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Laravel 8 splice() {#collection-method}

2021-07-01 15:42:07 更新

splice 方法移除并返回指定索引开始的元素片段:

$collection = collect([1, 2, 3, 4, 5]);

$chunk = $collection->splice(2);

$chunk->all();

// [3, 4, 5]

$collection->all();

// [1, 2]

你可以传递第二个参数用以限制被删除内容的大小:

$collection = collect([1, 2, 3, 4, 5]);

$chunk = $collection->splice(2, 1);

$chunk->all();

// [3]

$collection->all();

// [1, 2, 4, 5]

此外,你可以传入含有新参数项的第三个参数来代替集合中删除的元素:

$collection = collect([1, 2, 3, 4, 5]);

$chunk = $collection->splice(2, 1, [10, 11]);

$chunk->all();

// [3]

$collection->all();

// [1, 2, 10, 11, 4, 5]