zent/es/utils/findIndex.js

一套前端设计语言和基于React的实现

import isNil from './isNil';
export default function findIndex(array, predicate, fromIndex) {
    if (isNil(array)) {
        return -1;
    }
    if (fromIndex === undefined || fromIndex < 0) {
        fromIndex = 0;
    }
    else if (fromIndex > array.length - 1) {
        fromIndex = array.length - 1;
    }
    for (var i = fromIndex; i < array.length; i++) {
        if (predicate(array[i], i, array)) {
            return i;
        }
    }
    return -1;
}