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What's the difference between `on` and `live` or `bind`?
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Remove blank lines with grep
...y work for files with zero or 1 space on the line, not for files with 2 or more spaces. Change ? to *.
– Ed Morton
Dec 8 '12 at 9:42
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How can I strip first X characters from string using sed?
...want to strip first X characters from the line, so only 1234 stays. I have more variables I need to "clean", so I need to cut away X first characters and ${string:5} doesn't work for some reason in my system.
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Convert a date format in PHP
... site.)
Note that this was a quick solution to the original question. For more extensive conversions, you should really be using the DateTime class to parse and format :-)
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How to mkdir only if a directory does not already exist?
...'t exist.
Some implementation like GNU mkdir include mkdir --parents as a more readable alias, but this is not specified in POSIX/Single Unix Specification and not available on many common platforms like macOS, various BSDs, and various commercial Unixes, so it should be avoided.
If you want an er...
Is it secure to store passwords as environment variables (rather than as plain text) in config files
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On a more theoretical level, I tend to think about levels for security in the following ways (in order of increasing strength) :
No security. Plain text. Anyone that knows where to look, can access the data.
Security by Obfusc...
Static method behavior in multi-threaded environment in java
...sant's answer is good. But I thought I would try and explain at a slightly more simple level for anybody who comes across this and is newish to Java. Here goes..
Memory in java is split up into two kinds - the heap and the stacks. The heap is where all the objects live and the stacks are where the ...
What is the best open-source java charting library? (other than jfreechart) [closed]
Why are there not more opensource easy to use charting libraries for Java?. The only successful opensource project in this area seems to be jfreechart, and it doesn't even have any documentation or examples available.
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How do I update each dependency in package.json to the latest version?
...is empty and nothing can break.
On the other hand, if you're working in a more mature project, you probably want to verify that there are no breaking changes in your dependencies before upgrading.
To see which modules are outdated, just run npm outdated. It will list any installed dependencies th...
When to make a type non-movable in C++11?
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