combine list remove dups

[jt107]

I have two list as following want to combine, but could not, please help.

list1 = "a,b,c,d,e,f";
list2 ='d,f,w,x,y";

need it to be : a,b,c,d,e,f,w,x,y

Thanks

[savvykms]

Pretty easy 3 stages. Combine the two arrays, remove duplicates (except for 1 copy), then sort.

var list1 = "a,b,c,d,e,f";
var list2 = "d,f,w,x,y";
var list1split = list1.split(',');
var list2split = list2.split(',');
var combined_raw = new Array();
var combined_unique = new Array();
var combined_final = new Array();
var i;
var x;

//append list1split and list2split into combined_raw
  for (i = 0; i < list1split.length; i++) { combined_raw[combined_raw.length] = list1split[i]; }
  for (i = 0; i < list2split.length; i++) { combined_raw[combined_raw.length] = list2split[i]; }

//turn combined_raw into combined_unique, omitting duplicates
  for (i = 0; i < combined_raw.length; i++) {
  var found = false;
    for (x = 0; x < combined_unique.length; x++) {
      if (combined_unique[x] == combined_raw[i]) { found = true; break; }
    }
    if (!found) {
    combined_unique[combined_unique.length] = combined_raw[i];
    }
  }

//sort combined_unique into combined_final
combined_final = combined_unique.sort();

document.write("<p>\n");
document.write("<p>list1split = "  + list1split.sort() + "<br />\n");
document.write("list2split = "     + list2split.sort() + "<br />\n");
document.write("combined_final = " + combined_final    + "<br />\n");
document.write("</p>\n"); 

[JMRKER]

Try this:

<script type="text/javascript">
// From: http://www.webdeveloper.com/forum/showthread.php?t=248156

// Following from: http://stackoverflow.com/questions/1584370/how-to-merge-two-arrays-in-javascript
Array.prototype.uniqueMerge = function( a ) {
    for ( var nonDuplicates = [], i = 0, l = a.length; i<l; ++i ) {
        if ( this.indexOf( a[i] ) === -1 ) {
            nonDuplicates.push( a[i] );
        }
    }
    return this.concat( nonDuplicates )
};

var list1 = ['a','b','c','d','e','f'];
var list2 = ['d','f','w','x','y'];
var list3 = [];
    list3 = list1.uniqueMerge(list2);

alert(list1.join('\n'));
alert(list2.join('\n'));
alert(list3.join('\n'));

</script>

[jt107]

Thanks for the response. I like the solution, 2 questions if I may ask, how could I make it work for IE? it works for firefox ok but not for my IE browser. How could I use it if the two list values come from input textbox. Appreciate your help.

[jt107]

Thanks for your help. This one works perfectly. Appreciate your help!

[JMRKER]

Thanks for the response. I like the solution, 2 questions if I may ask, how could I make it work for IE? it works for firefox ok but not for my IE browser. How could I use it if the two list values come from input textbox. Appreciate your help.

Thanks for your help. This one works perfectly. Appreciate your help!

Just saw you questions...
then assuming you are referring to post #3 ...
AFAIK, the solution does work in MSIE. Might be your set-up, but I assume you have solved this portion because of the next post.

Conversion of a string to an array is relatively simple:

// one possibility
var list = 'a b c d e f'.split (' ');
// or even
var list = 'abcde'.split('');

You should be able to acquire the text from the <input> element using .value syntax.

Again, I assume you have solved this as well because of the last post.

Therefore, you're most welcome, I'm sure, from both of use regardless of which solution you use.
Happy to help.
Good Luck!


BTW: You should mark thread as resolved if you are satisfied with the solutions presented.

[jt107]

Thanks again. That is a very helpful explanation.

[007Julien]

What about this script ?

	list1 = "a,b,c,d,e,f";
	list2 ="d,f,w,x,y";
	list=(list1+","+list2).split(/,/g).sort().join(',');
alert(list)
	while (list!=(listNoDubs=list.replace(/(,[^,]+)\1/,'$1'))) list=listNoDubs;
alert(list)

[007Julien]

One line is enough !

	list1 = "a,b,c,d,e,f";
	list2 ="d,f,w,x,y";
	list=(list1+","+list2).split(/,/g).sort().join(',').replace(/(,[^,]+)\1/g,'$1');

Never pay webdeveloppers with lines !

[jt107]

One line is enough !

	list1 = "a,b,c,d,e,f";
	list2 ="d,f,w,x,y";
	list=(list1+","+list2).split(/,/g).sort().join(',').replace(/(,[^,]+)\1/g,'$1');

Never pay webdeveloppers with lines !

Come on, you make it so easy! hope people have some sense and not say, there are 10 thousand lines of code any more.

[jt107]

One line is enough !

	list1 = "a,b,c,d,e,f";
	list2 ="d,f,w,x,y";
	list=(list1+","+list2).split(/,/g).sort().join(',').replace(/(,[^,]+)\1/g,'$1');

Never pay webdeveloppers with lines !

Could you show me how could I make it work with space demiliter list?
list1 = "a b c d e f";
list2 ="d f w x y";
list=(list1+" "+list2).split(/ /g).sort().join(' ').replace(/(s[^s]+)\1/g,'$1');
alert(list);

Thanks a lot.

[jt107]

Ok find the problem, here is the corrent syntax:
list=(list1+" "+list2).split(/ /g).sort().join(' ').replace(/(\s[^\s]+)\1/g,'$1');

Thanks again!

[007Julien]

Bravo !