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Create Django model or update if exists
... update the user object.
Sample use is as follows:
# In both cases, the call will get a person object with matching
# identifier or create one if none exists; if a person is created,
# it will be created with name equal to the value in `name`.
# In this case, if the Person already exists, its exi...
What is the rationale for fread/fwrite taking size and count as arguments?
...mplemented.
The Single UNIX Specification says
For each object, size calls shall be
made to the fgetc() function and the
results stored, in the order read, in
an array of unsigned char exactly
overlaying the object.
fgetc also has this note:
Since fgetc() operates on bytes,
read...
Soft wrap at 80 characters in Vim in window of arbitrary width
... wasting 6 columns of screen real estate this way too. So there are still all kinds of problems.
You can highlight past the 80th column using :match like it says here and here.
Beyond that I can't see any way to do this. Seems like it'd be a nice feature though.
...
Why is Thread.Sleep so harmful
...
The problems with calling Thread.Sleep are explained quite succinctly here:
Thread.Sleep has its use: simulating lengthy operations while testing/debugging on an MTA thread. In .NET there's no other reason to use it.
Thread.Sleep(n) m...
RSpec: describe, context, feature, scenario?
...
The context is an alias for describe, so they are functionally equivalent. You can use them interchangeably, the only difference is how your spec file reads. There is no difference in test output for example. The RSpec book says:
"We tend to use describe() for things and context...
Effects of the extern keyword on C functions
...since it will be encountered later. Functions and variables are treated equally in this regard.
It's very useful if you need to share some global between modules and don't want to put / initialize it in a header.
Technically, every function in a library public header is 'extern', however labeling...
How to set custom location for local installation of npm package?
Is it possible to specify a custom package destination for npm install , either through a command flag or environment variable?
...
Closing WebSocket correctly (HTML5, Javascript)
...ink the connection is still open even when it's not.
The browser should really do this for you when you close or reload the page. However, you can make sure a close frame is sent by doing capturing the beforeunload event:
window.onbeforeunload = function() {
websocket.onclose = function () {};...
Why use argparse rather than optparse?
...recated, and will hopefully go away in the future.
argparse is better for all the reasons listed on its original page (https://code.google.com/archive/p/argparse/):
handling positional arguments
supporting sub-commands
allowing alternative option prefixes like + and /
handling zero-or-more and on...
What does the star operator mean, in a function call?
...ues = (1, 2)
s = sum(*values)
This will unpack the tuple so that it actually executes as:
s = sum(1, 2)
The double star ** does the same, only using a dictionary and thus named arguments:
values = { 'a': 1, 'b': 2 }
s = sum(**values)
You can also combine:
def sum(a, b, c, d):
return a ...