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Apple User Help

macOS 10.15.5 update not installed despite 30gb disk space

I have 30gb of free disk space on 250gb disk which should be more than enough I cannot install 10.15.5 it just restart and still says I haven’t installed Update Just now it wasn’t showing the purgeable but now it is after my successful update.

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CMS Drupal Mastering Development

Auuopopulate a content type with user information

I have a custom content type. I have created users using Add users. I need to create a page with a search box for the username. After selecting the username, I need to be directed to the content type with user data auto-populated. The user data is already added with Add user. How do I […]

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Ask Engineering

Where to connect GND on keyboard multiplexer circuit?

Hi all, I’m making a project to read my old calculator’s keyboard with an arduino and I’ve decided to design a new PCB and change it with the original one, as it’s easier than trying to hook into the old circuit. I’m working in EasyEDA and it’s nearly done, but I’m confused about how and […]

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Ask Engineering

When does a transistor act as a switch, and when as an amplifier?

I’m a beginner with electronics, anyway I’m experimenting a lot with it. I still don’t understand how you can use the same transistor for example to amplify an audio signal, or to act as a switch for turning on and off the current of a motor. Do you use different types of transistor for different […]

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Database Development

Question response time on StackOverflow

I thought that this was fun to share. I was wondering when should I give up all hope that my question would ever be answered and begin to start crying. So, I wrote a query for the StackOverflow DB that would give me that answer (in general). It calculates how many and what percentage of […]

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Database Development

What value to set for MAX and MIN memory of SQL Server hosted on Bare Metal

Within AWS, Many of our Database servers are being migrated from EC2 Instance to Bare Metal. (Correct me, If I am wrong) In Bare metal, there are two memory limits available for the VM hosted on Bare metal. Current total memory that is assigned to the VM hosted on Bare metal. (105 as per below […]

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Game Creation Mastering Development

Can I set the unity camera to have the same position in a real world?

I have a problem about setting the camera in the unity to have the same extrinsic parameters as my real world camera to the origin. So let’s me describe my problem step by step. I have a camera in a real world and Its extrinsic to an aruco plane was calculated. So I use the […]

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Database Development

Why is it important for every table to have a primary key?

So I have some tables in Sql Server that are essentially a list of sales, things like: ProductID SalesOrderID ProductFamilyID ProductCost ProductSource and so on. In this case, none of the columns are necessarily unique, so I can’t create a primary key from any combination of them. In fact, the only constraint that I really […]

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Database Development

MySQL: change column type using expression

In a MySQL database, I need to convert some UUID columns (BINARY(16)) into VARCHAR. I want to convert them in the canonical form, not as bytes. For clarity, in lowercase and with hyphens, and not in the 0xHEXADECIMAL format. In Postgres, this is enough: ALTER TABLE my_table ALTER COLUMN my_uuid_column TYPE VARCHAR(36); The MySQL equivalent […]

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Database Development

DBCC CHECKTABLE – 2570 error

Running DBCC Checktable on one of my tables causes several errors: Msg 2570, Level 16, State 3, Line 1 errors, Page (1:442), slot 1 in object ID 565577053, index ID 0, partition ID 72057594041270272, alloc unit ID 72057594046906368 (type “In-row data”). Column “XXXX” value is out of range for data type “decimal”. Update column to […]