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What are all the valid self-closing elements in XHTML (as implemented by the major browsers)?
...ut browsers follow it religiously. Read
Understanding HTML, XML and XHTML from WebKit blog:
In fact, the vast majority of supposedly XHTML documents on the internet are served as text/html. Which means they are not XHTML at all, but actually invalid HTML that’s getting by on the error handlin...
Choosing between qplot() and ggplot() in ggplot2 [closed]
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One more variant from me: I use qplot when I'm typing directly into the console, and ggplot when I'm writing scripts. But after finding over and over again that I want to recreate a plot I typed into the console 15 minutes earlier, I write a...
When NOT to use yield (return) [duplicate]
...t get thrown until the iterator is
// iterated, which can be very far away from this method invocation
public IEnumerable<string> Foo(Bar baz)
{
if (baz == null)
throw new ArgumentNullException();
yield ...
}
// DO this
public IEnumerable<string> Foo(Bar baz)
{
if ...
using awk with column value conditions
I'm learning awk from The AWK Programming Language and I have a problem with one of the examples.
6 Answers
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What does -fPIC mean when building a shared library?
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The 'f' is a hangover from the way that gcc handeled command line arguments (this was a couple of years ago and they have changed this part of the code I have not looked recently). But at the time only certain letters or combinations were allowed ...
What is __declspec and when do I need to use it?
...t), which instruct the linker to import and export (respectively) a symbol from or to a DLL.
// header
__declspec(dllimport) void foo();
// code - this calls foo() somewhere in a DLL
foo();
(__declspec(..) just wraps up Microsoft's specific stuff - to achieve compatibility, one would usually wr...
What is the JavaScript >>> operator and how do you use it?
I was looking at code from Mozilla that add a filter method to Array and it had a line of code that confused me.
7 Answers
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OSError: [Errno 2] No such file or directory while using python subprocess in Django
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Use shell=True if you're passing a string to subprocess.call.
From docs:
If passing a single string, either shell must be True or
else the string must simply name the program to be executed without
specifying any arguments.
subprocess.call(crop, shell=True)
or:
import shlex...
Difference between session affinity and sticky session?
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Sticky session means that when a request comes into a site from a client all further requests go to the same server initial client request accessed. I believe that session affinity is a synonym for sticky session.
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How to print a date in a regular format?
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You can use from datetime import datetime, and then print datetime().now().strftime("%Y-%m-%d %H:%M"). Only a syntax difference.
– Daniel Magnusson
Nov 19 '13 at 8:44
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