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How to overcome TypeError: unhashable type: 'list'
...
As indicated by the other answers, the error is to due to k = list[0:j], where your key is converted to a list. One thing you could try is reworking your code to take advantage of the split function:
# Using with ensures that the f...
TypeScript “this” scoping issue when called in jquery callback
...ly there is no obvious best solution and it will really depend on the application.
Automatic Class Binding
As shown in your question:
class DemonstrateScopingProblems {
private status = "blah";
public run = () => {
alert(this.status);
}
}
Good/bad: This creates an additi...
CSS filter: make color image with transparency white
...
You can use
filter: brightness(0) invert(1);
html {
background: red;
}
p {
float: left;
max-width: 50%;
text-align: center;
}
img {
display: block;
max-width: 100%;
}
.filter {
-webkit-filter: br...
What is “stdafx.h” used for in Visual Studio?
A file named stdafx.h is automatically generated when I start a project in Visual Studio 2010. I need to make a cross-platform C++ library, so I don't/can't use this header file.
...
Recommended way to save uploaded files in a servlet application
...ires external parameters. However, given that I need a tmp solution for tomcat (7) and that I have (relative) control over the server machine I want to know :
...
Is it possible to run JavaFX applications on iOS, Android or Windows Phone 8?
Can one develop an entire application using JavaFX and run it on iOS, Android or Windows Phone 8, without writing platform-specific code?
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Signtool error: No certificates were found that met all given criteria with a Windows Store App?
...
When getting this error through Visual Studio it was because there was a signing certificate setup to match the computer it was originally developed on.
You can check this by going to the project properties > signing tab and checking the certificate details.
You can uncheck ...
Erlang's 99.9999999% (nine nines) reliability
...nachievable ... but we did 9.
Why is this? No shared state, plus a sophisticated error recovery model.
If you dig a bit deeper, in the PhD thesis written by Joe, the original author of Erlang (which includes a case study of AXD301), you read:
One of the projects studied in this chapter is the Eric...
Python extending with - using super() Python 3 vs Python 2
...r new-style classes:
super(CurrentClass, self)
for old-style classes you can always use:
class Classname(OldStyleParent):
def __init__(self, *args, **kwargs):
OldStyleParent.__init__(self, *args, **kwargs)
...
When to use an object instance variable versus passing an argument to the method
...en to use instance variables, how to define their scope, and when to use local variables is subjective, but there are a couple of rules of thumb you can follow whenever creating your classes.
Instance variables are typically considered to be attributes of a class. Think of these as adjectives of t...