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JavaScript Object-Oriented JavaScript: Challenge Making the Game Interactive playToken() Method Solution

YONGJIN KIM
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YONGJIN KIM
Full Stack JavaScript Techdegree Graduate 20,287 Points
Posted by YONGJIN KIM
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YONGJIN KIM
Full Stack JavaScript Techdegree Graduate 20,287 Points

How come teacher did not add playToken() to handleKeydown()?

In the video, the teacher only codes playToken() method and jump to the demo page. It would be better to mention adding playToken() to handleKeydown() in the video. It could make students confused, although it is easy to catch it.

2 Answers

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

Your own assessment of "It could make students confused" is probably the best guess as to why it wouldn't be included in the instruction.

But spotting alternatives and potentially more compact/efficient solutions is a good indication of your learning progress and grasp of the material!

Timothy Andes
Timothy Andes
7,897 Points
Timothy Andes
Timothy Andes
7,897 Points

I think it was a mistake that they didn't show that part of the challenge. Within Game.js, the handleKeydown(e) method should now look like this, for reference: 

    /**
     * Branches code depending on what key the player presses.
     * @param {object} e - keydown event object.
     */
    handleKeydown(e) {
        if (this.ready) {
            if (e.key === "ArrowLeft") {
                this.activePlayer.activeToken.moveLeft();
            } else if (e.key === "ArrowRight") {
                this.activePlayer.activeToken.moveRight(this.board.columns);
            } else if (e.key === "ArrowDown") {
                this.playToken();
            }
        }
    }