@uiw/react-native/lib/utils/utils.js

UIW for React Native

export function arrayTreeFilter(data, filterFn, options) {
    options = options || {};
    options.childrenKeyName = options.childrenKeyName || 'children';
    var children = data || [];
    var result = [];
    var level = 0;
    do {
        var foundItem = children.filter(function (item) {
            return filterFn(item, level);
        })[0];
        if (!foundItem) {
            break;
        }
        result.push(foundItem);
        children = foundItem[options.childrenKeyName] || [];
        level += 1;
    } while (children.length > 0);
    return result;
}
/**
 * 判断元素是否在数组最后一位
 * @param length 数组长度
 * @param i 循环下标
 * @returns
 */
export const last = (length, i) => length - 1 === i;
/**移动数据*/
export const move = (dataArray, moveIndex, toIndex) => {
    const { length } = dataArray;
    if (moveIndex < 0 || moveIndex >= length || toIndex < 0 || toIndex >= length) {
        return dataArray;
    }
    const item = dataArray[moveIndex];
    const diff = moveIndex - toIndex;
    if (diff > 0) {
        return [
            ...dataArray.slice(0, toIndex),
            item,
            ...dataArray.slice(toIndex, moveIndex),
            ...dataArray.slice(moveIndex + 1, length),
        ];
    }
    if (diff < 0) {
        return [
            ...dataArray.slice(0, moveIndex),
            ...dataArray.slice(moveIndex + 1, toIndex + 1),
            item,
            ...dataArray.slice(toIndex + 1, length),
        ];
    }
    return dataArray;
};