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

Roberto Hori
Roberto Hori
5,047 Points
Posted by Roberto Hori
Roberto Hori
5,047 Points

My solution to the challenge

I just used indexOf.

for (var i = 0; i < students.length; i += 1) {
  student = students[i];
  if(student.name.toUpperCase().indexOf(search.toUpperCase())>-1){  
    message += '<h2>Student: ' + student.name + '</h2>';
    message += '<p>Track: ' + student.track + '</p>';
    message += '<p>Points: ' + student.points + '</p>';
    message += '<p>Achievements: ' + student.achievements + '</p>';
  }
}

1 Answer

Iain Simmons
MOD
Iain Simmons
Treehouse Moderator 32,305 Points
Iain Simmons
Iain Simmons
Treehouse Moderator 32,305 Points

Yeah I did too, but Dave hasn't mentioned in the videos that indexOf can be used on strings, in addition to arrays.

Here's my solution:

var html = '';

function print(nodeID, message) {
  document.getElementById(nodeID).innerHTML = message;
}

function buildDefinitionList(obj) {
  var prop;
  var dListHTML = '<dl>';
  for (prop in obj) {
    dListHTML += '<dt>' + prop.charAt(0).toUpperCase() + prop.slice(1) + '</dt>';
    dListHTML += '<dd>' + obj[prop] + '</dd>';
  }
  dListHTML += '</dl>';
  return dListHTML;
}

function buildStudentList(list) {
  var i;
  var uListHTML = '<ul>';
  for (i = 0; i < list.length; i++) {
    uListHTML += '<li>' + buildDefinitionList(list[i]) + '</li>';
  }
  uListHTML += '</ul>';
  return uListHTML;
}

function getMatchingStudents(list) {
  var query;
  var i;
  var resultList;
  // keep looping until the user quits
  while(true) {
    // reset the result list
    resultList = [];
    // prompt and convert to lowercase
    query = prompt("Search student records: type a name [Iain] (or type 'quit' to end)");
    // check if they want to quit
    if (query === null || query.toLowerCase() === 'quit') {
      break;
    }
    // loop through students and check if the name contains the search query
    for (i = 0; i < list.length; i++) {
      if (list[i].name.toLowerCase().indexOf(query.toLowerCase()) > -1) {
        // if so, push to the result list
        resultList.push(list[i]);
      }
    }    
    // if there are results
    if (resultList.length > 0) {
      // build the list of matching students
      html = buildStudentList(resultList);
    } else {
      // otherwise print a friendly not found message
      html = '<p>Sorry, there are no students matching that name</p>';
    }    
    // print html to output div
    print('output', html);
  }
}

getMatchingStudents(students);