Questions

How to convert a hex string to hex number

I want to convert a hex string (ex: `0xAD4`) to hex number, then to add `0x200` to that number and again want to print that number in form of `0x` as a string. i tried for the first step: ``` str(in...

19 Feb at 12:55

MySQL: NOT LIKE

I have these text in my db, ``` categories_posts categories_news posts_add news_add ``` And I don't want to select the rows with `categories`, I use a query something like this, ``` SELECT * F...

11 Apr at 07:28

Spring MVC - How to get all request params in a map in Spring controller?

Sample URL: ``` ../search/?attr1=value1&attr2=value2&attr4=value4 ``` I do not know the names of attr1, att2, and attr4. I would like to be able to do something like that (or similar, don't care, ...

6 Dec at 13:39

Regex match any single character (one character only)

How do you match any one character with a regular expression? A number of other questions on Stack Overflow sound like they promise a quick answer, but they are actually asking something more specific...

2 Jul at 13:20

how to pass parameter from @Url.Action to controller function

I have a function `CreatePerson(int id)` , I want to pass `id` from `@Url.Action`. Below is the reference code: ``` public ActionResult CreatePerson(int id) //controller window.location.href = "@U...

7 Nov at 11:51

How does GPS in a mobile phone work exactly?

I assume it doesn't connect to anything (other than the satelite I guess), is this right? Or it does and has some kind of charge?

7 Oct at 22:16

IF EXIST C:\directory\ goto a else goto b problems windows XP batch files

whenever i run the `code` below it occurs to me I have made a mistake using the if exist lines, as no matter whether the directory exists or not, it acts as if the line was never there... either that ...

15 Nov at 05:45

What are the differences between a clustered and a non-clustered index?

What are the differences between a `clustered` and a `non-clustered index`?

Typing Greek letters etc. in plots

I need to type Greek letters and the Angstrom symbol in labels of axes in a plot. So for example ``` fig.gca().set_xlabel("$wavelength\, (Angstrom)$") fig.gca().set_ylabel("$lambda$") ``` except th...

19 Mar at 20:4

matplotlib error - no module named tkinter

I tried to use the matplotlib package via Pycharm IDE on windows 10. when I run this code: ``` from matplotlib import pyplot ``` I get the following error: ``` ImportError: No module named 'tkinte...

18 Jun at 16:49

MySQL fails on: mysql "ERROR 1524 (HY000): Plugin 'auth_socket' is not loaded"

My local environment is: - - - with installed MySQL 5.7``` sudo apt-get install mysql-common mysql-server ``` --- When I tried to login to MySQL (via CLI): ``` mysql -u root -p ``` I came ac...

17 Jun at 10:36

Simple dictionary in C++

Moving some code from Python to C++. ``` BASEPAIRS = { "T": "A", "A": "T", "G": "C", "C": "G" } ``` Thinking maps might be overkill? What would you use?

1 Mar at 05:57

Start / Stop a Windows Service from a non-Administrator user account

I have a WindowsService named, say, BST. And I need to give a non-Administrator user, UserA, the permissions to Start/Stop this particular service. My service runs on a variety of Windows OS, starting...

How do I create a Bash alias?

I'm on OSX and I need to put something like this, `alias blah="/usr/bin/blah"` in a config file but I don't know where the config file is.

16 Jan at 08:24

PHP mailer multiple address

> [PHPMailer AddAddress()](https://stackoverflow.com/questions/1770765/phpmailer-addaddress) Here is my code. if value is only 1. It will send. But multiple don't send. What should I do for this....

21 Jun at 10:54

Can’t delete docker image with dependent child images

I am trying ``` docker rmi c565603bc87f ``` Error: > Error response from daemon: conflict: unable to delete c565603bc87f (cannot be forced) - image has dependent child images So i can't delete ...

6 Mar at 20:48

How to change Navigation Bar color in iOS 7?

How do I change the Navigation Bar color in iOS 7? Basically I want to achieve something like the Twitter Nav Bar (updated Twitter for `iOS7` that is). I embedded-in a nav bar atop a `view controller...

How to start a Process as administrator mode in C#

I have a Visual Studio Windows app project. I've added code to download an installer update file. The installer after it has finished downloading would need administrator privileges to run. I have add...

28 Mar at 12:17

What is a callback?

What's a callback and how is it implemented in C#?

26 Jan at 14:0

Docker (Apple Silicon/M1 Preview) MySQL "no matching manifest for linux/arm64/v8 in the manifest list entries"

I'm running the latest build of the [Docker Apple Silicon Preview.](https://www.docker.com/blog/download-and-try-the-tech-preview-of-docker-desktop-for-m1/) I created the tutorial container/images and...

26 Dec at 13:20

PHP check whether property exists in object or class

I understand PHP does not have a pure object variable, but I want to check whether a property is in the given object or class. ``` $ob = (object) array('a' => 1, 'b' => 12); ``` or ``` $ob = new stdC...

16 May at 18:44

Validate email address textbox using JavaScript

I have a requirement to validate an email address entered when a user comes out from the textbox. I have googled for this but I got form validation JScript; I don't want form validation. I want textb...

14 Dec at 09:31

How to create a foreign key in phpmyadmin

I want to make doctorid a foreign key in my patient table. So I have all of my tables created - the main problem is that when I go to the table > structure > relation view only the primary key comes ...

3 Jun at 13:22

"Invalid JSON primitive" in Ajax processing

I am getting an error in an ajax call from jQuery. Here is my jQuery function: ``` function DeleteItem(RecordId, UId, XmlName, ItemType, UserProfileId) { var obj = { RecordId: RecordId, ...

7 Aug at 17:13

View a specific Git commit

> [Get Information about a SHA-1 commit object?](https://stackoverflow.com/questions/7610073/get-information-about-a-sha-1-commit-object) I needed to check when a specific change was added to ...

23 May at 12:18