) {
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return new Circle(d / 2);
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};
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/**
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* Calculates the circumference of the Circle.
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*
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* @deprecated
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* @this {Circle}
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* @return {number} The circumference of the circle.
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*/
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Circle.prototype.calculateCircumference = function () {
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return 2 * Math.PI * this.radius;
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};
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/**
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* Returns the pre-computed circumference of the Circle.
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*
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* @this {Circle}
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* @return {number} The circumference of the circle.
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*/
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Circle.prototype.getCircumference = function () {
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return this.circumference;
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};
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/**
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* Find a String representation of the Circle.
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*
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* @override
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* @this {Circle}
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* @return {string} Human-readable representation of this Circle.
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*/
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Circle.prototype.toString = function () {
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return "A Circle object with radius of " + this.radius + ".";
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};
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