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How many characters can UTF-8 encode?
...7,483,648 characters
However, RFC 3629 restricted the possible values, so now we're capped at 4 bytes, which gives us
221 = 2,097,152 characters
Note that a good chunk of those characters are "reserved" for custom use, which is actually pretty handy for icon-fonts.
* Wikipedia used show a table ...
Volley Android Networking Library
...
The Volley library is now published by the Android Open Source Project:
dependencies {
implementation 'com.android.volley:volley:1.1.0'
}
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UITextField - capture return button event
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@Praxiteles This can now be done in storyboard without requiring delegation please check answer below.
– Blake Lockley
Feb 27 '18 at 23:20
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How to calculate the angle between a line and the horizontal axis?
...aX*deltaX+deltaY*deltaY)), unless the length is 0.
After that, deltaX will now be the cosine of the angle between the vector and the horizontal axis (in the direction from the positive X to the positive Y axis at P1).
And deltaY will now be the sine of that angle.
If the vector's length is 0, it won...
Cannot download Docker images behind a proxy
...tory for the Docker service:
mkdir /etc/systemd/system/docker.service.d
Now create a file called /etc/systemd/system/docker.service.d/http-proxy.conf that adds the HTTP_PROXY environment variable:
[Service]
Environment="HTTP_PROXY=http://proxy.example.com:80/"
If you have internal Docker regis...
Call Go functions from C
...me progress info to the user whenever it gets called. Since it has a well known signature, we can assign it its own type:
type ProgressHandler func(current, total uint64, userdata interface{}) int
This handler takes some progress info (current number of files received and total number of files) a...
Is there a null-coalescing (Elvis) operator or safe navigation operator in javascript?
...ame = (user && user.address && user.address.street) || "Unknown Street";
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How does MySQL process ORDER BY and LIMIT in a query?
... we are not satisfied with that, so we ask mysql to sort it one more time. Now we have the newest result on the last row.
select t.article
from
(select article, publish_date
from table1
order by publish_date desc limit 10) t
order by t.publish_date asc;
If you need all columns,...
How can I generate a unique ID in Python? [duplicate]
...uction code (and about to roll out to more uses of it in a newer release). Now I'm scared!
– Matthew Schinckel
Nov 6 '10 at 7:38
2
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Building a notification system [closed]
...cebook style notification system for our page (social gaming type) and I'm now researching what would be the best way to design such system. I'm not interested in how to push notifications to the user or anything like that (for now even). I am researching how to build the system on the server (how t...