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Iterate through a HashMap [duplicate]
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Iterate through the entrySet() like so:
public static void printMap(Map mp) {
Iterator it = mp.entrySet().iterator();
while (it.hasNext()) {
Map.Entry pair = (Map.Entry)it.next();
System.out.println(pair.getKey() + " = " + pair.getValue());
it.remove(); // avoids a...
Why are Python's 'private' methods not actually private?
...sses. It's not designed to prevent deliberate access from outside.
For example:
>>> class Foo(object):
... def __init__(self):
... self.__baz = 42
... def foo(self):
... print self.__baz
...
>>> class Bar(Foo):
... def __init__(self):
... ...
How to get image height and width using java?
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Here is something very simple and handy.
BufferedImage bimg = ImageIO.read(new File(filename));
int width = bimg.getWidth();
int height = bimg.getHeight();
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How can I make a time delay in Python? [duplicate]
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import time
time.sleep(5) # Delays for 5 seconds. You can also use a float value.
Here is another example where something is run approximately once a minute:
import time
while True:
print("This prints once a minute.")...
how to unit test file upload in django
In my django app, I have a view which accomplishes file upload.The core snippet is like this
10 Answers
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Nodejs send file in response
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Here's an example program that will send myfile.mp3 by streaming it from disk (that is, it doesn't read the whole file into memory before sending the file). The server listens on port 2000.
[Update] As mentioned by @Aftershock in the com...
Find and copy files
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edited Aug 29 at 21:25
Sergey Brunov
11.4...
multiprocessing: How do I share a dict among multiple processes?
...lves using a Manager object. Adapted from the docs:
from multiprocessing import Process, Manager
def f(d):
d[1] += '1'
d['2'] += 2
if __name__ == '__main__':
manager = Manager()
d = manager.dict()
d[1] = '1'
d['2'] = 2
p1 = Process(target=f, args=(d,))
p2 = Proce...
How does functools partial do what it does?
...)
Of those three, partial is the shortest and the fastest.
(For a more complex case you might want a custom object though).
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What is the direction of stack growth in most modern systems?
I am preparing some training materials in C and I want my examples to fit the typical stack model.
9 Answers
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