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When to use references vs. pointers
... until you can't.
The reason is that pointers make things harder to follow/read, less safe and far more dangerous manipulations than any other constructs.
So the rule of thumb is to use pointers only if there is no other choice.
For example, returning a pointer to an object is a valid option when th...
Why are Python lambdas useful? [closed]
...name, there is nothing obscure, intimidating or cryptic about it. When you read the following line, replace lambda by function in your mind:
>>> f = lambda x: x + 1
>>> f(3)
4
It just defines a function of x. Some other languages, like R, say it explicitly:
> f = function(x)...
Deleting multiple elements from a list
... be shifted forward multiple times. (b) At least for me, it's difficult to read, because there is a sort function that doesn't correspond to any actual program logic, and exists solely for technical reasons. Even though by now I already understand the logic thoroughly, I still feel it would be diffi...
What should I name a table that maps two tables together? [closed]
...at represents a many-to-many relationship makes the relationship easier to read and understand. Sometimes finding a great name is not trivial but usually it is worth to spend some time thinking about.
An example: Reader and Newspaper.
A Newspaper has many Readers and a Reader has many Newspapers
...
View all TODO items in Visual Studio using GhostDoc
...sual Studio 2008. How do I view all to-do items and if that's a function already in Visual Studio or in GhostDoc (the documentation tool that I use)?
...
Subprocess changing directory
...ss.PIPE, universal_newlines=True) # run our new command
out = p.stdout.read()
err = p.stderr.read()
# read our output
if out != "":
print(out)
os.chdir(out[0:len(out) - 1]) # if we did get a directory, go to there while ignoring the newline
if err != "":
...
What's causing my java.net.SocketException: Connection reset? [duplicate]
...nt, or rather the server closed the connection, you would just get -1 from read(), and an EOFException. When I get home I plan on confirming this either way.
– Zombies
Apr 22 '10 at 15:39
...
How can I do a line break (line continuation) in Python?
... so backslashes are acceptable:
with open('/path/to/some/file/you/want/to/read') as file_1, \
open('/path/to/some/file/being/written', 'w') as file_2:
file_2.write(file_1.read())
Another such case is with assert statements.
Make sure to indent the continued line appropriately...
When would you use delegates in C#? [closed]
...e days I use delegates for:
Event handlers (for GUI and more)
Starting threads
Callbacks (e.g. for async APIs)
LINQ and similar (List.Find etc)
Anywhere else where I want to effectively apply "template" code with some specialized logic inside (where the delegate provides the specialization)
...
Getting command-line password input in Python
...that nobody can look at the source code and find out your password just by reading it, and nobody can get your password by just staring over your shoulder and reading your password off the screen when you type it in.
– ArtOfWarfare
Jul 2 '14 at 11:38
...