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What are some (concrete) use-cases for metaclasses?
... evaluate the class body into a mapping other than a dict, thus supporting ordered attributes, overloaded attributes, and other wicked cool stuff:
import collections
class Metaclass(type):
@classmethod
def __prepare__(meta, name, bases, **kwds):
return collections.OrderedDict()
...
Reordering arrays
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Thanks, @CMS. If I swap mean's don't want to replace the order...For Example, If I select the 3rd object to 1 st position I want to swap 1 as a 2 and 2 as a 3 as 1
– Peri
Aug 2 '18 at 6:41
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Joining three tables using MySQL
...ER JOIN bridge b ON s.id = b.sid
INNER JOIN course c ON b.cid = c.id
ORDER BY s.name
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Is it possible for intellij to organize imports the same way as in Eclipse?
...ly IDEA user. This creates a lot of noise from imports rearrangements. The order in which eclipse imports is: Java, Javax, Org, Com, everything else in alphabetical order. Is it possible to configure IDEA to follow these rules?
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RE error: illegal byte sequence on Mac OS X
...feedback. stackoverflow.com/a/35046218/9636
– Heath Borders
Jan 27 '16 at 19:22
LC_CTYPE=C sed 's/.*/&/' <<&...
Sorting arraylist in alphabetical order (case insensitive)
...ich contains names of people. I want to sort the arraylist in alphabetical order.
8 Answers
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Find all tables containing column with specified name - MS SQL Server
...ables t ON c.object_id = t.object_id
WHERE c.name LIKE '%MyName%'
ORDER BY TableName
,ColumnName;
Search Tables & Views:
SELECT COLUMN_NAME AS 'ColumnName'
,TABLE_NAME AS 'TableName'
FROM INFORMATION_SCHEMA.COLUMNS
WHERE COLUMN_NAME LIKE ...
Compare two files line by line and generate the difference in another file
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What does "sorted" mean? That the lines have the same order? Then it's probably fine for most use cases - as in, checking for what lines have been added by comparing with a backed-up older version. If newly added lines cannot be between the existing lines, that's more of an issu...
What is the best way to iterate over a dictionary?
...is completely undeserving of so many upvotes. A dictionary has no implicit order, so using .ElementAt in this context might lead to subtle bugs. Far more serious is Arturo's point above. You'll be iterating the dictionary dictionary.Count + 1 times leading to O(n^2) complexity for an operation that ...
Difference between volatile and synchronized in Java
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The first has to do with controlling when code executes (including the order in which instructions are executed) and whether it can execute concurrently, and the second to do with when the effects in memory of what has been done are visible to other threads. Because each CPU has several levels ...