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What is the difference between JVM, JDK, JRE & OpenJDK?
...cific implementations of the JVM for different systems (Windows, Linux, macOS, see the Wikipedia list), the aim is that with the same bytecodes they all give the same results.
JDK and JRE
To explain the difference between JDK and JRE, the best is to read the Oracle documentation and consult the diag...
.gitignore for Visual Studio Projects and Solutions
...s an online tool which allow you to generate .gitignore file based on your OS, IDE, language, etc. Take a look at http://www.gitignore.io/.
On 8/20/2014, here's the file that is generated for Visual Studio + Windows.
# Created by http://www.gitignore.io
### VisualStudio ###
## Ignore Visual Stu...
How do I find which transaction is causing a “Waiting for table metadata lock” state?
...these InnoDB tables really hold information on metatdata locks? This blog post suggests otherwise: mysql.wisborg.dk/2014/01/13/…
– Gareth
Feb 11 '15 at 11:38
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Difference between framework vs Library vs IDE vs API vs SDK vs Toolkits? [closed]
... provides many services (rather than perhaps only one focussed ability as most libraries/SDKs do). For example, .NET provides an application framework - it makes it easier to use most (if not all) of the disparate services you need (e.g. Windows, graphics, printing, communications, etc) to write a v...
How to install packages offline?
... of something. Some packages aren't on PYPI, so same applies to them.
Suppose you have a properly formed Python application in ~/src/myapp. ~/src/myapp/setup.py will have install_requires list that mentions one or more things that you have in your /pypi directory. Like so:
install_requires=[
...
Swift: #warning equivalent
...clude directories from the find results. This shouldn't be a problem for most people, but anyone who uses the R.swift pod will run into the same error I had because R.swift is a directory
– Dan F
May 27 '16 at 14:12
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Is there a way to iterate over a dictionary?
...y]);
The alternate method (which you have to use if you're targeting Mac OS X pre-10.5, but you can still use on 10.5 and iPhone) is to use an NSEnumerator:
NSEnumerator *enumerator = [myDict keyEnumerator];
id key;
// extra parens to suppress warning about using = instead of ==
while((key = [enu...
Mac OSX Lion DNS lookup order [closed]
After upgrading to Mac OSX Lion I figured out that /etc/hosts is not looked up in first place for name resolution anymore. This leads to some side effects like:
...
How to use Sublime over SSH
...ffe.com/2011/08/13/remote-editing-with-sublime-text-2/ (among many other posts) that looks like it might help, but I don't follow it exactly, particularly with what values I should put in for the remote variable in line 5. I set "/Users/path/to/local/copy" to my local root directory, but I don't k...
Detect the Internet connection is offline?
...
You can determine that the connection is lost by making failed XHR requests.
The standard approach is to retry the request a few times. If it doesn't go through, alert the user to check the connection, and fail gracefully.
Sidenote: To put the entire application i...