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UnicodeDecodeError when redirecting to file
...array of bytes. This distinction has been mostly ignored for a long time because of the historic ubiquity of encodings with no more than 256 characters (ASCII, Latin-1, Windows-1252, Mac OS Roman,…): these encodings map a set of common characters to numbers between 0 and 255 (i.e. bytes); the rela...
How to get the seconds since epoch from the time + date output of gmtime()?
...
If you got here because a search engine told you this is how to get the Unix timestamp, stop reading this answer. Scroll down one.
If you want to reverse time.gmtime(), you want calendar.timegm().
>>> calendar.timegm(time.gmtime())
...
Get the closest number out of an array
...
downside is that it only works if reduce's callback is called from the same scope as the declared vars. Since you can't pass goal to reduce, you must reference it from a global scope.
– 7yl4r
Feb 6 '15 at 15:09
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Understanding PrimeFaces process/update and JSF f:ajax execute/render attributes
...rocess> <f:ajax execute>
The process attribute is server side and can only affect UIComponents implementing EditableValueHolder (input fields) or ActionSource (command fields). The process attribute tells JSF, using a space-separated list of client IDs, which components exactly must be proc...
Is MATLAB OOP slow or am I doing something wrong?
... be able to do things like a + b , a == b , a.find( b ) instead
of strcat( a b ) , strcmp( a, b ) , retrieve first element of strfind( a, b ) , etc.
...
Why does GCC generate such radically different assembly for nearly the same C code?
...y tinkering with the code, I've managed to see how GCC optimizes the first case.
Before we can understand why they are so different, first we must understand how GCC optimizes fast_trunc_one().
Believe it or not, fast_trunc_one() is being optimized to this:
int fast_trunc_one(int i) {
int mantis...
What Every Programmer Should Know About Memory?
...ber Drepper's content describes fundamental concepts about memory: how CPU cache works, what are physical and virtual memory and how Linux kernel deals that zoo. Probably there are outdated API references in some examples, but it doesn't matter; that won't affect the relevance of the fundamental con...
u'\ufeff' in Python string
...n).
When opening a file, Python 3 supports the encoding keyword to automatically handle the encoding.
Without it, the BOM is included in the read result:
>>> f = open('file', mode='r')
>>> f.read()
'\ufefftest'
Giving the correct encoding, the BOM is omitted in the result:
>...
Which timestamp type should I choose in a PostgreSQL database?
...e handling and arithmetic is fantastic and Option 3 is fine in the general case. It is, however, an incomplete view of time and timezones and can be supplemented:
Store the name of a user’s time zone as a user preference (e.g. America/Los_Angeles, not -0700).
Have user events/time data submitted...
Why doesn't Java offer operator overloading?
... Java, operator= doesn't perform value copy for reference types, and users can only create new reference types, not value types. So for a user-defined type named Complex, assignment means to copy a reference to an existing value.
Consider instead:
b.set(1, 0); // initialize to real number '1'
a = ...