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django admin - add custom form fields that are not part of the model
... that based on these fields values I will build the long string expression and save it in the relevant model field.
5 Answe...
Why use symbols as hash keys in Ruby?
... basically "immutable strings" .. that means that they can not be changed, and it implies that the same symbol when referenced many times throughout your source code, is always stored as the same entity, e.g. has the same object id.
Strings on the other hand are mutable, they can be changed anytim...
Does const mean thread-safe in C++11?
...ad-safe in C++11. Is that true?
It is somewhat true...
This is what the Standard Language has to say on thread-safety:
[1.10/4]
Two expression evaluations conflict if one of them modifies a memory location (1.7) and the other one accesses or modifies the same memory location.
[1.10/21]
The executi...
How can I recover a lost commit in Git?
...reflog is your friend. Find the commit that you want to be on in that list and you can reset to it (for example:git reset --hard e870e41).
(If you didn't commit your changes... you might be in trouble - commit early, and commit often!)
...
Nested attributes unpermitted parameters
...bject also belongs to a Person . I want a form that can create the Bill and its children Dues all in one page. I am trying to create a form using nested attributes, similar to ones in this Railscast .
...
Do I need a Global.asax.cs file at all if I'm using an OWIN Startup.cs class and move all configurat
Let's say for example in a brand new ASP.NET MVC 5 application made from the MVC with Individual Accounts template, if I delete the Global.asax.cs class and move it's configuration code to Startup.cs Configuration() method as follow, what are the downsides?
...
In git how is fetch different than pull and how is merge different than rebase?
I just cant understand this. I been reading a lot on the web and books and something is just not staying in my head. Can someone please give me the dummy version of the following:
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What happens if you static_cast invalid value to enum class?
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What is color set to according to the standard?
Answering with a quote from the C++11 and C++14 Standards:
[expr.static.cast]/10
A value of integral or enumeration type can be explicitly converted to an enumeration type. The value is unchanged if the origina...
What's the idiomatic syntax for prepending to a short python list?
... explanation for the missing list.prepend() . Assuming my list is short and performance concerns are negligible, is
4 A...
Deserializing JSON Object Array with Json.net
...operty("last_name")]
public string Lastname { get; set; }
...
}
And you can deserialize your json easily :
JsonConvert.DeserializeObject<List<CustomerJson>>(json);
Hope it helps !
Documentation: Serializing and Deserializing JSON
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