WebApr 21, 2024 · The firstOrNew method is really useful for finding the first Model that matches some constraints or making a new one if there isn’t one that matches those constraints. You can take a piece of code that looks like this: $user = User::where('email', request('email'))->first(); if ($user === null) { $user = new User( ['email' => request('email')]); } Webval str = "kotlin very good"// 如果未查找到满足条件的元素，会抛出NoSuchElementException异常 str.first{ it == 'o' } // 如果未查找到满足条件的元素，会返回nullstr.firstOrNull { it == 'o' } 1.2、 获取最后一个元素. 主要包含first()、firstOrNull()和first{}和firstOrNull{}四个函数. last()和 ...
Enumerable.FirstOrDefault Method (System.Linq) Microsoft Learn
WebThe firstOrNull() method can be used in two ways. To get the first element of the ArrayList. If the ArrayList is empty, then null is returned. To get the first element of the ArrayList that … WebAs you can see we added checking if the returned is null. Then call abort () function. Laravel Eloquent firstOrFail () basic example But using the code example below our code will be shortened if you need to abort the process if no record is found using firstOrFail () method in Laravel eloquent. how to manage child account microsoft
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WebFeb 16, 2024 · SQL concatenation is the process of combining two or more character strings, columns, or expressions into a single string. For example, the concatenation of … Web1 day ago · For almost 10 minutes Wednesday afternoon, Harper stood on the grass with Dombrowski and the two had an animated conversation. The day before, Harper went to … WebSep 11, 2010 · FirstOrNull (this IEnumerable sequence, Func predicate) where T : struct { foreach (T item in sequence.Where (predicate)) return item; return null; … how to manage checking and savings accounts