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Swift - How to convert String to Double
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ohai, Jarsen. One downside to this approach is that it will not fail if the string isn't a valid double. Instead you will just get 0.0. That is, the result of - [NSString doubleValue] is Double in swift as apposed to Double? (Optional<D...
How to open a web server port on EC2 instance
...if you're dealing with Windows EC2 instance. That solution along with this one worked for me.
– Utkarsh Gupta
Oct 10 '19 at 15:51
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Allow user to set up an SSH tunnel, but nothing else
..."/bin/echo do-not-send-commands" echoes back "do-not-send-commands" if someone or something does manage to send commands to the host via ssh -T or otherwise.
From a recent Ubuntu man sshd, authorized_keys / command is described as follows:
command="command"
Specifies that the c...
How can I create a “Please Wait, Loading…” animation using jQuery?
...t;
The CSS
Next let's give it some flair:
/* Start by setting display:none to make this hidden.
Then we position it in relation to the viewport window
with position:fixed. Width, height, top and left speak
for themselves. Background we set to 80% white with
our animation centered, an...
How to prevent errno 32 broken pipe?
...t this is much more obvious on physically remote connections than on local ones, so conditions like this can be hard to reproduce on a local workstation. Specifically, loopback connections on a single machine are often almost synchronous.
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How to change the playing speed of videos in HTML5?
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@Sushan .querySelector returns the first matching one. You can use .querySelectorAll, but you need to iterate through them instead of directly using the code in these answers.
– leewz
Jul 6 '17 at 5:01
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How can I create a keystore?
...even don't have Build > Generate Signed Bundle/APK...! Because if you clone a project and try to compile it, it will require keystore.jks, but to create keystore.jks you have to build gradle files in order to enable the menu! To overcome this obstacle, you should edit build.gradle and comment sig...
How to disable/enable the sleep mode programmatically in iOS?
...ation. It will come in handy. I was wondering if disabling sleep mode in one app will affect the entire device. Like if I disable it in my app and then exit the app, will it still be disabled after the app exits? Do I need to check whether it's active or not, and then reenable it on the way out?...
Iterate through the fields of a struct in Go
... answered Sep 21 '13 at 0:36
nemonemo
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How to know what the 'errno' means?
...rieve a complete listing of errno values on your system with the following one-liner:
cpp -dM /usr/include/errno.h | grep 'define E' | sort -n -k 3
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