Applying function with multiple arguments to create a new pandas column
I want to create a new column in a `pandas` data frame by applying a function to two existing columns. Following this [answer](https://stackoverflow.com/a/14603893/2327821) I've been able to create a ...
python max function using 'key' and lambda expression
I come from OOP background and trying to learn python. I am using the `max` function which uses a lambda expression to return the instance of type `Player` having maximum `totalScore` among the list `...
Set Matplotlib colorbar size to match graph
I cannot get the colorbar on imshow graphs like this one to be the same height as the graph, short of using Photoshop after the fact. How do I get the heights to match?![Example of the colorbar size m...
- Modified
- 20 Jun at 09:12
How to use continue in jQuery each() loop?
In my application i am using AJAX call. I want to use `break` and `continue` in this jQuery loop. ``` $('.submit').filter(':checked').each(function() { }); ```
Auto-center map with multiple markers in Google Maps API v3
This is what I use to display a map with 3 pins/markers: ``` <script> function initialize() { var locations = [ ['DESCRIPTION', 41.926979, 12.517385, 3], ['DESCRIPTION', 41.914873, ...
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- 26 Apr at 20:27
Replacing blank values (white space) with NaN in pandas
I want to find all values in a Pandas dataframe that contain whitespace (any arbitrary amount) and replace those values with NaNs. Any ideas how this can be improved? Basically I want to turn this: ...
How do you implement a re-try-catch?
Try-catch is meant to help in the exception handling. This means somehow that it will help our system to be more robust: try to recover from an unexpected event. We suspect something might happen wh...
How do I resolve the "java.net.BindException: Address already in use: JVM_Bind" error?
In Eclipse, I got this error: ``` run: [java] Error creating the server socket. [java] Oct 04, 2012 5:31:38 PM cascadas.ace.AceFactory bootstrap [java] SEVERE: Failed to create world :...
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- 4 Oct at 23:7
How to get child element by class name?
I'm trying to get the child span that has a class = 4. Here is an example element: ``` <div id="test"> <span class="one"></span> <span class="two"></span> <span class="three"></span> <span class=...
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- 6 Feb at 07:30
How to output a comma delimited list in jinja python template?
If I have a list of `users` say `["Sam", "Bob", "Joe"]`, I want to do something where I can output in my jinja template file: ``` {% for user in userlist %} <a href="/profile/{{ user }}/">{{ user...
Find all files with name containing string
I have been searching for a command that will return files from the current directory which contain a string in the filename. I have seen `locate` and `find` commands that can find files beginning wit...
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- 3 Dec at 12:22
How to convert integer timestamp into a datetime
I have a data file containing timestamps like "1331856000000". Unfortunately, I don't have a lot of documentation for the format, so I'm not sure how the timestamp is formatted. I've tried Python's st...
Git index.lock File exists when I try to commit, but I cannot delete the file
When I do 'git commit', I'm getting the following: `fatal: Unable to create 'project_path/.git/index.lock': File exists.` However, when I do `ls project_path/.git/index.lock` it's saying the file does...
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- 16 Feb at 05:26
How to get overall CPU usage (e.g. 57%) on Linux
I am wondering how you can get the system CPU usage and present it in percent using bash, for example. Sample output: ``` 57% ``` In case there is more than one core, it would be nice if an averag...
How to cut an entire line in vim and paste it?
I know how to use the `v` command in vim, but I need something which will delete an entire line and it should allow me to paste the same line somewhere else.
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- 7 Jan at 21:59
How I can delete in VIM all text from current line to end of file?
I have very large files (more than 10Gb). I need only some lines from the top of the file. Is it possible (in vim) to delete the rest of the file (from current line to the end of file)?
Insert line break inside placeholder attribute of a textarea?
I have tried a few approaches but none worked. Does anyone know a the nifty trick to get around this? ``` <textarea placeholder='This is a line \n this should be a new line'></textarea> <textarea pl...
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- 12 Aug at 15:0
Is an anchor tag without the href attribute safe?
Is it okay to use an anchor tag without including the `href` attribute, and instead using a JavaScript click event handler? So I would omit the `href` completely, not even have it empty (`href=""`).
Set opacity of background image without affecting child elements
Is it possible to set the opacity of a background image without affecting the opacity of child elements? # Example All links in the footer need a custom bullet (background image) and the opacity ...
What, exactly, is needed for "margin: 0 auto;" to work?
I know that setting `margin: 0 auto;` on an element is used to centre it (left-right). However, I know that the element and its parent must meet certain criteria for the auto margin to work, and I can...
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- 10 Feb at 09:7
How to step through Python code to help debug issues?
In Java/C# you can easily step through code to trace what might be going wrong, and IDE's make this process very user friendly. Can you trace through python code in a similar fashion?
How do I delay a function call for 5 seconds?
I want `widget.Rotator.rotate()` to be delayed 5 seconds between calls... how do I do this in jQuery... it seems like jQuery's `delay()` wouldn't work for this...
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- 19 Jan at 17:33
The requested operation cannot be performed on a file with a user-mapped section open
Whenever I tried to copy 4 files into my bin folder, after stopping the main service, I am getting an error with one file (TexteDll). The error is: ``` Cannot copy TexteDll: The requested operation c...
The type initializer for 'MyClass' threw an exception
The following is my Windows service code. When I am debugging the code, I am getting the error/ exception: > The type initializer for 'CSMessageUtility.CSDetails' threw an exception. ``` using Syste...
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- 26 Jul at 19:33
How to change the text on the action bar
Currently it just displays the name of the application and I want it to display something custom and be different for each screen in my app. For example: my home screen could say 'page1' in the actio...
- Modified
- 17 Jan at 10:6