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how to read System environment variable in Spring applicationContext
...ties(prefix="my.properties.prefix")
public class MyProperties {
// value from my.properties.prefix.myProperty will be bound to this variable
String myProperty;
// and this will even throw a startup exception if the property is not found
@javax.validation.constraints.NotNull
String myRequi...
Storing time-series data, relational or non?
...evation.
Correction
It is not "filtering out the un-needed data"; it is selecting only the needed data. Yes, of course, if you have an Index to support the columns identified in the WHERE clause, it is very fast, and the query does not depend on the size of the table (grabbing 1,000 rows from a ...
What is the full path to the Packages folder for Sublime text 2 on Mac OS Lion
...er}/Library/Application Support/Sublime Text 2/Packages
Get to it quickly from within Sublime via the menu at Sublime Text 2... Preferences... Browse Packages
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Changing the current working directory in Java?
How can I change the current working directory from within a Java program? Everything I've been able to find about the issue claims that you simply can't do it, but I can't believe that that's really the case.
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Is there an equivalent of lsusb for OS X
...won't see any endpoint information at all (which is the most useful output from lsusb).
– Maarten Bodewes
Aug 21 '17 at 11:00
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How to process SIGTERM signal gracefully?
...down gracefully. The False value is set only once, and then it can only go from False to True so multiple access is not an issue.
– Alceste_
Jul 25 '18 at 15:35
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C++ compiling on Windows and Linux: ifdef switch [duplicate]
I want to run some c++ code on Linux and Windows. There are some pieces of code that I want to include only for one operating system and not the other. Is there a standard #ifdef that once can use?
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How does Windows 8 Runtime (WinRT / Windows Store apps / Windows 10 Universal App) compare to Silver
...tioned above to see what's there; or just fire up Object Browser in VS and select "Windows 8.0" in the framework selector, to see what's covered. There's a lot there, and it doesn't deal with UI alone - you also get namespaces such as Windows.Data.Json, or Windows.Graphics.Printing, or Windows.Netwo...
How do I get the path of a process in Unix / Linux
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This is awesome. I knew I ran it from a location which had the symbolic link to the original executable (one of the many versions). pwdx <PID> gave me the location of the symbolic link so I could find the logs and stop the process in proper way.
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How do I capture bash output to the Mac OS X clipboard?
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The pbcopy command does this.
For example, this puts the output from ls on the clipboard/pasteboard:
ls | pbcopy
And pbpaste does the reverse, writing to stdout from the clipboard:
pbpaste > ls.txt
You can use both together to filter content on the clipboard - here's a rot13:
pb...