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How to retrieve an element from a set without removing it?
...
Two options that don't require copying the whole set:
for e in s:
break
# e is now an element from s
Or...
e = next(iter(s))
But in general, sets don't support indexing or slicing.
share
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Decorators with parameters?
I have a problem with the transfer of variable 'insurance_mode' by the decorator. I would do it by the following decorator statement:
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What is the JavaScript equivalent of var_dump or print_r in PHP? [duplicate]
...ble, 'none')
/* repeatString() returns a string which has been repeated a set number of times */
function repeatString(str, num) {
out = '';
for (var i = 0; i < num; i++) {
out += str;
}
return out;
}
/*
dump() displays the contents of a variable like var_dump() does in ...
C语言结构体里的成员数组和指针 - c++1y / stl - 清泛IT社区，为创新赋能！
...t;
struct str{
int len;
char s[0];
};
struct foo {
struct str *a;
};
int main(int argc, char** argv) {
struct foo f={0};
if (f.a->s) {
printf( f.a->s);
}
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PHP Array to CSV
I'm trying to convert an array of products into a CSV file, but it doesn't seem to be going to plan. The CSV file is one long line, here is my code:
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Can I use a binary literal in C or C++?
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You can use BOOST_BINARY while waiting for C++0x. :) BOOST_BINARY arguably has an advantage over template implementation insofar as it can be used in C programs as well (it is 100% preprocessor-driven.)
To do the converse (i.e. print out a number in binary form)...
Find current directory and file's directory [duplicate]
In Python, what commands can I use to find:
13 Answers
13
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How can I split a string into segments of n characters?
As the title says, I've got a string and I want to split into segments of n characters.
12 Answers
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Convert audio files to mp3 using ffmpeg
...g album cover image) is included if the source would be a video file
-ar - Set the audio sampling frequency. For output streams it is set by default to the frequency of the corresponding input stream. For input streams this option only makes sense for audio grabbing devices and raw demuxers and is m...
What does java.lang.Thread.interrupt() do?
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Thread.interrupt() sets the interrupted status/flag of the target thread. Then code running in that target thread MAY poll the interrupted status and handle it appropriately. Some methods that block such as Object.wait() may consume the inter...