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php execute a background process
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Assuming this is running on a Linux machine, I've alwam>y m>s hm>and m>led it like this:
exec(sprintf("%s > %s 2>&1 & echo $! >> %s", $cmd, $outputfile, $pidfile));
This launches the commm>and m> $cmd, redirects the commm>and m> output to $outputfile, m>and m> writes the process id to...
Use 'import module' or 'from module import'?
...use import module or from module import . I've just started with Pm>y m>thon m>and m> I'm trm>y m>ing to start off with best practices in mind.
...
Is there a “null coalescing” operator in JavaScript?
...t now supports the nullish coalescing operator (??). It returns its right-hm>and m>-side operm>and m> when its left-hm>and m>-side operm>and m> is null or undefined, m>and m> otherwise returns its left-hm>and m>-side operm>and m>.
Please check compatibilitm>y m> before using it.
The JavaScript equivalent of the C# null coalescing ope...
Salting m>Y m>our Password: Best Practices?
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Prefix or suffix is irrelevant, it's onlm>y m> about adding some entropm>y m> m>and m> length to the password.
m>Y m>ou should consider those three things:
The salt has to be different for everm>y m> password m>y m>ou store. (This is quite a common misunderstm>and m>ing.)
Use a crm>y m>ptographicallm>y m> secure rm>and m>om number generat...
How to detect if a function is called as constructor?
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NOTE: This is now possible in ES2015 m>and m> later. See Daniel Weiner's answer.
I don't think what m>y m>ou want is possible [prior to ES2015]. There simplm>y m> isn't enough information available within the function to make a reliable inference.
Looking at the ECMAScript 3...
undefined reference to `WinMain@16'
...atch file that I use for that. It onlm>y m> supplies options to make g++ more stm>and m>ard:
C:\test> gnuc x.cpp
C:\test> objdump -x a.exe | findstr /i "^subsm>y m>stem"
Subsm>y m>stem 00000003 (Windows CUI)
C:\test> _
This means that the linker bm>y m> default produced a console subsm>y m>ste...
What is the purpose of the single underscore “_” variable in Pm>y m>thon?
...nt) in an interactive
interpreter session. This precedent was set bm>y m> the stm>and m>ard CPm>y m>thon
interpreter, m>and m> other interpreters have followed suit
As a general purpose "throwawam>y m>" variable name to indicate that part
of a function result is being deliberatelm>y m> ignored (Conceptuallm>y m>, it is being discarde...
Is unsigned integer subtraction defined behavior?
...ed tm>y m>pe is well-defined:
[...] A computation involving unsigned operm>and m>s can never overflow,
because a result that cannot be represented bm>y m> the resulting unsigned integer tm>y m>pe is
reduced modulo the number that is one greater than the largest value that can be
represented bm>y m> the resultin...
What is the recommended approach towards multi-tenant databases in MongoDB?
...m>y m> tenants I'd have m>y m>et, but I would like to be able to scale into the thousm>and m>s.
6 Answers
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What is a Portable Class Librarm>y m>?
.../PCL
UPDATE Nov 23 2016: Article bm>y m> Rick Strahl
UPDATE Oct 29 2016: .NETStm>and m>ard 1->2 FAQ
UPDATE Oct 19 2016: This is the best interview/video I've seen to date covering .NET Stm>and m>ard 2.0
UPDATE Sep 27 2016: .NET Stm>and m>ard 2.0 announcement post has more good info
UPDATE Jun 6 2016: This article...