Hello,
I'm wondering if there's a way to do array intersections that I
haven't found yet.
I've been trying to use Array.without() for this, but it can't compare
one Array to another. Is there a way to convert an Array to a list of
parameters for a function call (which is what Array.without() is
expecting) without resorting to eval() trickery?
<html>
<head>
<script type="text/javascript" src="prototype.js"></script>
<script type="text/javascript">
function runTest() {
var results = $('results');
var numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9];
var even = [2, 4, 6, 8];
var odd = numbers.without(even);
results.innerHTML += 'numbers: ' + numbers.inspect() + '<br/>';
results.innerHTML += 'even: ' + even.inspect() + '<br/>';
results.innerHTML += 'odd: ' + odd.inspect() + '<br/>';
}
</script>
</head>
<body>
<div id="results"></div>
<button onclick="runTest()">Run Test</button>
</body>
</html>
I can get the behavior I want if I override Array.without() like:
Array.prototype.without = function() {
var values = $A(arguments).flatten();
return this.select(function(value) {
return !values.include(value);
});
}
but, I'd really prefer not to have to do that.
Thanks,
Todd
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