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Why can't C++ be parsed with a LR(1) parser?
... other information (e.g., knowledge of the type of x) must collect both in order to decide later what to do. Thus a grammar must allow this. And that makes the grammar ambiguous.
Thus pure LR parsing can't handle this. Nor can many other widely available parser generators, such as Antlr, JavaCC, ...
Python Linked List
...ite
Although doubly linked lists are famously used in Raymond Hettinger's ordered set recipe, singly linked lists have no practical value in Python.
I've never used a singly linked list in Python for any problem except educational.
Thomas Watnedal suggested a good educational resource How to Thi...
how to check the dtype of a column in python pandas
...y of the question is specific. So any other answers may be used.
But in order to fully answer the title question it should be clarified that it seems like all of the approaches may fail in some cases and require some rework. I reviewed all of them (and some additional) in decreasing of reliabilit...
Android: how to make an activity return results to the activity which calls it?
... activity that can be called from many activities, such as Sign up and Order . In the Location activity the user enters his location, so the activity Location will return this new location to that activity which called it.
...
Compare DATETIME and DATE ignoring time portion
...char(8) = CONVERT(char(8), GETDATE(), 112)
select
*
from
Sales.Orders
where
CONVERT(char(8), OrderDate, 112) = @filterDate
In a perfect world, performing any manipulation to the filtered column should be avoided because this can prevent SQL Server from using indexes efficiently. Th...
Function that creates a timestamp in c#
...give you a string like 200905211035131468, as the string goes from highest order bits of the timestamp to lowest order simple string sorting in your SQL queries can be used to order by date if you're sticking values in a database
...
`Apache` `localhost/~username/` not working
...+SymLinksIfOwnerMatch +ExecCGI
AllowOverride All
Require local
Order allow,deny
Allow from all
</Directory>
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The ALTER TABLE statement conflicted with the FOREIGN KEY constraint
...e problem was, so I'll give a layman's example. If you have a table named 'Orders' and a table named 'Customers', and you've deleted some old customers, but not their orders, you will get this error if you decide to make a foreign key from Orders.CustomerId to Customers.Id. Some orders don't have a...
How can I get column names from a table in SQL Server?
... JOIN sys.objects o ON o.object_id = c.object_id
WHERE o.type = 'U'
ORDER BY o.Name, c.Name
This gets all columns from all tables, ordered by table name and then on column name.
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How do I get user IP address in django?
... on the Internet
else:
# The client's IP address is private
# Order of precedence is (Public, Private, Loopback, None)
Advanced Usage:
Custom Header - Custom request header for ipware to look at:
i, r = get_client_ip(request, request_header_order=['X_FORWARDED_FOR'])
i, r = get_cli...