lib/internal/createTester.js


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import noop from './noop';
import breakLoop from './breakLoop';

export default function _createTester(check, getResult) {
    return function(eachfn, arr, iteratee, cb) {
        cb = cb || noop;
        var testPassed = false;
        var testResult;
        eachfn(arr, function(value, _, callback) {
            iteratee(value, function(err, result) {
                if (err) {
                    callback(err);
                } else if (check(result) && !testResult) {
                    testPassed = true;
                    testResult = getResult(true, value);
                    callback(null, breakLoop);
                } else {
                    callback();
                }
            });
        }, function(err) {
            if (err) {
                cb(err);
            } else {
                cb(null, testPassed ? testResult : getResult(false));
            }
        });
    };
}