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What does “fragment” mean in ANTLR?
...tlr4 references book :
Rules prefixed with fragment can be called only from other lexer rules; they are not tokens in their own right.
actually they'll improve readability of your grammars.
look at this example :
STRING : '"' (ESC | ~["\\])* '"' ;
fragment ESC : '\\' (["\\/bfnrt] | UNICODE) ...
How to increment datetime by custom months in python without using library [duplicate]
...need to modify my code to use datetime and copy hours, minutes and seconds from the source to the result.
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How to determine if binary tree is balanced?
It's been a while from those school years. Got a job as IT specialist at a hospital. Trying to move to do some actual programming now. I'm working on binary trees now, and I was wondering what would be the best way to determine if the tree is height-balanced.
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Repository Pattern Step by Step Explanation [closed]
...ects are persisted. All of the knowledge of persistence, including mapping from tables to objects, is safely contained in the repository.
Very often, you will find SQL queries scattered in the codebase and when you come to add a column to a table you have to search code files to try and find usages...
How to concatenate properties from multiple JavaScript objects
...ssign() method is used to copy the values of all enumerable own properties from one or more source objects to a target object. It will return the target object.
MDN documentation on Object.assign()
var o1 = { a: 1 };
var o2 = { b: 2 };
var o3 = { c: 3 };
var obj = Object.assign({}, o1, o...
MVC pattern on Android
...e (I believe many Android devs see it that way) why not talk to your views from the Activity?
– user1545072
Oct 1 '13 at 7:19
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Convert nested Python dict to object?
...ider whether the namedtuple data structure suits your needs:
>>> from collections import namedtuple
>>> MyStruct = namedtuple('MyStruct', 'a b d')
>>> s = MyStruct(a=1, b={'c': 2}, d=['hi'])
>>> s
MyStruct(a=1, b={'c': 2}, d=['hi'])
>>> s.a
1
>>>...
WebAPI Multiple Put/Post parameters
...am trying to post multiple parameters on a WebAPI controller. One param is from the URL, and the other from the body. Here is the url:
/offers/40D5E19D-0CD5-4FBD-92F8-43FDBB475333/prices/
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When do items in HTML5 local storage expire?
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@AndresRiofrio I can't find any documentation from Mozilla or Microsoft or the W3C that stipulates any sort of mandatory expiration. Thus I think the answer is that yes, the user agent is supposed to keep stored stuff around forever, or until the user explicitly requests...
Pointers in C: when to use the ampersand and the asterisk?
...e converted to pointers transparently. This highlights another way to get from a pointer to a value, I'll add it to the explanation above.
– Dan Olson
Jan 19 '10 at 18:58
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