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Deleting all records in a database table
How do I delete all records in one of my database tables in a Ruby on Rails app?
7 Answers
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What are the differences between local branch, local tracking branch, remote branch and remote track
I just started using Git and I got really confused between different branches. Can anyone help me to figure out what the following branch types are?
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Unstaged changes left after git reset --hard
... It's the * text=auto directive in the gitattributes file. It automatically changes file endings, so the files will automatically be marked as "modified" when you check the status.
– Cody Django
Feb 19 '15 at 22:24
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Emacs: print key binding for a command or list all key bindings
...a command.
You are correct, C-h b (or M-x describe-bindings) will show you all bindings. C-h m (M-x describe-mode) is also handy to list bindings by mode.
You might also try C-h k (M-x describe-key) to show what command is bound to a key. For instance, on my machine save-buffers-kill-emacs isn't b...
Long vs Integer, long vs int, what to use and when?
... inherited from Object, such as hashcode. Java.util.collections methods usually use the boxed (Object-wrapped) versions, because they need to work for any Object, and a primitive type, like int or long, is not an Object.
Another difference is that long and int are pass-by-value, whereas Long and In...
How do you track record relations in NoSQL?
...pivotal tables (to add keys marking a relation between two objects) I am really stumped as to how you would be able to retrieve data in a way that would be useful for normal web pages.
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How to use gitignore command in git
...working first time on git. I have pushed my branch on github and it pushed all the library and documents into the github. Now what can I do and how can I use gitignore command to avoid the same mistake again.
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How to make a node.js application run permanently?
On a Debian server, I installed Node.js. I understand how to launch an app from putty with this command line:
19 Answers
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Script to kill all connections to a database (More than RESTRICTED_USER ROLLBACK)
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Such a nice answer for aggregating kill statements all together. I would use a cursor to kill each process, which of course is not efficient at all. The technique used in this answer is brilliant.
– Saeed Neamati
Mar 2 '14 at 6:27
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Which iomanip manipulators are 'sticky'?
... the comments below:
By Martin:
@Chareles: Then by this requirement all manipulators are sticky. Except setw which seems to be reset after use.
By Charles:
Exactly! and the only reason that setw appears to behave differently is because there are requirements on formatted output operat...