Contents

class Triangle {
  constructor(...sides) {
    this.sides = sides;
  }

  kind() {
    if (this.isIllegal()) {
      throw new TypeError('illegal');
    }

    if (this.isEquilateral()) {
      return 'equilateral';
    }

    if (this.isIsosceles()) {
      return 'isosceles';
    }

    return 'scalene';
  }

  isIllegal() {
    return this.violatesInequality() || this.hasImpossibleSides();
  }

  violatesInequality() {
    const [a, b, c] = this.sides;
    return a + b < c || a + c < b || b + c < a;
  }

  hasImpossibleSides() {
    const [a, b, c] = this.sides;
    return a <= 0 || b <= 0 || c <= 0;
  }

  isEquilateral() {
    return this.uniqueSidesLength() === 1;
  }

  isIsosceles() {
    return this.uniqueSidesLength() === 2;
  }

  uniqueSidesLength() {
    return new Set(this.sides).size;
  }
}

export default Triangle;

Version data entries

396 entries across 396 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.179	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.178	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.177	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.176	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.175	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.174	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.173	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.172	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.171	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.170	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.169	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.167	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.166	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.165	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.164	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.163	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.162	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.161	tracks/ecmascript/exercises/triangle/example.js
trackler-2.2.1.160	tracks/ecmascript/exercises/triangle/example.js