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How to determine the version of the C++ standard used by the compiler?
... version of the C++ standard is implemented by your compiler? As far as I know, below are the standards I've known:
8 Answe...
Error while installing json gem 'mkmf.rb can't find header files for ruby'
...ols
ruby -rrbconfig -e 'puts RbConfig::CONFIG["rubyhdrdir"]'
This should now correctly print
/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/include/ruby-2.3.0
Likewise, gem install should work while that SDK is selected.
To sw...
Execute JavaScript using Selenium WebDriver in C#
... I didn't even consider this as possible. This is huge as I can now create a method using javascript to return nextSibling.
– jibbs
Jan 18 '17 at 18:25
add a commen...
python multithreading wait till all threads finished
...
okay, i see. now i understand, was a bit confused about it but i think i understand, join sort of attaches the current process to the thread and waits till its done, and if t2 finishs before t1 then when t1 is done it will check for t2 be...
“webxml attribute is required” error in Maven
...eos\maven-projects\my-project\src\webapp\WEB-INF" and worked good. I dont know what is the problem. Its my luck. Thank you
– Bunny Joel
Jan 11 '18 at 14:02
1
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How to check if a process id (PID) exists
...s -p $PID > /dev/null
then
echo "$PID is running"
# Do something knowing the pid exists, i.e. the process with $PID is running
fi
The problem with:
kill -0 $PID
is the exit code will be non-zero even if the pid is running and you dont have permission to kill it. For example:
kill -0 1...
Apache shows PHP code instead of executing it
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There is no file called php in mods-enabled, what now? This answer does not explain stuff
– Black
Mar 7 '17 at 11:00
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App Inventor 2 云数据库配置教程 - Firebase/云数据库1/自建后台 · App Inventor 2 中文网
...(tag, value) VALUES (?, ?) ON DUPLICATE KEY UPDATE value = ?, updated_at = NOW()', [tag, value, value]);
return res.json(['STORED', tag, value]);
}
if (req.params.action === 'getvalue') {
const [rows] = await pool.execute('SELECT value FROM store WHERE tag = ?', [tag]);
ret...
Shell command to sum integers, one per line?
...the stack has two or more values, run "add_top_of_stack"
Print the result, now the only item left in the stack
To really understand the simplicity and power of dc, here is a working Python script that implements some of the commands from dc and executes a Python version of the above command
How do you list the primary key of a SQL Server table?
Simple question, how do you list the primary key of a table with T-SQL? I know how to get indexes on a table, but can't remember how to get the PK.
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