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How can I join elements of an array in Bash?
...ry variable). If the concept gets to a popular Bash wiki site, they copied me :)
– konsolebox
Nov 5 '15 at 19:43
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Do I need elements in persistence.xml?
...m the Java EE 5 tutorial:
<persistence>
<persistence-unit name="OrderManagement">
<description>This unit manages orders and customers.
It does not rely on any vendor-specific features and can
therefore be deployed to any persistence provider.
...
Test whether a glob has any matches in bash
...for the existence of a single file, I can test for it using test -e filename or [ -e filename ] .
19 Answers
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How to sort by two fields in Java?
I have array of objects person (int age; String name;) .
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Java 8 stream's .min() and .max(): why does this compile?
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Let me explain what is happening here, because it isn't obvious!
First, Stream.max() accepts an instance of Comparator so that items in the stream can be compared against each other to find the minimum or maximum, in some optima...
Is JavaScript a pass-by-reference or pass-by-value language?
....item would have no effect on the obj1 outside of the function.
If the argument was a proper reference, then everything would have changed. num would be 100, and obj2.item would read "changed".
Instead, the situation is that the item passed in is passed by value. But the item that is passed by val...
Get Maven artifact version at runtime
...y given library/class.
You can simply use getClass().getPackage().getImplementationVersion() to get the version information that is stored in a .jar-files MANIFEST.MF. Luckily Maven is smart enough Unfortunately Maven does not write the correct information to the manifest as well by default!
Inste...
How do I fix a NoSuchMethodError?
I'm getting a NoSuchMethodError error when running my Java program. What's wrong and how do I fix it?
28 Answers
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What does the variable $this mean in PHP?
I see the variable $this in PHP all the time and I have no idea what it's used for. I've never personally used it.
10 An...
ssh remote host identification has changed
I've reinstalled my server and I am getting these messages:
28 Answers
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