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add Ox.nextValue

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rlx 2013-07-18 12:52:47 +00:00
parent a4ab0c1eb3
commit c4d2bb7a3d
1 changed files with 29 additions and 0 deletions
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source/Ox/js/Array.js
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@ -568,6 +568,35 @@ Ox.makeArray = function(value) {
return ret;
};
/*@
Ox.nextValue <f> Next value, given an array of numbers, a number and a direction
(array, value, direction) -> <n> Next value
array <[n]> Sorted array of numbers
value <n> Number
direction <n|1> Direction (-1 for left or 1 for right)
> Ox.nextValue([0, 2, 4, 6, 8], 5, -1)
4
> Ox.nextValue([], 1, 1)
void 0
@*/
Ox.nextValue = function(array, value, direction) {
var found = false, nextValue;
direction = direction || 1;
direction == -1 && array.reverse();
Ox.forEach(array, function(v) {
if (direction == 1 ? v > value : v < value) {
nextValue = v;
found = true;
return false; // break
}
});
direction == -1 && array.reverse();
if (!found) {
nextValue = array[direction == 1 ? 0 : array.length - 1];
}
return nextValue;
};
/*@
Ox.range <f> Python-style range
(stop) -> <[n]> range