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Reload django object from database
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Couldn't find details in the docs, but it properly throws a DoesNotExist exception if the underlying object was deleted when calling refresh_from_db. FYI.
– Tim Tisdall
Jan 17 at 19:26
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What is the 'cls' variable used for in Python classes?
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It's used in case of a class method. Check this reference for further details.
EDIT: As clarified by Adrien, it's a convention. You can actually use anything but cls and self are used (PEP8).
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What's the difference between and
...and for <? extends Object>.
You may read below shared link for more details.
<?>
"?" denotes any unknown type, It can represent any Type at in code for. Use this wildcard if you are not sure about Type.
ArrayList<?> unknownList = new ArrayList<Number>(); //can accept o...
What is the main difference between PATCH and PUT request?
...used to update some portion of existing resource.
For Example:
Customer Details:
// This is just a example.
firstName = "James";
lastName = "Anderson";
email = "email@domain.com";
phoneNumber = "+92 1234567890";
//..
When we want to update to entire record ? we have to use Http PUT verb for t...
Best practices for reducing Garbage Collector activity in Javascript
...allocation. It's called the Memory Timeline. This article describes some details. I suppose this is what you're talking about re the "sawtooth"? This is normal behavior for most GC'ed runtimes. Allocation proceeds until a usage threshold is reached triggering a collection. Normally there are d...
Automatically open Chrome developer tools when new tab/new window is opened
...re, feel free to Star this Chromium bug: code.google.com/p/chromium/issues/detail?id=410958
– phsource
Oct 15 '14 at 21:19
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How to list records with date from the last 10 days?
...E - INTERVAL '10 days');
The operators/functions above are documented in detail:
CURRENT_DATE
INTERVAL '10 days'
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How to extract public key using OpenSSL?
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For those interested in the details - you can see what's inside the public key file (generated as explained above), by doing this:-
openssl rsa -noout -text -inform PEM -in key.pub -pubin
or for the private key file, this:-
openssl rsa -noout -text ...
Why is \r a newline for Vim?
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:help NL-used-for-Nul
Technical detail:
<Nul> characters in the file are stored as <NL> in memory. In the display
they are shown as "^@". The translation is done when reading and writing
files. To match a <Nul> with a search pat...
Why am I getting error for apple-touch-icon-precomposed.png
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I found a nice article that details everything I wanted to know (and more): mathiasbynens.be/notes/touch-icons
– Alexis
May 22 '13 at 15:02
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