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What is the optimal length for an email address in a database?
... then you can/must use a VARCHAR(254) to store an email address.
Note: In MySQL at least, a column declared as VARCHAR whit less or equal than 255 octets will be all stored as 1 byte + length (the 1 is to store the length) so no space is gained if used a lower limit.
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Java: Subpackage visibility?
...o this in IntelliJ, my source tree looks like this:
src // source root
- odp
- proj // .java source here
- test // test root
- odp
- proj // JUnit or TestNG source here
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How to split a dos path into its components in Python
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This doesn't seem to work for path = root. In that case, the result of path.split is ['','']. In fact in general, this split() solution gives a leftmost directory with empty-string name (which could be replaced by the appropriate slash). The core problem is th...
How can I join multiple SQL tables using the IDs?
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Not the answer you're looking for? Browse other questions tagged mysql sql join or ask your own question.
How to install a specific version of a ruby gem?
...sudo to work with RVM gems. When you do
sudo you are running commands as root, another user in another shell
and hence all of the setup that RVM has done for you is ignored while
the command runs under sudo (such things as GEM_HOME, etc...). So to
reiterate, as soon as you 'sudo' you are run...
Add only non-whitespace changes
... if you have a handy alias to execute a bash command in the working tree's root. The incorrect formulation is:
sh = !bash -c '"$@"' -
While the correct one is:
sh = !bash -c '\"$@\"' -
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Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
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Note, MySQL doesn't allow default values on TEXT/BLOB columns. Otherwise this is the ideal solution
– Andrew Vit
Mar 20 '13 at 18:35
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Sending event when AngularJS finished loading
...compile function do whatever you want to do. :) Place the directive on the root element of your app. You can call the directive something like myOnload and use it as an attribute my-onload. The compile function will execute once the template has been compiled (expressions evaluated and sub-templates...
How can I have ruby logger log output to stdout as well as file?
...can do:
# config/environment/production.rb
file_logger = Logger.new(Rails.root.join("log/alternative-output.log"))
config.logger.extend(ActiveSupport::Logger.broadcast(file_logger))
Or if you're on Rails 3, you can backport it:
# config/initializers/alternative_output_log.rb
# backported from r...
PostgreSQL create table if not exists
In a MySQL script you can write:
6 Answers
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