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Forward an invocation of a variadic function in C
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If you don't have a function analogous to vfprintf that takes a va_list instead of a variable number of arguments, you can't do it. See http://c-faq.com/varargs/handoff.html.
Example:
void myfun(const char *fmt, va_list argp) {
vfprintf(stderr, fmt, argp);
}
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How is it possible to declare nothing inside main() in C++ and yet have a working application after
... ignore has to be initialized before entering into main() function. Now in order to initialize the global, print_fibs() needs to be executed where you can do anything — in this case, compute fibonacci numbers and print them! A similar thing I've shown in the following question (which I had asked l...
Access multiple elements of list knowing their index
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Alternatives:
>>> map(a.__getitem__, b)
[1, 5, 5]
>>> import operator
>>> operator.itemgetter(*b)(a)
(1, 5, 5)
share
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impro...
Multiple Models in a single django ModelForm?
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But how? Usually a FormView only has a single form_class assigned to it.
– erikbwork
Oct 7 '16 at 17:42
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Detect & Record Audio in Python
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from struct import pack
import pyaudio
import wave
THRESHOLD = 500
CHUNK_SIZE = 1024
FORMAT = pyaudio.paInt16
RATE = 44100
def is_silent(snd_data):
"Returns 'True' if below the 'silent' threshold"
return max(snd_data) < THRESHOLD
def normalize(snd_data):
"Average the volume out"
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Timeout for python requests.get entire response
...snippet will work for you:
import requests
import eventlet
eventlet.monkey_patch()
with eventlet.Timeout(10):
requests.get("http://ipv4.download.thinkbroadband.com/1GB.zip", verify=False)
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Pragma in define macro
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If you're using c99 or c++0x there is the pragma operator, used as
_Pragma("argument")
which is equivalent to
#pragma argument
except it can be used in macros (see section 6.10.9 of the c99 standard, or 16.9 of the c++0x final committee draft)
For example,
#define STRINGIFY(a) #a
#def...
Why is it slower to iterate over a small string than a small list?
...sions. I'll examine the compiled code.
For Python 3:
import dis
def list_iterate():
[item for item in ["a", "b", "c"]]
dis.dis(list_iterate)
#>>> 4 0 LOAD_CONST 1 (<code object <listcomp> at 0x7f4d06b118a0, file "", line 4>)
#>>> ...
fancybox2 / fancybox causes page to to jump to the top
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The problem is that fancy box changes the overflow value of the body in order to hide the browser scrollbars.
As Dave Kiss points out, we can stop fancy box from doing this by adding the following parameters:
$('.image').fancybox({
padding: 0,
helpers: {
overlay: {
locked: false
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Open link in new tab or window [duplicate]
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You should add the target="_blank" and rel="noopener noreferrer" in the anchor tag.
For example:
<a target="_blank" rel="noopener noreferrer" href="http://your_url_here.html">Link</a>
Adding rel="noopener noreferrer" is not mandatory, b...