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Do rails rake tasks provide access to ActiveRecord models?
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namespace :test do
task :new_task => :environment do
puts Parent.all.inspect
end
end
Notice the => :environment dependency added to the task
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Really weird eclipse keyboard behavior/bug?
I am using Helios on Mac Snow Leopard. I don't know why but all of a sudden my arrow keys and delete button start not working only on Eclipse (so Eclipse ignores them) but the rest of the buttons works just fine. There is no exception/error thrown anywhere on the screen. I don't exactly know how to ...
How to decide when to use Node.js?
...marizing what's awesome about Node.js. My feeling is that Node.js is especially suited for applications where you'd like to maintain a persistent connection from the browser back to the server. Using a technique known as "long-polling", you can write an application that sends updates to the user in ...
Accept server's self-signed ssl certificate in Java client
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You have basically two options here: add the self-signed certificate to your JVM truststore or configure your client to
Option 1
Export the certificate from your browser and import it in your JVM truststore (to establish a chain of trus...
“Undefined reference to” template class constructor [duplicate]
...nswers and your choice will depend on context. The common answer is to put all the implementation in the header file, but there's another approach will will be suitable in some cases. The choice is yours.
The code in a template is merely a 'pattern' known to the compiler. The compiler won't compile...
Difference between .on('click') vs .click()
....on over .click because the former can use less memory and work for dynamically added elements.
Consider the following html:
<html>
<button id="add">Add new</button>
<div id="container">
<button class="alert">alert!</button>
</div>
<...
Finding all possible permutations of a given string in python
I have a string. I want to generate all permutations from that string, by changing the order of characters in it. For example, say:
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Remove directory from remote repository after adding them to .gitignore
...h to rewrite the history - there is a helpful guide to that here.
Additionally, note the output from git rm -r --cached some-directory will be something like:
rm 'some-directory/product/cache/1/small_image/130x130/small_image.jpg'
rm 'some-directory/product/cache/1/small_image/135x/small_image.jpg...
Invoke a callback at the end of a transition
...// d3 v5
d3.select("#myid").transition().style("opacity","0").on("end", myCallback);
// old way
d3.select("#myid").transition().style("opacity","0").each("end", myCallback);
This demo uses the "end" event to chain many transitions in order.
The donut example that ships with D3 also uses this to ...
Java: How to convert List to Map
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With java-8, you'll be able to do this in one line using streams, and the Collectors class.
M...