Returns true if any two numbers in given array add up to given integer. This was a "live" coding question I was given in an interview.

sumTwoMatch.js

/**
 * Returns true if any two numbers in list add up to num
 */
function sumTwoMatch(list, num) {
    var i = 0,
        match = false,
        list2;

    for (; i < list.length; i++) {
        list2 = list.slice();
        list2.splice(i, 1);
        match = list2.some(function(val) {
            return (list[i] + val === num);
        });
        if (match) {
            return true;
        }
    }
    return false;
}
// Tests
console.log(
    sumTwoMatch([1, 5, 3, 4, 5], 10), // true
    sumTwoMatch([1, 5, 3, 4, 5], 11), // false
    sumTwoMatch([1, 5, 3, 4, 5], 8),  // true
    sumTwoMatch([1, 5, 3, 4, 5], 3),  // false
    sumTwoMatch([1, 5, 3, 4, 5], 5),  // true
    sumTwoMatch([1, 5, 3, 4, 5], 3),  // false
    sumTwoMatch([1, 5, 3, 4, 5], 9),  // true
    sumTwoMatch([1, 5, 3, 4, 5], 2)   // false
);