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(![]+[])[+[]]… Explain why this works
...'f'
The first part of the expression—between parentheses—is composed by ![]+[], the first operand of the Addition operator is ![] and it will produce false, because an array object—as any other Object instance—is truthy, and applying the Logical (!) NOT unary operator, it produces the valu...
Publish to S3 using Git?
.../.jgit
accesskey: aws access key
secretkey: aws secret access key
Note, by not specifying acl: public in the .jgit file, the git files on S3 will be private (which is what we wanted). Next create an S3 bucket to store your repository in, let’s call it git-repos, and then create a git repository...
Inheriting constructors
...e inherited in the C++03 standard. You needed to inherit them manually one by one by calling base implementation on your own.
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How accurate is python's time.sleep()?
... you can try out a pseudo real-time kernel (with the RT_PREEMPT patch set) by installing the rt kernel package (at least in Ubuntu 10.04 LTS).
EDIT: Correction non-realtime Linux kernels have minimum sleep interval much closer to 1ms then 10ms but it varies in a non-deterministic manner.
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How do I get the filepath for a class in Python?
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Note: does not work on a classes created by the user
– Daniel Braun
Mar 20 '19 at 14:08
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What is the effect of extern “C” in C++?
...our function definition is contained in a binary format (that was compiled by your C++ compiler) that the client C linker will then link to using the C name.
Since C++ has overloading of function names and C does not, the C++ compiler cannot just use the function name as a unique id to link to, so i...
Tmux vs. iTerm2 split panes
...f tmux: what happens if you accidentally close iterm2? If you do it really by accident, you want to reopen everything again. With tmux it is normally as simple as reattaching session without losing anything. Most terminal emulators send SIGHUP to all children which terminates them by default and thu...
How do I find the most recent git commit that modified a file?
...me a file was modified no matter the branch, you can consider all branches by adding the --all option.
– K. C.
Aug 13 '15 at 8:00
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Unlink of file Failed. Should I try again?
...ile. The file may not be actually open in eclipse but may have been opened by a process run by eclipse.
In this event, try closing the file in any applications that might have used it. If that doesn't work, completely exit any applications which may have opened the file.
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How is null + true a string?
...d as follows:
The set of candidate user-defined operators provided by X and Y for the operation operator op(x, y) is determined. The set consists of the union of the candidate operators provided by X and the candidate operators provided by Y, each determined using the rules of §7.3.5. If X ...