如何使用休息或继续使用Laravel Eloquent Collection的每种方法？

Question

如何使用休息或继续使用Laravel Eloquent Collection的每种方法.我的代码是这样的:

$objectives->each(function($objective) {
        Collection::make($objective)->each(function($action) {
            Collection::make($action)->each(function($success_indicator) {
                Collection::make($success_indicator)->each(function($success_indicator) {
                    echo 'hi';
                    continue;
                });
            });
        });
    });

Answer 1

我们可以返回真/假 true的continue,false对break

继续:

collect([1,2,3,4])->each(function ($item){
            if ($item === 2) {
                return true;
            }
            echo $item;
});

输出: 1 3 4

打破:

collect([1,2,3,4])->each(function ($item){
            if ($item === 2) {
                return false;
            }
            echo $item;
});

输出: 1

Answer 2

要continue,只要return了内部的功能.要break,以及..

如果你使用的是Laravel 5.1+,你可以返回false打破循环:

$objectives->each(function($objective) {
    collect($objective)->each(function($action) {
        collect($action)->each(function($success_indicator) {
            collect($success_indicator)->each(function($success_indicator) {
                if ($condition) return false;
            });
        });
    });
});

对于旧版本的Laravel,请使用常规foreach循环:

$objectives->each(function($objective) {
    foreach ($objective as $action) {
        foreach ($action as $success_indicators) {
            foreach ($success_indicators as $success_indicator) {
                echo 'hi';
                break;
            }
        }
    }
});