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

matt mccherry
matt mccherry
4,493 Points
Posted by matt mccherry
matt mccherry
4,493 Points

Displaying first result twice? (Extra challenge problems)

For some reason, my first result is displayed twice with this coding. Not entirely sure why! So close it's fustrating!

var student;
var search;
var message = "";
var totalStudents = students.length;


function print(message) {
  document.write(message);
}

function outputReport(student) {
  var report = "<li>Name: " + student.name + "</li>";
  report += "<li>Track: " + student.track + "</li>";
  report += "<li>Achievements: " + student.achievements + "</li>";
  report += "<li>Points: " + student.points + "</li>";
  return report;
}

while (true) {
    search = prompt("What name would you like to search?")
    if (search === null || search.toLowerCase() === "quit") {
      break;
    }
  for (var i = 0; i < students.length; i++) {
    student = students[i];
    if (search.toLowerCase() === student.name.toLowerCase()) {
      message += outputReport(student);
      print(message);
    } else {
      totalStudents -= 1;
    }
    if(totalStudents === 0) {
      message+= "<h2>" + search + " is not in the list of names.</h2>";
      print(message);
    }
}
}

-Matt

1 Answer

matt mccherry
matt mccherry
4,493 Points
matt mccherry
matt mccherry
4,493 Points

This doesn't seem optimal but it fixed my problem, running a while within a while.

Any points would be appriciated anyway!

var student;
var search;
var message = "";
var totalStudents = students.length;


function print(message) {
  document.write(message);
}

function outputReport(student) {
  var report = "<li>Name: " + student.name + "</li>";
  report += "<li>Track: " + student.track + "</li>";
  report += "<li>Achievements: " + student.achievements + "</li>";
  report += "<li>Points: " + student.points + "</li>";
  return report;
}

while (true) {
    search = prompt("What name would you like to search?")
    if (search === null || search.toLowerCase() === "quit") {
      break;
    }
    while (totalStudents > 0) {
        for (var i = 0; i < students.length; i++) {
        student = students[i];
        console.log(student.name);
        if (search.toLowerCase() === student.name.toLowerCase()) {
            message += outputReport(student);
            print(message);
            totalStudents -= 1;
        } else {
        totalStudents -= 1;
        }
    if(message = "") {
      message+= "<h2>" + search + " is not in the list of names.</h2>";
      print(message);
    }
}
}
}

Additionally, I would of expected this code to work like this also but it doesn't any explanation?

while (true) {
    search = prompt("What name would you like to search?")
    if (search === null || search.toLowerCase() === "quit") {
      break;
    }
    while (totalStudents > 0) {
        for (var i = 0; i < students.length; i++) {
        student = students[i];
        console.log(student.name);

// changes made within this if

        if (search.toLowerCase() === student.name.toLowerCase()) {
            message += outputReport(student);
            print(message);
        } 
        totalStudents -= 1;
        }

//displays first Jody twice for some reason when done this way.

    if(message = "") {
      message+= "<h2>" + search + " is not in the list of names.</h2>";
      print(message);
    }
}
}