Find Index
- javascript
- typescript
- arrays
Problem URL:Find Index
My Solution
TypeScript
const findIndex = <T>(
array: Array<T>,
predicate: (value: T, index: number, array: Array<T>) => boolean,
fromIndex = 0
): number => {
let startFrom =
fromIndex < 0
? fromIndex < -array.length
? 0
: array.length + fromIndex
: fromIndex;
for (let i = startFrom; i < array.length; i++) {
if (predicate(array[i], i, array)) {
return i;
}
}
return -1;
};
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