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Test if remote TCP port is open from a shell script
... > /dev/tcp/sfsfdfdff.com/80'
bash: sfsfdfdff.com: Name or service not known
bash: /dev/tcp/sfsfdfdff.com/80: Invalid argument
$ echo $?
1
# Connection not established by the timeout
$ timeout 1 bash -c 'cat < /dev/null > /dev/tcp/google.com/81'
$ echo $?
124
What's happening here is tha...
scipy.misc module has no attribute imread?
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It should be Pillow instead of PIL now. Reference: pillow.readthedocs.org
– Yuchen Zhong
Nov 23 '14 at 23:45
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How to use android emulator for testing bluetooth application?
... adapter to 'Bridged'. ·
Start the VM and select 'Live CD VESA' at boot.
Now you need to find out the IP of this VM. Go to terminal in VM (use Alt+F1
& Alt+F7 to toggle) and use the netcfg command to find this.
Now you need open a command prompt and go to your android install
folder (on host)...
How do I record audio on iPhone with AVAudioRecorder?
Now that iPhone 3.0 SDK is public, I think I can ask this question for those of you that have already been playing with the 3.0 SDK. I want to record audio in my application, but I want to use AVAudioRecorder and not the older way of recording like the example SpeakHere shows. There are not any...
Is there a way to create xxhdpi, xhdpi, hdpi, mdpi and ldpi drawables from a large scale image?
...time (downside: will only work on fairly recent devices, where -xxhdpi is known).
Option #2: Use Android Asset Studio to downsample them for you.
Option #3: Automate the process within a graphics editor, per ssantos' answer.
Option #4: Script yourself a solution, using something like ImageMagick.
Op...
Check time difference in Javascript
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I never know if dates in this format will be parsed as d/m/y or m/d/y. The official formats accepted are here (whatever Date.parse() accepts is valid), developer.mozilla.org/en/JavaScript/Reference/Global_Objects/…
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browser sessionStorage. share between tabs?
...sionStorage', JSON.stringify(sessionStorage));
// the other tab should now have it, so we're done with it.
localStorage.removeItem('sessionStorage'); // <- could do short timeout as well.
} else if (event.key == 'sessionStorage' && !sessionStorage.length) {
// another tab se...
Add Keypair to existing EC2 instance
...file system (still on instance-B):
sudo umount /vol-a
sudo rmdir /vol-a
Now, back on your system with ec2-api-tools, continue moving the EBS volume back to it’s home on the original instance A and start the instance again:
ec2-detach-volume $volume
ec2-attach-volume --instance $instance_a --de...
“Eliminate render-blocking CSS in above-the-fold content”
...ly degrade user experience by showing FOUT!
– publicknowledge
Feb 1 '16 at 1:33
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show 7 more comments
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Is there a shortcut to make a block comment in Xcode?
... parameters}
return "/*\n" & (input as string) & "*/"
end run
Now you can access that service through Xcode - Services menu, or by right clicking on the selected block of code you wish to comment, or giving it a shortcut under System Preferences.
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