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

Mick Webb
Mick Webb
2,247 Points
Posted by Mick Webb
Mick Webb
2,247 Points

Code won't work for solution: No syntax errors that I can see, code won't print to browser:

Here is my code: (students.js):

var students = [ { name: 'Mike', track: 'Front End Development', achievements: 158, points: 14370 }, { name: 'Jody', track: 'Front End Development', achievements: 158, points: '16375' }, { name: 'Jordan', track: 'PHP Development', achievements: '55', points: '2025' }, { name: 'John', track: 'Learn Wordpress', achievements: '40', points: '1950' }, { name: 'Trish', track: 'Rails Development', achievements: '5', points: '350' } ];

var message = ""; var student; var search;

function print(message){ var divOutput = document.getElementById('output'); divOutput.innerHTML = message; }

function getStudentReport(student) { var report = '<h2>Student: ' + student.name + '</h2>'; report += '<p>Track: ' + student.track + '</p>'; report += '<p>Points: ' + student.points + '</p>'; report += '<p>Achievements: ' + student.achievements + '</p>'; return report; }

while (true){ search = prompt('Search student records: type a name [Jody] (or type 'quit' to end)'); if (search.toLowerCase() === 'quit'){ break; } } for (var i = 0; i < students.length; i++) { student = students[i]; if (student.name === search){ message = getStudentReport( student); print(message); } } }

Jeff Waite
Jeff Waite
8,257 Points

I haven't reviewed your code, but did you notice the teacher's note?

Important Update

Since this video was shot, the behavior of most browsers has changed, so you won't see the same thing as I demonstrate in the video. In the video, you'll see that my script is able to print out to the browser using document.write( ) while inside a loop.

Most browsers no longer do that: they wait until the loop finishes and then they print to the window. So, you'll see a blank page until you type quit in the prompt window — then you'll see all the output printed to the screen.

He specifically mentions document.write() in this explanation, but apparently his print() function suffers from the same issue.

2 Answers

Jeff Waite
Jeff Waite
8,257 Points
Jeff Waite
Jeff Waite
8,257 Points

You've got a problem with your string formatting in the search prompt-- The 'quit' should be in double quotes (") or conversely, the entire string should be encapsulated with double quotes. You've also got two closing curly brackets after your break command in your first if statement in your while loop.

while (true){ search = prompt('Search student records: type a name [Jody] (or type 'quit' to end)'); if (search.toLowerCase() === 'quit'){ break; } }

Mick Webb
Mick Webb
2,247 Points
Mick Webb
Mick Webb
2,247 Points

the only thing that shows up is the header, and the search function does not pop up.