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Mutex example / tutorial? [closed]
...pt. Hope the example gives you a clear picture of the concept.]
With C++11 threading:
#include <iostream>
#include <thread>
#include <mutex>
std::mutex m;//you can use std::lock_guard if you want to be exception safe
int i = 0;
void makeACallFromPhoneBooth()
{
m.lock();/...
SQL: How to get the count of each distinct value in a column?
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1 Answer
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Active
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Nginx缓存解决方案:SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术
...表一表Nginx配置文件长啥样:
lua_shared_dict phoenix_status 100m;
lua_package_path '/path/to/phoenix/include/?.lua;/path/to/phoenix/vendor/?.lua;;';
init_by_lua_file /path/to/phoenix/config.lua;
server {
listen 80;
server_name foo.com;
root /path/to/root;
...
Getting image dimensions without reading the entire file
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106
Your best bet as always is to find a well tested library. However, you said that is difficult,...
How to list all the files in a commit?
...rmatted list of all files that were part of the commit given by a hash (SHA1), with no extraneous information.
30 Answers
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Why is Java's boolean primitive size not defined?
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116
Short answer: yes, boolean values are manipulated as 32-bit entities, but arrays of booleans u...
Appending to an empty DataFrame in Pandas?
...ata = pd.DataFrame({"A": range(3)})
>>> df.append(data)
A
0 0
1 1
2 2
But the append doesn't happen in-place, so you'll have to store the output if you want it:
>>> df
Empty DataFrame
Columns: []
Index: []
>>> df = df.append(data)
>>> df
A
0 0
1 1
2 ...
PSQLException: current transaction is aborted, commands ignored until end of transaction block
...ing the following (truncated) stacktrace in the server.log file of JBoss 7.1.1 Final:
20 Answers
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What is “point free” style (in Functional Programming)?
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edited Oct 28 '15 at 2:20
Nayuki
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answ...
How to keep the local file or the remote file during merge using Git and the command line?
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314
You can as well do:
git checkout --theirs /path/to/file
to keep the remote file, and:
git c...