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When to use a View instead of a Table?
When should a View actually be used over an actual Table? What gains should I expect this to produce?
8 Answers
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How to “hibernate” a process in Linux by storing its memory to disk and restoring it later?
...ate' a process in linux?
Just like 'hibernate' in laptop, I would to write all the memory used by a process to disk, free up the RAM. And then later on, I can 'resume the process', i.e, reading all the data from memory and put it back to RAM and I can continue with my process?
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Why does an SSH remote command get fewer environment variables then when run manually? [closed]
...e -i option. PS1 is
set and $- includes i if bash is interactive, allowing a
shell script or a startup file to test this state.
The following paragraphs describe how bash executes its
startup files. If any of the files exist but cannot be
read, bash rep...
SHA512 vs. Blowfish and Bcrypt [closed]
...ome on-board RAM.
Note: bcrypt is an algorithm that uses Blowfish internally. It is not an encryption algorithm itself. It is used to irreversibly obscure passwords, just as hash functions are used to do a "one-way hash".
Cryptographic hash algorithms are designed to be impossible to reverse. In...
What are the security risks of setting Access-Control-Allow-Origin?
I recently had to set Access-Control-Allow-Origin to * in order to be able to make cross-subdomain ajax calls.
Now I can't help but feel that I'm putting my environment to security risks.
Please help me if I'm doing it wrong.
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How do I remove the passphrase for the SSH key without having to create a new key?
...ch can be left blank to have no passphrase).
If you would like to do it all on one line without prompts do:
$ ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]
Important: Beware that when executing commands they will typically be logged in your ~/.bash_history file (or similar...
What's the difference between Application.ThreadException and AppDomain.CurrentDomain.UnhandledExcep
...f you don't override it, the user will get a ThreadExceptionDialog. Which allows him to ignore the exception and keep running your program. Not a great idea btw.
You can disable this behavior by calling Application.SetUnhandledExceptionMode() in the Main() method in Program.cs. Without that back...
What do the arrow icons in Subclipse mean?
...→ Ignored Resources.
- A file not under version control. These are typically new files that you have not committed to the repository yet.
- A versioned file that needs to be added to the remote repository. These are typically files you have either renamed, or moved to a different directory.
- A...
Remove Select arrow on IE
...nt.
Examples of Custom Cross Browser Drop-down in action: check them with all your browsers to see the cross-browser feature.
Anyway, let's start with the modern browsers and then we will see the solution for the older ones.
Drop-down Arrow for Chrome, Firefox, Opera, Internet Explorer 10+
For t...
How to check whether a pandas DataFrame is empty?
...[8]: len(df1.columns)
Out[8]: 0
In [9]: len(df2.columns)
Out[9]: 2
Critically, while the second dataframe df2 contains no data, it is not completely empty because it returns the amount of empty columns that persist.
Why it matters
Let's add a new column to these dataframes to understand the implic...