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What does “hashable” mean in Python?
... of contiguous memory locations.
So, you can instead use an array of size 100, and use a hash function to map a set of values to same indices, and these values can be stored in a linked list. This provides a performance similar to an array.
Now, a hash function can be as simple as dividing the nu...
Animate scrollTop not working in firefox
...on would be to set the following styles:
html { overflow: hidden; height: 100%; }
body { overflow: auto; height: 100%; }
I would assume that the JS solution would be least invasive.
Update
A lot of the discussion below focuses on the fact that animating the scrollTop of two elements would cau...
Object.watch() for all browsers?
...eturn true;
}
};
let person = new Proxy({}, validator);
person.age = 100;
console.log(person.age); // 100
person.age = 'young'; // Throws an exception
person.age = 300; // Throws an exception
Old answer from 2015
You could have used Object.observe() from ES7. Here's a polyfill. But Object.o...
How can I merge two hashes without overwritten duplicate keys in Ruby?
...hash. Here's the pure Ruby solution without Rails:
options = { "a" => 100, "b" => 200 }
defaults = { "b" => 254, "c" => 300 }
options.merge!(defaults.select{ |k,_| not options.has_key? k })
# output
# => {"a"=>100, "b"=>200, "c"=>300}
Or if the key is present, but cont...
View differences of branches with meld?
...
Starting with git v1.7.11, you can use git difftool --dir-diff to perform a directory diff. Which works quite well with meld wihout https://github.com/wmanley/git-meld scripts.
Configure git
git config --global diff.tool meld
Use it
git d...
Get environment variable value in Dockerfile
...
ARG is available from docker v1.9 onwards.
– Synesso
May 20 '16 at 6:02
...
How to duplicate sys.stdout to a log file?
...
+100
Since you're comfortable spawning external processes from your code, you could use tee itself. I don't know of any Unix system call...
pretty-print JSON using JavaScript
...
+100
Pretty-printing is implemented natively in JSON.stringify(). The third argument enables pretty printing and sets the spacing to use:...
No serializer found for class org.hibernate.proxy.pojo.javassist.Javassist?
...ng.jackson.serialization.fail-on-empty-beans=false
I'm using Spring Boot v1.3 with Hibernate 4.3
It now serializes the entire object and nested objects.
EDIT: 2018
Since this still gets comments I'll clarify here. This absolutely only hides the error. The performance implications are there. At ...
Call a REST API in PHP
...nse into a native PHP object.
$uri = "https://www.googleapis.com/freebase/v1/mqlread?query=%7B%22type%22:%22/music/artist%22%2C%22name%22:%22The%20Dead%20Weather%22%2C%22album%22:%5B%5D%7D";
$response = \Httpful\Request::get($uri)->send();
echo 'The Dead Weather has ' . count($response->body...