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JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects The Student Record Search Challenge Solution

Posted by Sal Mike
Sal Mike
71 Points

Can any one explain the below code: html += studentRecords(students[studentNames.indexOf(search)]);

Can any one explain the below code: html += studentRecords(students[studentNames.indexOf(search)]) ...????

The full code is below:

function print(message){ var div = document.getElementById("write"); div.innerHTML = message; }

function studentRecords(student){ html = "<h2> Student: " + student.name + "</h2>"; html += "<p> Track: " + student.track + "</p>"; html += "<p> Achievements: " + student.achievements + "</p>"; html += "<p> Points: " + student.points + "</p>"; return html; }

var students = [ { name: "Tom", track: "iOS Development", achievements: 43, points: 73839 }, { name: "Jerry", track: "Web Design", achievements: 23, points: 89498 }, { name: "Sam", track: "Front End Development", achievements: 86, points: 23187 }, { name: "Kim", track: "Back End Development", achievements: 24, points: 90594 }, { name: "Jane", track: "Java Development", achievements: 73, points: 87328 } ];

var search; var html = ""; var studentNames = [];

while(true){ search = prompt("Enter a Students Name: [or 'x' to quit]"); if (search === null || search.toLowerCase() === "x") { break; } for (var i = 0; i < students.length; i++) { studentNames.push(students[i].name.toLowerCase()); } if (studentNames.indexOf(search.toLowerCase()) > -1) { html += studentRecords(students[studentNames.indexOf(search)]); print(html); } else { print("<h2>" + search + " not found</h2>"); } break; }

1 Answer

Steven Parker
Steven Parker
230,995 Points
Steven Parker
Steven Parker
230,995 Points

Do you mean explain why it's not working? Unless you type a name in all lower case, it won't be found because it tries to find the name in an array that has already been converted.

If you mean explain what it does:

  • indexOf() :point_left: will give you the index number where search is found in the studentNames array
  • students[...] :point_left: will return the object at that index number of the students array
  • studentRecords(...) :point_left: is a function that converts the properties of that student object into a string
  • html += ... :point_left: and that string is then added on the end of the string named html