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not None test in Python [duplicate]
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From, Programming Recommendations, PEP 8:
Comparisons to singletons like None should always be done with is or is not, never the equality operators.
Also, beware of writing if x when you really mean if x is not None — e.g....
How to convert an int array to String with toString method in Java [duplicate]
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What's the easiest way to go from "[x, y, z]" back to an array or List?
– clearlight
Sep 23 '15 at 21:59
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Tainted canvases may not be exported
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@markE - I loaded image data from localStorage instead of loading from file or any url, then did some manipulation to it like adding a text. Then tried to sotre back it to localStorage using toDataURL(). But it shows "Failed to execute 'toDataURL' on 'HT...
How to replace multiple substrings of a string?
...s my dog and this is my pig."
One possible fix is to use an OrderedDict.
from collections import OrderedDict
def replace_all(text, dic):
for i, j in dic.items():
text = text.replace(i, j)
return text
od = OrderedDict([("cat", "dog"), ("dog", "pig")])
my_sentence = "This is my cat a...
HTML 5 Favicon - Support?
... website one must use the following code:
Here are detailed instructions from Microsoft but here is a synopsis:
Step 1
Create a square image for your website, to support hi-res screens create it at 768x768 pixels in size.
Step 2
Add a hidden overlay of this image. Here is example code from Mic...
How to check for valid email address? [duplicate]
...ng the real name and the actual address parts of the e-mail:
>>> from email.utils import parseaddr
>>> parseaddr('foo@example.com')
('', 'foo@example.com')
>>> parseaddr('Full Name <full@example.com>')
('Full Name', 'full@example.com')
>>> parseaddr('"Ful...
Regular Expression: Any character that is NOT a letter or number
...ng str.replace(/[^\w]/);
It will replace all the non-alphabets and numbers from your string!
Edit 1: str.replace(/[^\w]/g, ' ')
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Why does this Java code compile?
...se restrictions are intended to prevent code like
int j = i;
int i = j;
from compiling. The Java spec says "the restrictions above are designed to catch, at compile time, circular or otherwise malformed initializations."
What do these rules actually boil down to?
In short, the rules basically s...
What is the default initialization of an array in Java?
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From the Java Language Specification:
Each class variable, instance variable, or array component is initialized with a default value when it is created (§15.9, §15.10):
For type byte, the default value is zer...
Why can't I forward-declare a class in a namespace using double colons?
... still wouldn't work, because you can't declare a class within a namespace from outside that namespace. You have to be in the namespace.
So, you can in fact forward declare a class within a namespace. Just do this:
namespace Namespace
{
class Class;
};
...