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Python how to write to a binary file?
...ry vs. text mode means in 2.x. It doesn't matter what type your bytes come from. (In 3.x, of course, binary vs. text mode means that you write bytes vs. unicode, and the \r\n feature is part of the universal newlines options for text.)
– abarnert
Dec 13 '14 at ...
Is unsigned integer subtraction defined behavior?
I have come across code from someone who appears to believe there is a problem subtracting an unsigned integer from another integer of the same type when the result would be negative. So that code like this would be incorrect even if it happens to work on most architectures.
...
Programmatically creating Markdown tables in R with KnitR
...wn instead of LaTeX or HTML). I know that I can just embed the HTML output from xtable, but I was wondering if there were any Markdown-based solutions?
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What is Cache-Control: private?
...e in the same 15-second window will all get the same contents - all served from close cache. Performance win for everyone.
The virtue of adding Cache-Control: max-age is that the browser doesn't even have to perform a conditional request.
if you specified only Last-Modified, the browser has to pe...
Chrome says “Resource interpreted as script but transferred with MIME type text/plain.”, what gives?
...ce even if you have plain .js files on the server, if comments are removed from them as they are served, if they are all packed into one large response (to reduce the number of requests, which can be more efficient), or they are minimized by the server-side application in any other way.
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Convert a float64 to an int in Go
... in Go? I know the strconv package can be used to convert anything to or from a string, but not between data types where one isn't a string. I know I can use fmt.Sprintf to convert anything to a string, and then strconv it to the data type I need, but this extra conversion seems a bit clumsy -...
Peak memory usage of a linux/unix process
...
From the man page: Most information shown by time is derived from the wait3(2) system call. The numbers are only as good as those returned by wait3(2). On systems that do not have a wait3(2) call that returns status inform...
Why is the order in dictionaries and sets arbitrary?
...s,
How CPython's hash set is stored in memory and
How numbers get hashed
From the top:
A hash set is a method of storing random data with really fast lookup times.
It has a backing array:
# A C array; items may be NULL,
# a pointer to an object, or a
# special dummy object
_ _ 4 _ _ 2 _ _ 6
W...
Are HTTP headers case-sensitive?
...
Header names are not case sensitive.
From RFC 2616 - "Hypertext Transfer Protocol -- HTTP/1.1", Section 4.2, "Message Headers":
Each header field consists of a name followed by a colon (":") and the field value. Field names are case-insensitive.
The updati...
Zip lists in Python
...e entries are 3-tuples (ai, bi, ci). Imagine drawing a zipper horizontally from left to right.
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