Open file dialog and select a file using WPF controls and C#
I have a `TextBox` named `textbox1` and a `Button` named `button1`. When I click on `button1` I want to browse my files to search only for image files (type jpg, png, bmp...). And when I select an ima...
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- 13 Feb at 14:59
How to implement the Java comparable interface?
I am not sure how to implement a comparable interface into my abstract class. I have the following example code that I am using to try and get my head around it: ``` public class Animal{ public ...
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- 7 Jan at 11:21
Difference between int32, int, int32_t, int8 and int8_t
I came across the data type `int32_t` in a C program recently. I know that it stores 32 bits, but don't `int` and `int32` do the same? Also, I want to use `char` in a program. Can I use `int8_t` in...
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- 25 Jan at 05:59
"Unresolved inclusion" error with Eclipse CDT for C standard library headers
I set up CDT for eclipse and wrote a simple hello world C program: ``` #include <stdio.h> int main(void){ puts("Hello, world."); return 0; } ``` The program builds and runs correctly, but ec...
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- 13 Feb at 18:7
Show percent % instead of counts in charts of categorical variables
I'm plotting a categorical variable and instead of showing the counts for each category value. I'm looking for a way to get `ggplot` to display the percentage of values in that category. Of course, i...
How to specify preference of library path?
I'm compiling a c++ program using `g++` and `ld`. I have a `.so` library I want to be used during linking. However, a library of the same name exists in `/usr/local/lib`, and `ld` is choosing that lib...
What does ==$0 (double equals dollar zero) mean in Chrome Developer Tools?
In Google Chrome's developer tools, when I select an element, I see `==$0` next to the selected element. What does that mean? [](https://i.stack.imgur.com/C2eGI.jpg)
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- 2 Sep at 18:3
Textarea onchange detection
How do I detect change event on textarea using javascript? I'm trying to detect how many characters left is available as you type. I tried using the onchange event, but that seems to only kick in whe...
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- 29 Jun at 04:18
VBA Macro On Timer style to run code every set number of seconds, i.e. 120 seconds
I have a need to run a piece of code every 120 seconds. I am looking for an easy way to do this in VBA. I know that it would be possible to get the timer value from the `Auto_Open` event to prevent ...
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- 23 May at 12:2
Running vbscript from batch file
I just need to write a simple batch file just to run a vbscript. Both the vbscript and the batch file are in the same folder and is in the SysWOW64 directory as the vbscript can only be execute in tha...
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- 12 Jun at 02:17
Single vs double quotes in JSON
My code: ``` import simplejson as json s = "{'username':'dfdsfdsf'}" #1 #s = '{"username":"dfdsfdsf"}' #2 j = json.loads(s) ``` `#1` definition is wrong `#2` definition is right I heard that in ...
Should I use SVN or Git?
I am starting a new distributed project. Should I use SVN or Git, and why?
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- 10 Apr at 23:34
Method call if not null in C#
Is it possible to somehow shorten this statement? ``` if (obj != null) obj.SomeMethod(); ``` because I happen to write this a lot and it gets pretty annoying. The only thing I can think of is t...
Selecting a row in DataGridView programmatically
How can I select a particular range of rows in a `DataGridView` programmatically at runtime?
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- 29 May at 01:50
how to filter out a null value from spark dataframe
I created a dataframe in spark with the following schema: ``` root |-- user_id: long (nullable = false) |-- event_id: long (nullable = false) |-- invited: integer (nullable = false) |-- day_diff:...
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- 15 Sep at 10:7
Cypress: Test if element does not exist
I want to be able to click on a check box and test that an element is no longer in the DOM in Cypress. Can someone suggest how you do it? ``` // This is the Test when the checkbox is clicked and the e...
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- 16 Dec at 00:12
Vue.js data-bind style backgroundImage not working
I'm trying to bind the src of an image in an element, but it doesn't seem to work. I'm getting an "Invalid expression. Generated function body: { backgroundImage:{ url(image) }". The [documentation]...
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- 5 Dec at 19:35
How to add hours to current date in SQL Server?
I am trying to add hours to current time like ``` -- NOT A VALID STATEMENT -- SELECT GetDate(DATEADD (Day, 5, GETDATE())) ``` How can I get hours ahead time in SQL Server?
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- 29 Aug at 18:19
SQL Server - Create a copy of a database table and place it in the same database?
I have a table ABC in a database DB. I want to create copies of ABC with names ABC_1, ABC_2, ABC_3 in the same DB. How can I do that using either Management Studio (preferably) or SQL queries ? This ...
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- 25 Mar at 22:56
How do I set a cookie on HttpClient's HttpRequestMessage
I am trying to use the web api's `HttpClient` to do a post to an endpoint that requires login in the form of an HTTP cookie that identifies an account (this is only something that is `#ifdef`'ed out o...
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- 11 Sep at 16:38
(13: Permission denied) while connecting to upstream:[nginx]
I am working with configuring Django project with Nginx and Gunicorn. While I am accessing my port `gunicorn mysite.wsgi:application --bind=127.0.0.1:8001` in Nginx server, I am getting the following...
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- 8 Sep at 15:24
String concatenation in MySQL
I am using MySQL and MySQL Workbench 5.2 CE. When I try to concatenate 2 columns, `last_name` and `first_name`, it doesn't work : ``` select first_name + last_name as "Name" from test.student ```
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- 2 Feb at 23:48
Using NOT operator in IF conditions
Is it really a good practice to avoid using NOT operator in IF conditions in order to make your code better readable? I heard the `if (doSomething())` is better then `if (!doSomething()).`
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- 19 Feb at 20:40
right click context menu for datagridview
I have a datagridview in a .NET winform app. I would like to rightclick on a row and have a menu pop up. Then i would like to select things such as copy, validate, etc How do i make A) a menu pop up ...
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- 9 Feb at 17:4
printing a value of a variable in postgresql
I have a postgresql function ``` CREATE OR REPLACE FUNCTION fixMissingFiles() RETURNS VOID AS $$ DECLARE deletedContactId integer; BEGIN SELECT INTO deletedContactId contact_id FR...
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- 6 Oct at 20:36