Associative Array with keys from an Array of Strings in Javascript

Question

I am trying to form a word list in Javascript, whereby each word is a key in the dictionary and the value is true. My program takes a word and and checks whether the word is a valid word in the list or not. The list of words is stored in a text file where words are separated by new line. I scan these words as a string and split the string to obtain an array of strings which consist of all words. Now I am unable to form the associative array from this array. Here is my code:

var dict={};
var words;
function loadXMLDoc()
{
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
 }


xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
words=xmlhttp.responseText.split("\n");
for ( var i = 0; i < words.length; i++ ) {
       dict[words[i]] = true; //This Section of Code not working
}
}
 }


xmlhttp.open("GET","twl06.txt",true);
xmlhttp.send();
}
function check(str)
{
if(dict[str])
    alert("Correct");
else
    alert("Incorrect");
}

After doing a lot of tweaks with the code I have figured out that somehow the assosciative array is not being formed.

Here is the link to my full html/JS code: https://pastebin.com/2jwMcBfA

Answer 1

When you split I would sugest that you split on \r\n not only \n that will leave a \r trailing

Answer 2

Unless words[i] is an integer, you cannot use it as index for another array (JavaScript does not have associative arrays).

Best workaround is to do dict[words.indexOf(i)] /(edited)/ or some other way to convert words[i] to integer.