877acb5a8f
- Implemented exercises for array high-order methods, memory and execution, switch statements, and final review. - Added starter and answer files for each exercise to facilitate learning. - Created a runner HTML file to execute JavaScript code and display console outputs. - Updated README files to include exercise objectives, tasks, and usage instructions.
71 lines
1.8 KiB
JavaScript
71 lines
1.8 KiB
JavaScript
const reviewer = {
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name: "林晨",
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stage: "final-review",
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showTitle() {
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console.log(`${this.name} 的学习营总复盘`);
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},
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};
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const lessons = [
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{ title: "变量", score: 80, finished: true },
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{ title: "闭包", score: 92, finished: true },
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{ title: "this", score: 87, finished: true },
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{ title: "补漏练习", score: null, finished: false },
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{ title: "综合回顾", score: 95, finished: true },
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];
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let mentorNote;
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const reviewComment = null;
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function getStageText(stage) {
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switch (stage) {
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case "basic":
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return "基础阶段";
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case "advanced":
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return "补充阶段";
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case "final-review":
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return "总复习阶段";
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default:
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return "未知阶段";
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}
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}
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reviewer.showTitle();
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console.log("阶段说明：", getStageText(reviewer.stage));
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console.log("mentorNote 是否为 undefined：", mentorNote === undefined);
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console.log("reviewComment 是否为 null：", reviewComment === null);
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const validLessons = [];
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for (let index = 0; index < lessons.length; index += 1) {
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const lesson = lessons[index];
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if (lesson.score === undefined || lesson.score === null) {
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console.log(`在《${lesson.title}》处遇到空成绩，停止读取后续项目。`);
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break;
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}
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validLessons.push(lesson);
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}
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const lessonTitles = validLessons.map(function (lesson) {
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return lesson.title;
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});
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const averageScore =
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validLessons.reduce(function (total, lesson) {
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return total + lesson.score;
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}, 0) / validLessons.length;
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const allFinished = validLessons.every(function (lesson) {
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return lesson.finished === true;
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});
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const reviewerAlias = reviewer;
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reviewerAlias.stage = "advanced";
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console.log("引用修改后的 reviewer.stage：", reviewer.stage);
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console.log("有效课程：", lessonTitles.join("、"));
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console.log("平均分：", averageScore);
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console.log("是否全部完成：", allFinished);
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