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What is the difference between functional and non functional requirement? [closed]
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Functional requirements specifies a function that a system or system component must be able to perform. It can be documented in various ways. The most common ones are written descriptions in documents, and use cases.
Use cases can be textual enumeration lists as well as diagrams, describing user ...
Why NSUserDefaults failed to save NSMutableDictionary in iOS?
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I found out one alternative, before save, I encode the root object (NSArray object) using NSKeyedArchiver, which ends with NSData. Then use UserDefaults save the NSData.
When I need the data, I read out the NSData, and use NSKeyedUnarc...
How can I include a YAML file inside another?
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Your question does not ask for a Python solution, but here is one using PyYAML.
PyYAML allows you to attach custom constructors (such as !include) to the YAML loader. I've included a root directory that can be set so that this solution supports relative and absolute file references.
C...
Simple Getter/Setter comments
...ay which describes a getter/setter better than just the method signature alone. Yes, there are cases where a programmer is lazy and just repeats the method signature in the comment, but I think that generally speaking, it is a helpful behavior to force.
– Matt Vukas
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Python `if x is not None` or `if not x is None`?
I've always thought of the if not x is None version to be more clear, but Google's style guide and PEP-8 both use if x is not None . Is there any minor performance difference (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convent...
What is the difference between is_a and instanceof?
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It's no longer deprecated as of 5.3, so there's no worry there.
There is one difference however. is_a being a function takes an object as parameter 1, and a string (variable, constant, or literal) as parameter 2. So:
is_a($object, $string); // <- Only way to call it
instanceof takes an obje...
“Origin null is not allowed by Access-Control-Allow-Origin” error for request made by application ru
...s where the Access-Control-Allow-Origin header came in.
I believe you mentioned you were running it from a file:// URL. There are two ways for CORS headers to signal that a cross-domain XHR is OK. One is to send Access-Control-Allow-Origin: * (which, if you were reaching Flickr via $.get, they must ...
How can you set class attributes from variable arguments (kwargs) in python
... here do not cover a good way to initialize all allowed attributes to just one default value.
So, to add to the answers given by @fqxp and @mmj:
class Myclass:
def __init__(self, **kwargs):
# all those keys will be initialized as class attributes
allowed_keys = set(['attr1','at...
How big can a user agent string get?
...aximum length in your INSERTer to keep UA strings it under 4KB. Unless someone is emailing you in the user-agent, it should not go over that length.
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What are the differences between JSON and JSONP?
...usly set up a function called func, then that function will be called with one argument, which is the JSON data, when the script file is done loading. This is usually used to allow for cross-site AJAX with JSON data. If you know that example.com is serving JSON files that look like the JSONP example...