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Rails: Missing host to link to! Please provide :host parameter or set default_url_options[:host]
...default_url_options = { :host => "yourhost" }
That way, it can work in all environments and could be different from environment to environment. For example:
development.rb
config.action_mailer.default_url_options = { :host => "dev.yourhost.com" }
test.rb
config.action_mailer.default_url_...
How do you stop Console from popping up automatically in Eclipse
... make the console popup every few seconds. How do I stop it from automatically popping up and taking focus?
3 Answers
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Check difference in seconds between two times
Hi all I am currently working on a project where when a certain event happens details about the event including the time that the event occurred is added into a list array.
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XPath: How to check if an attribute exists?
...u should use a more specific expression. But with [@attributeName] you get all nodes which have that attribute.
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How to increase the gap between text and underlining in CSS
...w property text-underline-offset (as well as text-decoration-thickness) to allow control over the exact placement of an underline. As of this writing, it's an early-stage draft and has not been implemented by any browser, but it looks like it will eventually make the technique below obsolete.
Origi...
How to scroll to an element inside a div?
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This was really helpful! If you want to set the scroll multiple times you need to offset by your current scroll location. Here's how I did it in jQuery: $('#scrolling_div').scrollTop($('#scrolling_div').scrollTop() + $('#element_within_...
What is the difference between association, aggregation and composition?
... is owned by the object of it's owning class cannot live on it's own(Also called "death relationship"). It will always live as a part of it's owning object where as in Aggregation the dependent object is standalone and can exist even if the object of owning class is dead.
So in composition if ownin...
Fast way to discover the row count of a table in PostgreSQL
...of rows due to the nature of MVCC. There is a way to speed this up dramatically if the count does not have to be exact like it seems to be in your case.
Instead of getting the exact count (slow with big tables):
SELECT count(*) AS exact_count FROM myschema.mytable;
You get a close estimate like ...
How do I bind to list of checkbox values with AngularJS?
...ive the input a real value, in case the form gets submitted
traditionally
- Use `ng-checked="fruit.selected"` to have the checkbox checked based on some angular expression
(no two-way-data-binding)
- Use `ng-model="fruit.selected"` to utilize two-way-data-binding. Note that `.s...
Adding a column to a data.frame
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@RomanLuštrik, This solution can be rewritten really nicely in a single line. Using your your.df data, you can simply do your.df$group = cumsum(your.df[, 1]==1) to get your new group column.
– A5C1D2H2I1M1N2O1R2T1
Apr 16 '12 at 17:47
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