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What does map(&:name) mean in Ruby?
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It's shorthand for tags.map(&:name.to_proc).join(' ')
If foo is an object with a to_proc method, then you can pass it to a method as &foo, which will call foo.to_proc and use that as the method's block.
The Symbol#to_proc method was originally added by ActiveSupport but has...
What's a “static method” in C#?
...technical limitation that prevents calling a static method on an instance? If the compiler would allow it, what is the danger of it being accessible?
– kroonwijk
Sep 12 '11 at 19:09
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How to Add a Dotted Underline Beneath HTML Text
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If the content has more than 1 line, adding a bottom border won't help. In that case you'll have to use,
text-decoration: underline;
text-decoration-style: dotted;
If you want more breathing space in between the text and t...
You have already activated rake 0.9.0, but your Gemfile requires rake 0.8.7
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First, check to make sure that rake is mentioned in your Gemfile. If it's not, add it, and specify the version "you already activated".
Then, you'll need to tell bundle to update the rake version it's using for your app:
bundle update rake
It'll update your Gemfile.lock for you.
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Create a matrix of scatterplots (pairs() equivalent) in ggplot2
...ceting you have the same x and y on each sub-plot; with pairs, you have a different x on each column, and a different y on each row.
– naught101
Aug 21 '12 at 2:14
29
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How do I create a new class in IntelliJ without using the mouse?
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If you are already in the Project View, press Alt+Insert (New) | Class. Project View can be activated via Alt+1.
To create a new class in the same directory as the current one use Ctrl+Alt+Insert (New...).
You can also do i...
Where can I find a list of scopes for Google's OAuth 2.0 API? [closed]
The example I'm working with specifies the scope in the OAuth request as:
scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.email+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.profile
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CSS :not(:last-child):after selector
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If it's a problem with the not selector, you can set all of them and override the last one
li:after
{
content: ' |';
}
li:last-child:after
{
content: '';
}
or if you can use before, no need for last-child
li+li:before...
When would you use a List instead of a Dictionary?
What is the difference between a List of KeyValuePair and a Dictionary for the same types? Is there an appropriate time to use one or the other?
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PostgreSQL - fetch the row which has the Max value for a column
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On a table with 158k pseudo-random rows (usr_id uniformly distributed between 0 and 10k, trans_id uniformly distributed between 0 and 30),
By query cost, below, I am referring to Postgres' cost based optimizer's cost estimate (with Postgres' default xxx_cost values), which ...