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List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
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(Here's the script if anyone's interested or wants to raise any issues:)
from copy import deepcopy
class old_class:
def __init__(self):
self.blah = 'blah'
class new_class(object):
def __init__(self):
self.blah = 'blah'
dignore = {str: None, unicode: None, int: None, type...
Best way to convert an ArrayList to a string
...n a StringBuilder anyway. Here's a part of the disassembly of the bytecode from the for loop from the above program:
61: new #13; //class java/lang/StringBuilder
64: dup
65: invokespecial #14; //Method java/lang/StringBuilder."<init>":()V
68: aload_2
69: invokevirtual ...
Get image data url in JavaScript?
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Note: This only works if the image is from the same domain as the page, or has the crossOrigin="anonymous" attribute and the server supports CORS. It's also not going to give you the original file, but a re-encoded version. If you need the result to be identical ...
Print Var in JsFiddle
How would I print something to the result screen in JsFiddle from my JavaScript. I can't use document.write() , it doesn't allow it, neither print .
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Objective-C Static Class Level variables
...program exactly one time just before the class, or any class that inherits from it, is sent its first message from within the program. (Thus the method may never be invoked if the class is not used.)".
Feel free to use the static variable within any ClassA class/instance method.
Code sample:
file...
How and why does 'a'['toUpperCase']() in JavaScript work?
...rCase'];
is the access via bracket notation on the property toUpperCase, from String.prototype. Since this property references a method, we can invoke it by attaching ()
'a'['toUpperCase']();
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JavaScript console.log causes error: “Synchronous XMLHttpRequest on the main thread is deprecated…”
...ous XMLHttpRequest outside of workers is in the process of
being removed from the web platform as it has detrimental effects to
the end user's experience. (This is a long process that takes many
years.) Developers must not pass false for the async argument when the
JavaScript global environm...
difference between use and require
...h says "namespaces are a honking great idea, we should have more of them" (from "The Zen of Python") -- so e.g. that style recommends not using "using namespace foo;" in C++, so that readers and maintainers of the code won't have to worry "where does this bar come from" but see a more explicit foo::...
What is the best open-source java charting library? (other than jfreechart) [closed]
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@pyinsci: some shops prevent servers from connecting to external internet servers (even if the servers are reachable from the internet) for security reasons.
– Joachim Sauer
May 17 '10 at 13:36
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Java: Difference between PrintStream and PrintWriter
...lt encoding is generally a bad thing since it can lead to bugs when moving from one platform to another, especially if you are generating the file on one platform and consuming it on another.
With a Writer, you typically specify the encoding to use, avoiding any platform dependencies.
Why bother h...