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Serializing class instance to JSON
...SON serializable.
class Foo(object):
def __init__(self):
self.x = 1
self.y = 2
foo = Foo()
s = json.dumps(foo) # raises TypeError with "is not JSON serializable"
s = json.dumps(foo.__dict__) # s set to: {"x":1, "y":2}
The above approach is discussed in this blog posting:
...
What is the significance of initializing direction arrays below with given values when developing ch
...[i] is a different direction.
If we imagine we have a piece at a location x,y, and we want to add onto its x and its y value to move it to a nearby location, 1,0 is east, -1,0 is west, 0,1 is south, 0,-1 is north and so on.
(Here I have said top left is 0,0 and bottom right is 4,4 and shown what m...
What do I use for a max-heap implementation in Python?
Python includes the heapq module for min-heaps, but I need a max heap. What should I use for a max-heap implementation in Python?
...
Why should I prefer to use member initialization lists?
...ary call to a default constructor. Consider:
class A
{
public:
A() { x = 0; }
A(int x_) { x = x_; }
int x;
};
class B
{
public:
B()
{
a.x = 3;
}
private:
A a;
};
In this case, the constructor for B will call the default constructor for A, and then initialize ...
Tri-state Check box in HTML?
...s comment, I found a better solution:
HTML5 defines a property for checkboxes called indeterminate
See w3c reference guide. To make checkbox appear visually indeterminate set it to true:
element.indeterminate = true;
Here is Janus Troelsen's fiddle. Note, however, that:
The indeterminate stat...
Numpy `logical_or` for more than two arguments
...
If you're asking about numpy.logical_or, then no, as the docs explicitly say, the only parameters are x1, x2, and optionally out:
numpy.logical_or(x1, x2[, out]) = <ufunc 'logical_or'>
You can of course chain together multiple logical_or calls like this:
>>> x = n...
Is It Possible to Sandbox JavaScript Running In the Browser?
I'm wondering if it's possible to sandbox JavaScript running in the browser to prevent access to features that are normally available to JavaScript code running in an HTML page.
...
What characters can be used for up/down triangle (arrow without stem) for display in HTML?
... - U+25BE SMALL BLACK DOWN-POINTING TRIANGLE
For ▲ and ▼ use &#x25B2; and &#x25BC; respectively if you cannot include Unicode characters directly (use UTF-8!).
Note that the font support for the smaller versions is not as good. Better to use the large versions in smaller font.
More U...
Python: How would you save a simple settings/config file?
...ling reasons to use a different format.
Write a file like so:
# python 2.x
# from ConfigParser import SafeConfigParser
# config = SafeConfigParser()
# python 3.x
from configparser import ConfigParser
config = ConfigParser()
config.read('config.ini')
config.add_section('main')
config.set('main', ...
LLVM vs clang on OS X
I have a question concerning llvm, clang, and gcc on OS X.
3 Answers
3
...