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What is the difference between save and export in Docker?
...e will have layer and history information, so larger.
If giving this to a customer, the Q is do you want to keep those layers or not?
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C++ templates that accept only certain types
...nd std::enable_if:
(static_assert can be removed, the above classes can be custom-implemented or used from boost if we cannot reference type_traits)
#include <type_traits>
#include <list>
class Base {};
class Derived: public Base {};
#if 0 // wrapper
template <class T> class M...
How to expire session due to inactivity in Django?
...quest/response cycle in Django. It was very helpful.
I was about to apply custom middleware into my code following top answer in here. But I was still little bit suspicious because best answer in here was edited in 2011. I took more time to search little bit from recent search result and came up wi...
How to vertically center a container in Bootstrap?
... <p><strong>Collaborate</strong><br>With Customers, Partners and Co-Workers.</p>
</li>
<a href="pricing-and-signup.html" class="btn-primary btn h2 lightBlue get-Started-btn">GET STARTED</a>
<h6 class="get-S...
Applying a git post-commit hook to all current and future repos
...d then your own content in hooks/post-commit and anything else you want to customize.
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400 vs 422 response to POST of data
...or not).
If, on the other hand, the request was sent with a more specific custom Content Type like application/vnd.mycorp.mydatatype+json that, perhaps, specifies exactly what fields are expected, then I would say that the request could easily be syntactically invalid, hence the 400 response.
In t...
@RequestBody and @ResponseBody annotations in Spring
...quest was generated. Both things will be mapped easily without writing any custom parser etc.
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When do Java generics require
...The example I gave is contrived to use standard JDK classes rather than my custom classes, but in this case the class is actually instantiated via reflection and used based on the key. (A distributed app where the client doesn't have the server classes available, just the key of which class to use t...
WebSockets vs. Server-Sent events/EventSource
...ntages of SSE over Websockets:
Transported over simple HTTP instead of a custom protocol
Can be poly-filled with javascript to "backport" SSE to browsers that do not support it yet.
Built in support for re-connection and event-id
Simpler protocol
No trouble with corporate firewalls doing packet in...
Modifying a query string without reloading the page
...
I want to improve Fabio's answer and create a function which adds custom key to the URL string without reloading the page.
function insertUrlParam(key, value) {
if (history.pushState) {
let searchParams = new URLSearchParams(window.location.search);
searchParams.set(key...