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What is the iBeacon Bluetooth Profile
I'd like to create my own iBeacon with some Bluetooth Low Energy dev kits. Apple has yet to release a specification for iBeacons, however, a few hardware developers have reverse Engineered the iBeacon from the AirLocate Sample code and started selling iBeacon dev kits.
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What is Virtual DOM?
...components before any changes are made to the page.
It’s a step that happens between the render function being called and the displaying of elements on the screen.
A component’s render method returns some markup, but it’s not the final HTML yet. It’s the in-memory representation of what ...
How do I check CPU and Memory Usage in Java?
...emory = runtime.totalMemory();
long freeMemory = runtime.freeMemory();
sb.append("free memory: " + format.format(freeMemory / 1024) + "<br/>");
sb.append("allocated memory: " + format.format(allocatedMemory / 1024) + "<br/>");
sb.append("max memory: " + format.format(maxMemory / 1024) +...
How do I plot in real-time in a while loop using matplotlib?
...t instead create two lists x and y and call plt.plot(x,y) 2. in your loop, append new data values to the two lists 3. call plt.gca().lines[0].set_xdata(x); plt.gca().lines[0].set_ydata(y); plt.gca().relim(); plt.gca().autoscale_view(); plt.pause(0.05);
– Trevor Boyd Smith
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Angular ng-repeat Error “Duplicates in a repeater are not allowed.”
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I wanted to mention that you can apply any custom tracking property to define uniqueness, not just $index. Since in this scenario the objects don't have any other properties this works fine. The reason this error happens is that angular is using a dictionary...
Intent - if activity is running, bring it to front, else start a new one (from notification)
My app has notifications, which - obviously - without any flags, start a new activity every time so I get multiple same activities running on top of each other, which is just wrong.
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See what process is using a file in Mac OS X
...I can see the list of open processes in activity monitor but I think it's happening to quickly for me to see it. The reason for this is I'm using a framework and I think the system version of the framework is being used instead of the debug version and I'd like to see which process is touching it.
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Can I make 'git diff' only the line numbers AND changed file names?
...his in git, with the help of an "external diff" script.
Here's a pretty crappy one; it will be up to you to fix up the output the way you would like it.
#! /bin/sh
#
# run this with:
# GIT_EXTERNAL_DIFF=<name of script> git diff ...
#
case $# in
1) "unmerged file $@, can't show you line n...
Naming convention for utility classes in Java
...module); mean while a Util may be called in any context.
For example in an application related to bank accounts, all number specific utility static APIs would go to org.mycompany.util.Numbers
All "Account" specific business rule helping APIs would go to
org.mycompany.account.AccountHelper
After all...
Eclipse debugger always blocks on ThreadPoolExecutor without any obvious exception, why?
I'm working on my usual projects on Eclipse, it's a J2EE application, made with Spring, Hibernate and so on. I'm using Tomcat 7 for this (no particular reason, I don't exploit any new feature, I just wanted to try that). Every time I debug my application, it happens that Eclipse debugger pops out li...