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Difference between rake db:migrate db:reset and db:schema:load
...:drop, db:setup
db:migrate:reset does db:drop, db:create, db:migrate
Typically, you would use db:migrate after having made changes to the schema via new migration files (this makes sense only if there is already data in the database). db:schema:load is used when you setup a new instance of your ap...
Why should I use core.autocrlf=true in Git?
...hat I know already contains some files with CRLF line-endings. As far as I can tell, there are two ways to deal with this:
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Scala: What is a TypeTag and how do I use it?
...s is that they somehow replaced Manifests. Information on the Internet is scarce and doesn't provide me with a good sense of the subject.
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How to export revision history from mercurial or git to cvs?
...history to cvs. We don't have write access to the project's cvs repo so we can't commit very frequently. What tool can we use to export our revision history to cvs? Currently we were thinking of using git or mercurial but we could use another distributed vcs if it could make the export easier.
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NoSql vs Relational database
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Not all data is relational. For those situations, NoSQL can be helpful.
With that said, NoSQL stands for "Not Only SQL". It's not intended to knock SQL or supplant it.
SQL has several very big advantages:
Strong mathematical basis.
Declarative syntax.
A well-known language...
Java8: Why is it forbidden to define a default method for a method from java.lang.Object
...ods declared in java.lang.Object may not be default ed. Why is this the case?
5 Answers
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Why does SIGPIPE exist?
From my understanding, SIGPIPE can only occur as the result of a write() , which can (and does) return -1 and set errno to EPIPE ... So why do we have the extra overhead of a signal? Every time I work with pipes I ignore SIGPIPE and have never felt any pain as a result, am I missing somethin...
Best practices for reducing Garbage Collector activity in Javascript
I have a fairly complex Javascript app, which has a main loop that is called 60 times per second. There seems to be a lot of garbage collection going on (based on the 'sawtooth' output from the Memory timeline in the Chrome dev tools) - and this often impacts the performance of the application.
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CoffeeScript, When to use fat arrow (=>) over arrow (->) and vice versa
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No, that's not the rule I would use.
The major use-case I've found for the fat-arrow in defining methods is when you want to use a method as a callback and that method references instance fields:
class A
constructor: (@msg) ->
thin: -> alert @msg
fat: => aler...
What is the difference between native code, machine code and assembly code?
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The terms are indeed a bit confusing, because they are sometimes used inconsistently.
Machine code: This is the most well-defined one. It is code that uses the byte-code instructions which your processor (the physical piece of metal that does the actual work) unde...