Contents

enum Type {
    Equilateral = "equilateral",
    Isosceles = "isosceles",
    Scalene = "scalene"
}

export default class Triangle {
    sides: number[]

    constructor(...sides: number[]) {
        this.sides = sides
    }

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

        if (this.isEquilateral()) {
            return Type.Equilateral
        }

        if (this.isIsosceles()) {
            return Type.Isosceles
        }

        return Type.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
    }

}

Version data entries

134 entries across 134 versions & 1 rubygems

Version	Path
trackler-2.2.1.119	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.118	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.117	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.116	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.115	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.114	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.113	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.111	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.110	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.109	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.108	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.107	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.106	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.105	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.104	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.103	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.102	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.101	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.100	tracks/typescript/exercises/triangle/triangle.example.ts
trackler-2.2.1.99	tracks/typescript/exercises/triangle/triangle.example.ts