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| function findInArray(items, value, predicate) { | |
| predicate = predicate || contains; | |
| var min = 0; | |
| var max = items.length - 1; | |
| var mid = Math.floor(items.length / 2); | |
| var foundIndex = false; | |
| while (foundIndex === false) { | |
| if (predicate(items, value, min, mid)) { | |
| foundIndex = items[min] === value ? min : items[mid] === value ? mid : false; | |
| max = mid; | |
| mid = Math.floor(mid / 2); | |
| } | |
| else if (predicate(items, value, mid, max)) { | |
| foundIndex = items[mid] === value ? mid : items[max] === value ? max : false; | |
| min = mid; | |
| mid = Math.floor((max - min) / 2) + mid; | |
| } | |
| else { | |
| return; | |
| } | |
| } | |
| return foundIndex; | |
| }; | |
| function contains(items, value, min, max) { | |
| return value >= items[min] && value <= items[max]; | |
| } |
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