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What's the difference between an exclusive lock and a shared lock?
... readers when the lock chooses who gets the lock next (when it is unlocked by its current owner). This is about policy.
– ArjunShankar
Jun 22 '16 at 12:31
...
Stateless vs Stateful - I could use some concrete information
...of attributes in coding. Example: I've heard that BL-classes are stateless by design, entity classes (or atleast that's what I call them - like Person(id, name, ..)) are stateful, etc.
...
Class method differences in Python: bound, unbound and static
... instance properties.
3
>>> Class.c # a.c above was passed by value and not by reference.
2
>>> a.c
2
>>> a.c = 5 # The connection between the instance
>>> Class.c # and its class is weak as seen here.
2
>>> Class.class_method()
3
>...
Share cookie between subdomain and domain
...ie like the second example above from mydomain.com, it would be accessible by subdomain.mydomain.com, and vice versa. This can also be used to allow sub1.mydomain.com and sub2.mydomain.com to share cookies.
See also:
www vs no-www and cookies
cookies test script to try it out
...
SQL Server principal “dbo” does not exist,
...
I resolved this issue by setting database owner. My database did not have had any owner before this issue. Execute this command in your database to set owner to sysadmin account:
use [YourDatabaseName] EXEC sp_changedbowner 'sa'
...
Looping over arrays, printing both index and value
...baz
Explained
printf "%s\n" "${!foo[@]}" will print all keys separated by a newline,
printf "%s\n" "${foo[@]}" will print all values separated by a newline,
paste <(cmd1) <(cmd2) will merge output of cmd1 and cmd2 line by line.
Tunning
This could be tunned by -d switch:
paste -d : <...
What does “to stub” mean in programming?
...le replacement for an Existing Dependency (or collaborator)
in the system. By using a stub, you can test your code without
dealing with the dependency directly.
External Dependency - Existing Dependency:
It is an object in your system that your code
under test interacts with and over which you have...
Is there a way to auto-adjust Excel column widths with pandas.ExcelWriter?
...
Inspired by user6178746's answer, I have the following:
# Given a dict of dataframes, for example:
# dfs = {'gadgets': df_gadgets, 'widgets': df_widgets}
writer = pd.ExcelWriter(filename, engine='xlsxwriter')
for sheetname, df in df...
Git branch diverged after rebase
...working with in a team when your push may overwrite any recent work pushed by others. Am I right?
– Hari Krishna Ganji
Nov 23 '14 at 13:56
...
How to delete migration files in Rails 3
...le or columns.
Another great reference for migrations is: http://guides.rubyonrails.org/migrations.html
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