Collection 笔记
where
collect($session)->where('is_valid',1)->count();
collect($temp)->where('phone','!=','')->count();
pluck
$temp = collect($session)->pluck('student'));
each
collect($temp)->each(function ($item){\
if(true){
}
return false;
});
avg
collect($session)->pluck('avg_response_time')->avg() ?? 0
reject
//抛弃23 返回[1,4,5]
collect([1,23,4,5])->reject(function($item){ return $item == 23;});
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