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NullPointerException in Java with no StackTrace
...interException) occurs for the first time, the full stack trace is printed and the JVM remembers the stack trace (or maybe just the location of the code). When that exception occurs often enough, the stack trace is not printed anymore, both to achieve better performance and not to flood the log with...
What is thread safe or non-thread safe in PHP?
...ncy approaches:
Different web servers implement different techniques for handling incoming HTTP requests in parallel. A pretty popular technique is using threads -- that is, the web server will create/dedicate a single thread for each incoming request. The Apache HTTP web server supports multiple m...
When to use EntityManager.find() vs EntityManager.getReference() with JPA
...nager.getReference(LObj.getClass(), LObj.getId()) to get a database entity and then pass the returned object to be persisted in another table.
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Error handling with node.js streams
What's the correct way to handle errors with streams? I already know there's an 'error' event you can listen on, but I want to know some more details about arbitrarily complicated situations.
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Tips for using Vim as a Java IDE? [closed]
...
Some tips:
Make sure you use vim (vi improved). Linux and some versions of UNIX symlink vi to vim.
You can get code completion with eclim
Or you can get vi functionality within Eclipse with viPlugin
Syntax highlighting is great with vim
Vim has good support for writing little ma...
how to show lines in common (reverse diff)?
...ines in common rather than the lines which are different between them. Command line unix or windows is fine.
7 Answers
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What should be the values of GOPATH and GOROOT?
...ing. On Plan 9, the value is a list.
GOPATH must be set to get, build and install packages outside the
standard Go tree.
GOROOT is discussed in the installation instructions:
The Go binary distributions assume they will be installed in
/usr/local/go (or c:\Go under Windows), but it is...
Link to reload current page
...ve been using:
<a href=".">link</a>
Have yet to find a case and/or browser where it does not work as intended.
Period means the current path. You can also use .. to refer to the folder above the current path, for instance, if you have this file structure:
page1.html
folder1
page...
One or more types required to compile a dynamic expression cannot be found. Are you missing referenc
...dow, right click to References, select Add Reference, go to .NET tab, find and add Microsoft.CSharp.
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How to write :hover condition for a:before and a:after?
How to write :hover and :visited condition for a:before ?
7 Answers
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