ut2/es/internals/createIteratee.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

import identity from '../identity.js';
import isSymbol from '../isSymbol.js';

function createIteratee(iteratee) {
    if (typeof iteratee === 'function') {
        return iteratee;
    }
    if (typeof iteratee === 'string' || typeof iteratee === 'number' || isSymbol(iteratee)) {
        return function (value) { return value[iteratee]; };
    }
    return identity;
}

export { createIteratee as default };