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JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects The Build an Object Challenge, Part 2

Arsalan Raja
Arsalan Raja
6,508 Points
Posted by Arsalan Raja
Arsalan Raja
6,508 Points

How can i search specific name in my array?

 var students = [ 
  { 
   name: 'Dave',
    track: 'Front End Development',
    achievements: 158,
    points: 14730
  },
  {
    name: 'Jody',
    track: 'iOS Development with Swift',
    achievements: '175',
    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 reaponse;
var html;

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


for(var i = 0; i < students.length; i++) {
  var studentName =  students[i].name;
  var studentTrack = students[i].track;
  var studentAchievements = students[i].achievements;
  var studentPoints =  students[i].points;

  response =  prompt("Enter student name? or type 'quit' for exit");

  if( response === "quit"){
    break;
  }

  else if(response === studentName) {

    html = "<h2> " +studentName+ "</h2>";4
    html += "<p>Track: " + studentTrack + "</p>";
    html += "<p>Achievements: " + studentAchievements + "</p>";
    html += "<p>Points: " + studentPoints + "</p>";
  }
  else if(response !== studentName) {
    html = "Not found";
  }  

    print(html);

}

Edited to display the markdown correctly. :-)

2 Answers

Jonathan Grieve
MOD
Jonathan Grieve
Treehouse Moderator 91,252 Points
Jonathan Grieve
Jonathan Grieve
Treehouse Moderator 91,252 Points

Hi there,

It looks like you have a typo when you're declaring your response variable for the first time. Change your variable just under the students object from reaponse to response

Good luck. :-)

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

This won't really work as a search, because you're showing a prompt in each iteration of the loop, and it will only work if the response matches the student at the current index.

Instead, you should use a while loop to show the prompt, check for quit, and then if a name is typed in, loop through the students array and check for each item in the array if that item has a name property that matches the response.

Like so:

var students = [ 
{ 
  name: 'Dave',
  track: 'Front End Development',
  achievements: 158,
  points: 14730
},
{
  name: 'Jody',
  track: 'iOS Development with Swift',
  achievements: 175,
  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 response;
var html;
var found = false;
var studentName;
var studentTrack;
var studentAchievements;
var studentPoints;
var i;

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

// loop continuously until found is set to true or the user quits
while (!found) {
  response = prompt("Enter student name or type 'quit' for exit");

  if (response.toLowerCase() === "quit") {
    // break out of the while loop
    break;
  }
  else {
    // initially set html to not found,
    // and only change if something matches
    html = "Not found";

    for(i = 0; i < students.length; i++) {
      studentName =  students[i].name;
      studentTrack = students[i].track;
      studentAchievements = students[i].achievements;
      studentPoints =  students[i].points;
      // convert to lowercase so they don't need
      // to get the capitalisation correct
      if (response.toLowerCase() === studentName.toLowerCase()) {
        // set found to true to stop the while loop
        found = true;
        // set the html output
        html = "<h2>" + studentName + "</h2>";
        html += "<p>Track: " + studentTrack + "</p>";
        html += "<p>Achievements: " + studentAchievements + "</p>";
        html += "<p>Points: " + studentPoints + "</p>";
        // break out of the for loop
        break;
      }
      // you don't want an else in the for loop,
      // because you don't want to do something for
      // every item that doesn't match
    }
  }

  // print either the not found message or the matching student  
  print(html);
}