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green: rotates left and move forward (gets out of grid)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,36 +1,43 @@ | ||
| export class MarsRover { | ||
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| private facingDirection: string = 'N' | ||
| private facingDirection: string = "N" | ||
| private xPosition: number = 0 | ||
| private yPosition: number = 0 | ||
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| constructor() {} | ||
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| private moveLeft() { | ||
| if (this.xPosition === 0) { | ||
| this.xPosition = 9 | ||
| return | ||
| } | ||
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| this.xPosition -= 1 | ||
| } | ||
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| public execute(command: string): string { | ||
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| command.split('').forEach((instruction) => { | ||
| switch(instruction) { | ||
| case 'M': | ||
| if (this.facingDirection == 'N') this.yPosition++ | ||
| else if (this.facingDirection == 'E') this.xPosition++ | ||
| else if (this.facingDirection == 'S') this.yPosition-- | ||
| else if (this.facingDirection == 'W') this.xPosition-- | ||
| break; | ||
| case 'L': | ||
| if (this.facingDirection == 'N') this.facingDirection = 'W' | ||
| else if (this.facingDirection == 'E') this.facingDirection = 'N' | ||
| else if (this.facingDirection == 'S') this.facingDirection = 'E' | ||
| else if (this.facingDirection == 'W') this.facingDirection = 'S' | ||
| break; | ||
| case 'R': | ||
| if (this.facingDirection == 'N') this.facingDirection = 'E' | ||
| else if (this.facingDirection == 'E') this.facingDirection = 'S' | ||
| else if (this.facingDirection == 'S') this.facingDirection = 'W' | ||
| else if (this.facingDirection == 'W') this.facingDirection = 'N' | ||
| break; | ||
| command.split("").forEach((instruction) => { | ||
| switch (instruction) { | ||
| case "M": | ||
| if (this.facingDirection == "N") this.yPosition++ | ||
| else if (this.facingDirection == "E") this.xPosition++ | ||
| else if (this.facingDirection == "S") this.yPosition-- | ||
| else if (this.facingDirection == "W") this.moveLeft() | ||
| break | ||
| case "L": | ||
| if (this.facingDirection == "N") this.facingDirection = "W" | ||
| else if (this.facingDirection == "E") this.facingDirection = "N" | ||
| else if (this.facingDirection == "S") this.facingDirection = "E" | ||
| else if (this.facingDirection == "W") this.facingDirection = "S" | ||
| break | ||
| case "R": | ||
| if (this.facingDirection == "N") this.facingDirection = "E" | ||
| else if (this.facingDirection == "E") this.facingDirection = "S" | ||
| else if (this.facingDirection == "S") this.facingDirection = "W" | ||
| else if (this.facingDirection == "W") this.facingDirection = "N" | ||
| break | ||
| } | ||
| }) | ||
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| return `${this.xPosition}:${this.yPosition}:${this.facingDirection}` | ||
| } | ||
| } |