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Python constructors and __init__
Why are constructors indeed called "Constructors"? What is their purpose and how are they different from methods in a class?
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Passing two command parameters using a WPF binding
I have a command which I am executing from my XAML file using the following standard syntax:
5 Answers
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load scripts asynchronously
I am using several plugins, custom widgets and some other libraries from JQuery. as a result I have several .js and .css files. I need to create a loader for my site because it takes some time to load. it will be nice if I can display the loader before importing all the:
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Sorting Python list based on the length of the string
... such that cmp(x, y) returns -1 if x is less than y, 0 if x is equal to y, and 1 if x is greater than y.
Of course, you can instead use the key parameter:
xs.sort(key=lambda s: len(s))
This tells the sort method to order based on whatever the key function returns.
EDIT: Thanks to balpha and Ruslan ...
Increase number of axis ticks
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You can override ggplots default scales by modifying scale_x_continuous and/or scale_y_continuous. For example:
library(ggplot2)
dat <- data.frame(x = rnorm(100), y = rnorm(100))
ggplot(dat, aes(x,y)) +
geom_point()
Gives you this:
And overriding the scales can give you something like...
What is a callback URL in relation to an API?
I've been scouring the net, and can't seem to wrap my head around the idea of a callback URL. In my case I have a few callback URLs that I have to define myself. A popular one is a "default callback URL". What is this exactly? Can you give an example in plain english?
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Appending an element to the end of a list in Scala
...tried with myList ::= myElement but it seems it creates a strange object and accessing to myList.last always returns the first element that was put inside the list. How can I solve this problem?
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Importing from a relative path in Python
I have a folder for my client code, a folder for my server code, and a folder for code that is shared between them
5 Answer...
Difference between knockout View Models declared as object literals vs functions
...s to set a variable in the function equal to the appropriate value of this and use it instead. This would be like:
var ViewModel = function() {
var self = this;
this.items = ko.observableArray();
this.removeItem = function(item) {
self.items.remove(item);
}
};
Now, if yo...
When to use os.name, sys.platform, or platform.system?
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Dived a bit into the source code.
The output of sys.platform and os.name are determined at compile time. platform.system() determines the system type at run time.
sys.platform is specified as a compiler define during the build configuration.
os.name checks whether certain os specific...