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Compare multiple numbers for lotto check form

Answer 1

A:

I'm assuming that you want the user to type in a series of numbers, and then compare them against another set to see if they match.

The process will be something like this:

Get the numbers from the inputs on the page, store into an array.
Compare that array with another array to see if all the members are the same.

There are a multitude of ways to do step number one. The simplest way (definitely not the best way, but the easiest) would be something like this:

var myNumbers = [];
myNumbers.push(document.getElementById('firstInput'));
myNumbers.push(document.getElementById('secondInput'));
myNumbers.push(document.getElementById('thirdInput'));
myNumbers.push(document.getElementById('fourthInput'));

Then to compare, put the "correct" numbers into an array as well, sort them and then compare each member:

var correctNumbers = [5,3,7,1];
correctNumbers.sort();
myNumbers.sort();

for (var i = 0, l = correctNumbers; i < l; ++i) {
    if (correctNumbers[i] != myNumbers[i]) {
        // they don't match!
    }
}
// if you get to here and haven't found any discrepancies,
// then the two arrays match.

nickf 2009-08-08 15:55:39

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Compare multiple numbers for lotto check form

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