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What do helper and helper_method do?
... This is used for any method that you need to access from both controllers and helpers/views (standard helper methods are not available in controllers). e.g. common use case:
#application_controller.rb
def current_user
@current_user ||= User.find_by_id!(session[:user_id])
end
helper_method :curre...
What is the difference between JDK dynamic proxy and CGLib?
...roxy Design Pattern , What is the difference between JDK's Dynamic Proxy and third party dynamic code generation API s such as CGLib ?
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Android and XMPP: Currently available solutions [closed]
Which XMPP library would be the best choice nowadays for Android development?
7 Answers
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An “and” operator for an “if” statement in Bash
I'm trying to create a simple Bash script to check if the website is down and for some reason the "and" operator doesn't work:
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git still shows files as modified after adding to .gitignore
...n you commit the .idea/ directory will be removed from your git repository and the following commits will ignore the .idea/ directory.
PS: You could use .idea/ instead of .idea/* to ignore a directory. You can find more info about the patterns on the .gitignore man page.
Helpful quote from the g...
How does Apple find dates, times and addresses in emails?
...n an email contains a date, time or location, the text becomes a hyperlink and it is possible to create an appointment or look at a map simply by tapping the link. It not only works for emails in English, but in other languages also. I love this feature and would like to understand how they do it.
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Insert line after first match using sed
For some reason I can't seem to find a straightforward answer to this and I'm on a bit of a time crunch at the moment. How would I go about inserting a choice line of text after the first line matching a specific string using the sed command. I have ...
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Find the index of a dict within a list, by matching the dict's value
...answered Dec 8 '10 at 20:03
toklandtokland
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Easy way to test a URL for 404 in PHP?
I'm teaching myself some basic scraping and I've found that sometimes the URL's that I feed into my code return 404, which gums up all the rest of my code.
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Generate an integer that is not among four billion given ones
...nge.
If "integer" means mathematical integer: Read through the input once and keep track of the largest number length of the longest number you've ever seen. When you're done, output the maximum plus one a random number that has one more digit. (One of the numbers in the file may be a bignum that t...