iteragain/dist/esm/findIndex.js

Javascript Iterable/Iterator/Generator-function utilities.

import toIterator from './toIterator';
export function findIndex(...args) {
    if (args.length === 1)
        return it => findIndex(it, args[0]);
    const it = toIterator(args[0]);
    const predicate = args[1];
    let next;
    let i = -1;
    while ((i++, !(next = it.next()).done))
        if (predicate(next.value))
            return i;
    return -1;
}
export default findIndex;
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