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How to sort an array of hashes in ruby
...
If you have Nested Hash (Hash inside a hash format) as Array elements (a structure like the following) and want to sort it by key (date here)
data = [
{
"2018-11-13": {
"avg_score": 4,
"avg_duration": 29.24
}
...
How can I set Image source with base64
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Try using setAttribute instead:
document.getElementById('img')
.setAttribute(
'src', 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=='
);
Real answer:
(And make sure you...
Should I avoid 'async void' event handlers?
I know it is considered generally a bad idea to use fire-and-forget async void methods to start tasks, because there is no track of the pending task and it is tricky to handle exceptions which might be thrown inside such a method.
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How can I expose more than 1 port with Docker?
...ost_port>:<container_port>
To expose multiple ports, simply provide multiple -p arguments:
docker run -p <host_port1>:<container_port1> -p <host_port2>:<container_port2>
share
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What is mattr_accessor in a Rails module?
...or generates getter/setter methods for instances, cattr/mattr_accessor provide getter/setter methods at the class or module level. Thus:
module Config
mattr_accessor :hostname
mattr_accessor :admin_email
end
is short for:
module Config
def self.hostname
@hostname
end
def self.host...
Bootstrap 3.0 - Fluid Grid that includes Fixed Column Sizes
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There's really no easy way to mix fluid and fixed widths with Bootstrap 3. It's meant to be like this, as the grid system is designed to be a fluid, responsive thing. You could try hacking something up, but it would go against what the Responsive Grid system i...
What exactly is Python multiprocessing Module's .join() Method Doing?
...iprocessing docs as it should be, but it is mentioned in the Programming Guidelines section:
Remember also that non-daemonic processes will be automatically be
joined.
You can override this behavior by setting the daemon flag on the Process to True prior to starting the process:
p = Process...
Is there any way to view the currently mapped keys in Vim?
...to what shortcut and viceversa, but if you want to search some keys and avoid temp files whenever you need to search mappings, take a look to scriptease and :Verbose command.
It is a wrapper on :verbose to show result in a preview window.
this way you can search whatever you want inside results ...
How to undo the effect of “set -e” which makes bash exit immediately if any command fails?
...corresponding manual page (faqs.org/docs/bashman/bashref_56.html) which I didn't read to the end.
– Tianyi Cui
Aug 18 '10 at 22:22
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Scaling Node.js
I'm fairly new to large-scale server-side development. I want to write a server using Node.js, but before I forge ahead I'd like to know what the general principles are for scaling node up to, say, 20 queries per second.
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