How do I sort an array in JavaScript?

Question

In an array T we have values [b,a,d,c]. How to reorder this array in a single loop in the aim to get [a,b,c,d]?

• Gumbo: [] is an array, {} would rather denoting an object.
• KooiInc: search in SO using "javascript array sort" 3,067 results. Didn't those results pop up when you where typing your question?
• Soufiane Hassou: Kooilnc: Maybe he's asking about an O(n) sorting algorithm and not a built in function to do it? At least, that's the feeling I'm getting from read the question
• KooiInc: @Soufiane Hassou: turns out his question meant something quite different, as far as I understand.

Answer 1

you can use the .sort() method like:

var T = new Array('a', 'd', 'c', 'b');
T.sort();

I don't really understand what do you mean by "reordering" (maybe sorting in some random order :)

however you can always use for for example:

// create new array
var U = new Array();
for (i=0; i<T.length; i++) {
 // some desired condition
 if (T[i] <= 1) {
 // put the value ( T[i] ) on the desired position
 desired_position = ???
 U[desired_position] = T[i];
 }
 else {
 // otherwise put it at the end of the array
 U.push(T[i]);
 }
}
// and here you have the "reordered" array 
alert('the array U is reordered !!');

• suba: thanks.. but i am not asking sorting.. i just want to reorder elements for eg: {e,t,m,a} to {t,e,a,m}
• KooiInc: @suba: than I suggest you to change your question into: How do I sort an array to a certain predefined order [in Javascript]? (and combine it with te later asked same SO question)
• Teneff: @suba what should be the criteria for ordering ? How the function should order the array if it looks like this ['h','e','l','l','o'];
• Lee Kowalkowski: @suba: If you're not asking about sorting, what does your question mean? Incidentally, the sort() function accepts as a parameter a reference to a function that handles the comparison between two array elements, so you can implement whatever order you can algorithmically conceive: javascriptkit.com/javatutors/arraysort.shtml