Reverse the ordering of words in a string

Question

I have this string s1 = \"My name is X Y Z\" and I want to reverse the order of the words so that s1 = \"Z Y X is name My\".

I can do it u

Answer 1

Actually, the first answer:

words = aString.split(" ");
for (i = 0; i < words.length; i++) {
    words[i] = words[words.length-i];
}

does not work because it undoes in the second half of the loop the work it did in the first half. So, i < words.length/2 would work, but a clearer example is this:

words = aString.split(" "); // make up a list
i = 0; j = words.length - 1; // find the first and last elements
while (i < j) {
    temp = words[i]; words[i] = words[j]; words[j] = temp; //i.e. swap the elements
    i++; 
    j--;
}

Note: I am not familiar with the PHP syntax, and I have guessed incrementer and decrementer syntax since it seems to be similar to Perl.