Using Transactions or SaveChanges(false) and AcceptAllChanges()?
I have been investigating transactions and it appears that they take care of themselves in EF as long as I pass `false` to `SaveChanges()` and then call `AcceptAllChanges()` if there are no errors: `...
- Modified
- 20 Mar at 11:20
How can I check whether a string variable is empty or null in C#?
How can I check whether a C# variable is an empty string `""` or null? I am looking for the simplest way to do this check. I have a variable that can be equal to `""` or null. Is there a single functi...
- Modified
- 23 Nov at 23:19
Java associative-array
How can I create and fetch associative arrays in Java like I can in PHP? For example: ``` $arr[0]['name'] = 'demo'; $arr[0]['fname'] = 'fdemo'; $arr[1]['name'] = 'test'; $arr[1]['fname'] = 'fname'; ...
- Modified
- 3 Jul at 11:28
How to convert Set<String> to String[]?
I need to get a `String[]` out of a `Set<String>`, but I don't know how to do it. The following fails: ``` Map<String, ?> myMap = gpxlist.getAll(); Set<String> myset = myMap.keySet(); String[] GPXFIL...
- Modified
- 12 May at 18:45
Deleting multiple elements from a list
Is it possible to delete multiple elements from a list at the same time? If I want to delete elements at index 0 and 2, and try something like `del somelist[0]`, followed by `del somelist[2]`, the sec...
How to display the first few characters of a string in Python?
I just started learning Python but I'm sort of stuck right now. I have `hash.txt` file containing thousands of malware hashes in MD5, Sha1 and Sha5 respectively separated by delimiters in each line. B...
- Modified
- 16 Dec at 02:1
How can I change the default Django date template format?
I have dates in ISO 8601 format in the database, `%Y-%m-%d`. However, when the date is passed on to the template, it comes out as something like `Oct. 16, 2011`. Is there a way that I can manipulate ...
- Modified
- 31 Jan at 14:44
Using stored procedure output parameters in C#
I am having a problem returning an output parameter from a Sql Server stored procedure into a C# variable. I have read the other posts concerning this, not only here but on other sites, and I cannot g...
- Modified
- 25 Apr at 19:35
How to know if two arrays have the same values
I have these two arrays: one is filled with information from an ajax request and another stores the buttons the user clicks on. I use this code (I filled with sample numbers): ``` var array1 = [2, 4]...
- Modified
- 7 Mar at 16:27
Finding the average of an array using JS
I've been looking and haven't found a simple question and answer on stack overflow looking into finding the average of an array. This is the array that I have ``` const grades = [80, 77, 88, 95, 68]; ...
- Modified
- 17 Jul at 04:39
Automatically run a program on startup under Linux Ubuntu
I'd need a program to be run every time I start up my Ubuntu Linux. So I'd need to add it to my startup programs list. Just one problem: I'd need to do it via the terminal.
scipy.misc module has no attribute imread?
I am trying to read an image with scipy. However it does not accept the `scipy.misc.imread` part. What could be the cause of this? ``` >>> import scipy >>> scipy.misc <module 'scipy.misc' from 'C:\Py...
- Modified
- 8 Jun at 23:51
Is there a way to purge the topic in Kafka?
I pushed a message that was too big into a kafka message topic on my local machine, now I'm getting an error: ``` kafka.common.InvalidMessageSizeException: invalid message size ``` Increasing the `fe...
- Modified
- 15 Jun at 14:45
Stopping Excel Macro executution when pressing Esc won't work
I'm running excel 2007 on XP. Is there a way to stop a macro from running during its execution other than pressing escape? Usually if I think I created an infinate loop or otherwise messed something...
How to calculate mean, median, mode and range from a set of numbers
Are there any functions (as part of a math library) which will calculate [mean](http://www.cimt.plymouth.ac.uk/projects/mepres/book8/bk8i5/bk8_5i2.htm), median, mode and range from a set of numbers. ...
- Modified
- 16 Nov at 06:26
Java switch statement: Constant expression required, but it IS constant
So, I am working on this class that has a few static constants: ``` public abstract class Foo { ... public static final int BAR; public static final int BAZ; public static final int B...
- Modified
- 30 Sep at 03:2
Visual studio code cmd error: Cannot be loaded because running scripts is disabled on this system
Inside of visual studio code, I'm trying to execute a script.bat from the command line, but I'm getting the following error: > File C:\Theses_Repo\train-cnn\environment\Scripts\activate.ps1 cannot be...
- Modified
- 18 May at 12:51
Check if value exists in dataTable?
I have DataTable with two columns and . I want to check if the given string value already exists in the DataTable. Is there some built in method to check it, like for Arrays `array.contains`?
Best HTTP Authorization header type for JWT
I'm wondering what is the best appropriate `Authorization` HTTP header type for [JWT tokens](http://jwt.io/). One of the probably most popular type is `Basic`. For instance: ``` Authorization: Basic...
- Modified
- 21 Oct at 17:55
Auto reloading python Flask app upon code changes
I'm investigating how to develop a decent web app with Python. Since I don't want some high-order structures to get in my way, my choice fell on the lightweight [Flask framework](https://flask.pallets...
How can I display a tooltip message on hover using jQuery?
As the title states, how can I display a tooltip message on hover using jQuery?
- Modified
- 23 Nov at 16:18
RegExp matching string not starting with my
For PMD I'd like to have a rule which warns me of those ugly variables which start with `my`. This means I have to accept all variables which do start with `my`. So, I need a RegEx (re) which behaves...
- Modified
- 23 Jun at 07:15
How to test if a string contains one of the substrings in a list, in pandas?
Is there any function that would be the equivalent of a combination of `df.isin()` and `df[col].str.contains()`? For example, say I have the series `s = pd.Series(['cat','hat','dog','fog','pet'])`, ...
URL rewriting with PHP
I have a URL that looks like: ``` url.com/picture.php?id=51 ``` How would I go about converting that URL to: ``` picture.php/Some-text-goes-here/51 ``` I think WordPress does the same. How do I...
- Modified
- 2 Aug at 23:11