So I am currently in my final stages of finishing a webapp in React. In this stage I am looking for performance issues and I am trying to optimize the performance. So I have 3 components: RulePage, RuleList (Contains a…
what does means ref=const,const in mysql explain statment? i add index for the table and the index contains tow columns where statment contains two index columns and some not in index columns why does the explain statment extra column show…
$department_id = Employee::select('user_id') ->where('department_id', request()->dept_id) ->where('role',2) ->get() ->toArray(); $users = Employee::whereIn('user_id', $department_id) ->get(); actually i have tried where function but didn't get desired output.
I'm scratching my head on this one. The below essentially times out on both my local machine and AWS. Here's the kicker, each subquery runs fine. The first subquery takes 55ms and returns 24000 records. The second takes 42ms and…
I have the following queries in my controller to show some statistics about orders paid, and unpaid and the respective amounts (totals), by year. Yet, I feel that the queries I'm using may be optimized but I can't figure out…
Question I am trying to animate a UIView color from light grey to dark grey and a UIButton title color from blue to orange. The animation is meant to take place over 3 seconds when the UIButton is tapped. The…
I recently wrote this function for deep cloning an object in javascript, but with the given time complexity it would be extremely slow, any tips on making it more effecient? function deepClone(obj){ let clone = {}; for (let k in…
In javascript, I want to have a function with this declaration: function sumOfTwoItemExist(arr:number[],total:number)=>boolean the first parameter would be an array of numbers and the 2nd would be a number, now I want to return true if the sum of any…
I have an item dataframe such as: item_dict = { 'index': [18, 24, 25, 26, 30, 31, 37, 38, 61, 62, 63, 67, 68, 69], 'BarCode_x': ['12345678ABCD', '12345678IJKL', '12345678IJKL', '12345678IJKL', '12345678EFGH', '12345678EFGH', '67890123IJKL', '67890123IJKL', '67890123ABCD', '67890123ABCD', '67890123ABCD', '67890123EFGH', '67890123EFGH', '67890123EFGH'],…
I have a table in my database with many (10+) int4 columns, and I am also developing an application server which updates these values. My current approach requires multiple round trips, because I do something like this, each as a…