Questions

JavaScript: Alert.Show(message) From ASP.NET Code-behind

I am reading this [JavaScript: Alert.Show(message) From ASP.NET Code-behind](http://archive.devnewz.com/devnewz-3-20061129JavaScriptAlertShowmessagefromASPNETCodebehind.html) I am trying to implement...

27 Aug at 01:44

ExpressionChangedAfterItHasBeenCheckedError Explained

Please explain to me why I keep getting this error: `ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked.` Obviously, I only get it in dev mode, it doesn't happen...

How to terminate a python subprocess launched with shell=True

I'm launching a subprocess with the following command: ``` p = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True) ``` However, when I try to kill using: ``` p.terminate() ``` or ``` p.k...

21 Oct at 12:48

Select first 4 rows of a data.frame in R

How can I select the first 4 rows of a `data.frame`: ``` Weight Response 1 Control 59 0.0 2 Treatment 90 0.8 3 Treatment 47 0.1 4 Treamment 106 0.1 5 Control ...

19 Jan at 01:29

How do I get a UTC Timestamp in JavaScript?

While writing a web application, it makes sense to store (server side) datetimes in the DB as UTC timestamps. I was astonished when I noticed that you couldn't natively do much in terms of Timezone ...

30 Aug at 18:59

How do you allow spaces to be entered using scanf?

Using the following code: ``` char *name = malloc(sizeof(char) + 256); printf("What is your name? "); scanf("%s", name); printf("Hello %s. Nice to meet you.\n", name); ``` A user can enter their...

17 Jun at 16:39

What is a callback function?

What is a callback function?

5 May at 16:14

How to correctly set the ORACLE_HOME variable on Ubuntu 9.x?

I have the same problem as listed here: [How to recover or change Oracle sysdba password](https://stackoverflow.com/questions/52239/oracle-lost-sysdba-password) although I did not lose the password, I...

23 May at 12:2

Why is it important to override GetHashCode when Equals method is overridden?

Given the following class ``` public class Foo { public int FooId { get; set; } public string FooName { get; set; } public override bool Equals(object obj) { Foo fooItem = ob...

4 Jul at 15:37

Cannot set content-type to 'application/json' in jQuery.ajax

When I have this code ``` $.ajax({ type: 'POST', //contentType: "application/json", url: 'http://localhost:16329/Hello', data: { name: 'norm' }, dataType: 'json' }); ``` in Fidd...

23 Dec at 18:55

How to put a Scanner input into an array... for example a couple of numbers

``` Scanner scan = new Scanner(System.in); double numbers = scan.nextDouble(); double[] avg =..???? ```

10 Jul at 00:12

SQL LEFT JOIN Subquery Alias

I'm running this SQL query: ``` SELECT wp_woocommerce_order_items.order_id As No_Commande FROM wp_woocommerce_order_items LEFT JOIN ( SELECT meta_value As Prenom FROM wp_postmet...

19 Dec at 15:30

Can a Byte[] Array be written to a file in C#?

I'm trying to write out a `Byte[]` array representing a complete file to a file. The original file from the client is sent via TCP and then received by a server. The received stream is read to a byt...

19 Dec at 16:57

how do you increase the height of an html textbox

How do you increase the height of an textbox? (along with its font size)

20 Jul at 10:47

Get list of filenames in folder with Javascript

My website is serving a lot of pictures from `/assets/photos/` folder. How can I get a list of the files in that folder with Javascript?

7 Jul at 16:27

Two versions of python on linux. how to make 2.7 the default

I've got two versions of python on my linuxbox: ``` $python Python 2.6.6 (r266:84292, Jul 10 2013, 22:48:45) [GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2 Type "help", "copyright", "credits" or "...

8 Oct at 19:4

Show distinct column values in pyspark dataframe

With pyspark dataframe, how do you do the equivalent of Pandas `df['col'].unique()`. I want to list out all the unique values in a pyspark dataframe column. Not the SQL type way (registertemplate then...

Disable vertical scroll bar on div overflow: auto

Is it possible to allow only a horizontal scroll bar when using overflow:auto (or scroll)?

26 Feb at 11:40

How Do I Uninstall Yarn

How can I uninstall yarn? I've used it for a react-native project and now whenever I move the code out of `index.ios.js` or `index.android.js` it throws an error so I'd like to just use npm but whenev...

20 Feb at 20:5

Running a Python script from PHP

I'm trying to run a Python script from PHP using the following command: `exec('/usr/bin/python2.7 /srv/http/assets/py/switch.py arg1 arg2');` However, PHP simply doesn't produce any output. Error re...

23 Sep at 14:46

What is an ORM, how does it work, and how should I use one?

Someone suggested I use an ORM for a project that I'm designing, but I'm having trouble finding information on what it is or how it works. Can anyone give me a brief explanation of what an ORM is an...

11 Jun at 16:31

Completely cancel a rebase

I performed a rebase like this: ``` git rebase --onto master new_background_processing export_background_processing ``` That didn't do what I wanted it to, so I performed a reset: ``` git reset ...

20 Dec at 02:43

Hibernate throws MultipleBagFetchException - cannot simultaneously fetch multiple bags

Hibernate throws this exception during SessionFactory creation: > org.hibernate.loader.MultipleBagFetchException: cannot simultaneously fetch multiple bags This is my test case: ``` @Entity publi...

29 Apr at 16:42

How to wait for 2 seconds?

How does one cause a delay in execution for a specified number of seconds? This doesn't do it: ``` WAITFOR DELAY '00:02'; ``` What is the correct format?

25 Apr at 15:37

.NET / C# - Convert char[] to string

What is the proper way to turn a `char[]` into a string? The `ToString()` method from an array of characters doesn't do the trick.

17 Jul at 15:39